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Unusual weather trivia that is hard to google

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#201
BLI snowman

Posted 03 August 2017 - 07:51 PM

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We'll have to see a fall without a record warm month at some point as well. Been since 2013...

 

Setting the August record should put things at ease for a few more months



#202
wx_statman

Posted 03 August 2017 - 08:54 PM

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Setting the August record should put things at ease for a few more months

 

Breaking 1967's maximums record is the real prize. 2014 felt cheap in a way since we skated to the record on warm minimums.



#203
Scott

Posted 04 August 2017 - 07:16 AM

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I don't know the answer to this, but which states in the lower 48 have had the daily high and low?

 

Off the top of my head, I have seen the following states have the daily low:

 

Oregon 

California

Nevada

Utah

Idaho

Arizona

New Mexico
Colorado

Wyoming

Montana

North Dakota

South Dakota

Nebraska

Iowa

Minnesota

Maine 

Vermont

New Hampshire

New York

West Virginia

 

I assume Washington has had it as well, though I don't remember ever seeing one.  I want to say that I vaguely remember Indiana has had one, but I'm not 100% sure on this.

 

For the Nation's high (Lower 48 at least), I remember the following (I'm guessing that I am missing a bunch here):

 

California

Nevada

Utah

Arizona

New Mexico

Utah

Montana

Minnesota (at International Falls!)

Texas
South Dakota

Nebraska

Kansas

Florida

Alabama

Georgia

Maryland

 

I vaguely remember North Dakota as well. 

 

I assume that I am missing a bunch, but which states are there.  I'm guessing that Washington may have been on there at one time or another and certainly states such as South Carolina.  


At home:

 

Coldest temperature thus far in 2018:   -26 on 2/21

 

Warmest temperature thus far in 2018:  99 on 7/8 (All time record high)

 

Precip thus far in 2018:   11.01 inches

 

Snowfall thus far in 2018:   38.7 inches

 

Last frost of early summer:  7/1

 

First frost of late summer:  8/29

 

Last snow of late spring:  5/1 

 

First snow of early fall:   10/6


#204
BLI snowman

Posted 04 August 2017 - 09:28 AM

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Breaking 1967's maximums record is the real prize. 2014 felt cheap in a way since we skated to the record on warm minimums.

 

First ever month with an average max over 90 appears possible.



#205
Jesse

Posted 04 August 2017 - 09:33 AM

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First ever month with an average max over 90 appears possible.


Slow down there turbo. Only the 4th.

#206
BLI snowman

Posted 04 August 2017 - 09:40 AM

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Slow down there turbo. Only the 4th.

 

It'll take a 1977/2004 style Pacific jet lashing to avoid it.



#207
Jesse

Posted 04 August 2017 - 09:46 AM

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It'll take a 1977/2004 style Pacific jet lashing to avoid it.


That feels about right.

#208
wx_statman

Posted 04 August 2017 - 11:08 AM

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I don't know the answer to this, but which states in the lower 48 have had the daily high and low?

 

Off the top of my head, I have seen the following states have the daily low:

 

Oregon 

California

Nevada

Utah

Idaho

Arizona

New Mexico
Colorado

Wyoming

Montana

North Dakota

South Dakota

Nebraska

Iowa

Minnesota

Maine 

Vermont

New Hampshire

New York

West Virginia

 

I assume Washington has had it as well, though I don't remember ever seeing one.  I want to say that I vaguely remember Indiana has had one, but I'm not 100% sure on this.

 

For the Nation's high (Lower 48 at least), I remember the following (I'm guessing that I am missing a bunch here):

 

California

Nevada

Utah

Arizona

New Mexico

Utah

Montana

Minnesota (at International Falls!)

Texas
South Dakota

Nebraska

Kansas

Florida

Alabama

Georgia

Maryland

 

I vaguely remember North Dakota as well. 

 

I assume that I am missing a bunch, but which states are there.  I'm guessing that Washington may have been on there at one time or another and certainly states such as South Carolina.  

 

I remember a few instances where California had both the national high and low on the same day, during the summer months. A place like Truckee or Bodie can have the national low, and Death Valley the national high later that afternoon. 



#209
wx_statman

Posted 04 August 2017 - 11:10 AM

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It'll take a 1977/2004 style Pacific jet lashing to avoid it.

 

It just might happen. This year has had a real disco-era vibe to it, between the 1979-esque January and the 1977-esque August heat wave.


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#210
BLI snowman

Posted 04 August 2017 - 12:05 PM

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It just might happen. This year has had a real disco-era vibe to it, between the 1979-esque January and the 1977-esque August heat wave.


It's been a real Donna Summer.

#211
wx_statman

Posted 04 August 2017 - 12:12 PM

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It's been a real Donna Summer.

 

Clever.



#212
Scott

Posted 04 August 2017 - 12:30 PM

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I remember a few instances where California had both the national high and low on the same day, during the summer months. A place like Truckee or Bodie can have the national low, and Death Valley the national high later that afternoon. 

 

Yes.  I have seen Arizona, Nevada, and Utah do that as well.


At home:

 

Coldest temperature thus far in 2018:   -26 on 2/21

 

Warmest temperature thus far in 2018:  99 on 7/8 (All time record high)

 

Precip thus far in 2018:   11.01 inches

 

Snowfall thus far in 2018:   38.7 inches

 

Last frost of early summer:  7/1

 

First frost of late summer:  8/29

 

Last snow of late spring:  5/1 

 

First snow of early fall:   10/6


#213
wx_statman

Posted 05 August 2017 - 10:19 PM

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Here's an interesting (in my opinion) way of looking at when Portland's summer season "peaks" - probability of maximum thresholds. Using PDX data, here is the day of the year with the maximum probability of occurrence for each maximum threshold:

 

70F - Jul 31st (98.8%)

75F - Aug 10th (86.1%)

80F - Jul 26th (67.5%)

85F - Aug 14th (41.8%)

90F - Aug 9th (24.1%)

95F - Aug 8th (12.7%)

100F - Aug 8th & Aug 11th (5.1%)


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#214
wx_statman

Posted 09 August 2017 - 01:14 AM

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Here are some places I know of in the lower 48 that do have their record lows in March, or did until not that long ago:

 

Iowa (several locations) due to the March 1962 cold snap.  Southeast USA (March 1980 cold snap, though most of these were eclipsed in 1985)

 

Those were in early March though.   

 

 

I found another good one. 

 

All-time record low of -48F at Mohall, ND on 3/14/1897. This is the ND state record for March that's listed under "McKinney" in the Infoplease tables. A check of Google maps shows those two towns are right next to each other. It passes the initial smell test since that cold wave also produced -45F in Glasgow and -41F in Havre. 

 

Siting is a possible issue however. Mohall/McKinney also hit -48F on 2/9/1900, when no other station in North Dakota dropped below -42F. They also dropped to -48F on 2/8/1899 (a value that I would definitely believe given that cold wave), but have never been below -47F since. It's a little suspect that a station hits its all-time record low three times in three years and then never gets there again. Very possible that the station was repositioned sometime after 1900 to reflect standard measuring conditions. 


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#215
Scott

Posted 09 August 2017 - 07:54 PM

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I found another good one. 

 

All-time record low of -48F at Mohall, ND on 3/14/1897. This is the ND state record for March that's listed under "McKinney" in the Infoplease tables. A check of Google maps shows those two towns are right next to each other. It passes the initial smell test since that cold wave also produced -45F in Glasgow and -41F in Havre. 

 

Siting is a possible issue however. Mohall/McKinney also hit -48F on 2/9/1900, when no other station in North Dakota dropped below -42F. They also dropped to -48F on 2/8/1899 (a value that I would definitely believe given that cold wave), but have never been below -47F since. It's a little suspect that a station hits its all-time record low three times in three years and then never gets there again. Very possible that the station was repositioned sometime after 1900 to reflect standard measuring conditions. 

 

Interesting.     Portal isn't that far from Mohall and recorded a -42F on 3/14/1897.  If it weren't for the cold snap in 1936, this would have been within three degrees of the record low there.  It appears that the  data from 2/15/1936 and 2/16/1936 is missing on Mohall.

 

Looking at both Portal and Mohall, I suspect that the Mohall readings might be correct, but that had the Mohall station been reporting on 2/15/1936 and 2/16/1936, it mayhave broken the March record (of course this is just speculation).   The March record is very impressive no matter what though.


At home:

 

Coldest temperature thus far in 2018:   -26 on 2/21

 

Warmest temperature thus far in 2018:  99 on 7/8 (All time record high)

 

Precip thus far in 2018:   11.01 inches

 

Snowfall thus far in 2018:   38.7 inches

 

Last frost of early summer:  7/1

 

First frost of late summer:  8/29

 

Last snow of late spring:  5/1 

 

First snow of early fall:   10/6


#216
wx_statman

Posted 09 August 2017 - 11:19 PM

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Interesting.     Portal isn't that far from Mohall and recorded a -42F on 3/14/1897.  If it weren't for the cold snap in 1936, this would have been within three degrees of the record low there.  It appears that the  data from 2/15/1936 and 2/16/1936 is missing on Mohall.

 

Looking at both Portal and Mohall, I suspect that the Mohall readings might be correct, but that had the Mohall station been reporting on 2/15/1936 and 2/16/1936, it mayhave broken the March record (of course this is just speculation).   The March record is very impressive no matter what though.

 

It appears that the minimums for Mohall have been QC'd out for the dates of Feb. 15 & 16, 1936, along with so many other readings in the national database (thanks NCEI).

 

According to the February 1936 ND state climo publication, Mohall recorded -42F on the 15th and -44F on the 16th. Apparently that particular area didn't see minimums as cold as some of the other parts of the state. Just to the south of Mohall, Foxholm 7N also bottomed out at -44F during that cold wave.


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#217
Scott

Posted 10 August 2017 - 04:52 AM

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It appears that the minimums for Mohall have been QC'd out for the dates of Feb. 15 & 16, 1936, along with so many other readings in the national database (thanks NCEI).

 

Weird.  Those readings don't seem implausible in any way.  In fact, I'm surprised that they weren't colder.  


At home:

 

Coldest temperature thus far in 2018:   -26 on 2/21

 

Warmest temperature thus far in 2018:  99 on 7/8 (All time record high)

 

Precip thus far in 2018:   11.01 inches

 

Snowfall thus far in 2018:   38.7 inches

 

Last frost of early summer:  7/1

 

First frost of late summer:  8/29

 

Last snow of late spring:  5/1 

 

First snow of early fall:   10/6


#218
wx_statman

Posted 10 August 2017 - 11:24 AM

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Weird.  Those readings don't seem implausible in any way.  In fact, I'm surprised that they weren't colder.  

 

I can't figure out what algorithm they're using to flag readings. It seems random, although I'm sure that it's not since they're using statistical formulas. They'll remove certain readings that don't seem out of place (like Feb. 1936) but leave in other readings that totally stick out. Like the 3/14/1897 minimum for example. Makes no sense. 



#219
wx_statman

Posted 15 August 2017 - 11:02 PM

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Fun fact about the 2016-17 winter: This was only the 2nd winter @ PDX to have at least 12 maximums at/below 40 in both December and January. The other was 1978-79.



#220
wx_statman

Posted 03 September 2017 - 01:38 AM

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1988 repeat incoming.

 

Well done.



#221
wx_statman

Posted 03 September 2017 - 01:41 AM

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Here are the "most overdue" heat waves currently at PDX, based on calendar month:

 

  • February reading above 65. None since 1995, after occurrences in 1958, 1968, 1977, 1986, 1988, 1991, and 1995. 
  • August reading above 102. None since 1981, after occurrences in 1972, 1977, and 1981. 
  • September reading above 95. None since 1988, after occurrences in 1944, 1952, 1955, 1958, 1972, 1973, 1974, 1981, and 1988.
  • October reading above 85. None since 1991, after occurrences in 1952, 1970, 1975, 1979, 1980, 1987, 1988, and 1991. 

 

 

Two down. 


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#222
wx_statman

Posted 08 September 2017 - 01:48 AM

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It's interesting looking back at the -PDO period that kicked off a decade ago. PDX saw April freezes in 5 of 6 years from 2007-12, the only exception being 2010. In contrast, there weren't any April freezes between 1999 and 2007, and none since 2012. Pretty strong correlation there it seems. If I was in agriculture or in the business of predicting crop prices in the PNW which have April frost sensitivity, I would take note of the PDO and its tendencies. 



#223
wx_statman

Posted 10 September 2017 - 10:50 PM

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This is what I have for April record lows across northern tier states (as well as southern Canada)...corrections welcome.

Washington: -7 Lake Keechelus 4/1/1936
Oregon: -23 Meacham 4/1/1936
Idaho: -22 Copper Basin 4/5/1997
Montana: -33 Gates Park 4/2/2002
Wyoming: -29 Lake Yellowstone 4/1/1920
North Dakota: -24 Powers Lake 4/2/1975
South Dakota: -16 Deerfield 4/3/1951
Minnesota: -22 Karlstad 4/6/1979
Wisconsin: -17 Rest Lake 4/1/1923
Michigan: -17 Champion Van Riper Park 4/4/1954 (official), Bergland -34 4/1/1923 (unofficial)
New York: -24 North Lake 4/1/1923
Vermont: -13 Mt Mansfield 4/7/1982
New Hampshire: -20 Mt Washington 4/5/1995
Maine: -14 Clayton Lake 4/2/1964

BC: -31 Smith River 4/1/1954
Alberta: -38 Peace River 4/2/1954
Saskatchewan: -40 Key Lake 4/1/1996
Manitoba: -35 Port Nelson 4/14/1923
Ontario: -35 Hornepayne 4/2/1932
Quebec: -35 Doucet 4/1/1923
 

 

I took a look at the Michigan climate report for April 1923, and I'm really starting to think the Bergland reading was legit. In addition to the supposed -34F at Bergland on 4/1/1923, there was a -30F reading at Humboldt in Marquette County that morning. Readings dropped to -23F at Mio and -20F at Hale Loud Dam in lower Michigan as well. The Mio reading in lower Michigan looks totally legit even if we discount the -30s in the UP. Mio (technically "Mio Hydro Plant") appears to be a location prone to extremes. It holds the MI state record high of 112F from July 1936 and also fell to -45F on 2/9/1934, when nearby Vanderbilt set the state record low of -51F. 


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#224
wx_statman

Posted 11 September 2017 - 06:09 PM

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PDX average maximums, duration records:

 

5 days:

104.2 (Aug 6 - Aug 10, 1981)

101.8 (Jul 13 - Jul 17, 1941)

101.0 (Jul 27 - Jul 31, 2009)

99.8 (Jul 19 - Jul 23, 1994)

99.4 (Aug 9 - Aug 13, 1977)

 

10 days:

97.1 (Aug 8 - Aug 17, 1977)

96.8 (Jul 25 - Aug 3, 2009)

96.4 (Aug 5 - Aug 14, 1981)

94.6 (Jul 12 - Jul 21, 1941)

94.4 (Jul 31 - Aug 9, 2017)

 

15 days:

94.53 (Aug 3 - Aug 17, 1977)

93.20 (Aug 4 - Aug 18, 1981)

92.87 (Jul 20 - Aug 3, 2009)

92.20 (Jun 25 - Jul 9, 2015)

92.13 (Aug 8 - Aug 22, 1967)

 

20 days:

93.15 (Jul 30 - Aug 18, 1977)

91.95 (Jul 15 - Aug 3, 2009)

90.95 (Aug 9 - Aug 28, 1967)

90.20 (Jul 22 - Aug 10, 2017)

89.85 (Aug 4 - Aug 23, 1981)

 

25 days:

90.64 (Jul 24 - Aug 17, 1977)

89.84 (Aug 8 - Sep 1, 1967)

89.24 (Jun 25 - Jul 19, 2015)

88.92 (Jul 10 - Aug 3, 2009)

88.64 (Jul 5 - Jul 29, 1985)

 

30 days:

89.43 (Jul 20 - Aug 18, 1977)

88.33 (Aug 8 - Sep 6, 1967)

88.27 (Jun 21 - Jul 20, 2015)

87.57 (Jul 31 - Aug 29, 2017)

87.37 (Jul 14 - Aug 12, 1990)

 

35 days:

87.86 (Aug 1 - Sep 4, 2017)

87.80 (Jul 14 - Aug 17, 1977)

87.69 (Jul 9 - Aug 12, 1990)

87.66 (Jul 29 - Sep 1, 1967)

87.29 (Jul 16 - Aug 19, 1971)

 

 

40 days:

87.83 (ending on 9/6/2017)

87.53 (ending on 8/1/2015)

86.93 (ending on 9/4/1967)

86.90 (ending on 8/15/1990)

86.73 (ending on 8/21/1971)

 

50 days:

87.00 (ending on 9/8/2017)

86.92 (ending on 8/13/2015)

85.96 (ending on 9/3/1972)

85.80 (ending on 9/7/1967)

85.22 (ending on 8/30/1971)

 

60 days:

86.58 (ending on 8/23/2015)

86.00 (ending on 9/11/2017) - today!

85.40 (ending on 8/29/1967)

84.75 (ending on 8/28/2014)

t-84.65 (ending on 9/8/1972)

t-84.65 (ending on 9/6/2003)

 

75 days:

85.99 (ending on 8/27/2015)

85.55 (ending on 9/5/2017)

84.75 (ending on 9/5/1967)

83.92 (ending on 9/6/2003)

83.91 (ending on 9/13/2014)

 

90 days:

85.13 (ending on 9/1/2015)

84.13 (ending on 9/11/2017) - today!

84.07 (ending on 9/27/1967)

83.17 (ending on 9/21/2014)

82.42 (ending on 9/27/1994)


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#225
wx_statman

Posted 12 September 2017 - 01:00 PM

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This is what I have for April record lows across northern tier states (as well as southern Canada)...corrections welcome.

Washington: -7 Lake Keechelus 4/1/1936
Oregon: -23 Meacham 4/1/1936
Idaho: -22 Copper Basin 4/5/1997
Montana: -33 Gates Park 4/2/2002
Wyoming: -29 Lake Yellowstone 4/1/1920
North Dakota: -24 Powers Lake 4/2/1975
South Dakota: -16 Deerfield 4/3/1951
Minnesota: -22 Karlstad 4/6/1979
Wisconsin: -17 Rest Lake 4/1/1923
Michigan: -17 Champion Van Riper Park 4/4/1954 (official), Bergland -34 4/1/1923 (unofficial)
New York: -24 North Lake 4/1/1923
Vermont: -13 Mt Mansfield 4/7/1982
New Hampshire: -20 Mt Washington 4/5/1995
Maine: -14 Clayton Lake 4/2/1964

BC: -31 Smith River 4/1/1954
Alberta: -38 Peace River 4/2/1954
Saskatchewan: -40 Key Lake 4/1/1996
Manitoba: -35 Port Nelson 4/14/1923
Ontario: -35 Hornepayne 4/2/1932
Quebec: -35 Doucet 4/1/1923
 

 

For the eastern portion of MT, the April record might be -27F at Redstone on 4/2/1975. 

 

I noticed that Redstone also hit -48F on 2/28/1962, so this station can definitely experience very cold minimums.


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#226
wx_statman

Posted 12 September 2017 - 01:04 PM

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Speaking of late February 1962, what an incredible cold wave. Readings dropped to -52F at Thoeny and -51F at Opheim 10N on 2/28/1962, both in northeastern MT, in addition to -51F at West Yellowstone on the 27th. A number of other stations in NE Montana dropped close to -50F, like Redstone above and a few others. Just a day later and this cold wave would have set the March record low for the conterminous US, which stands at -50F from March 1906 in WY. 


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#227
wx_statman

Posted 14 September 2017 - 11:11 PM

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Wanted to make a post about the cold trough in early June 1914. Pretty special event.

 

-Downtown Portland had a 51/45 day on the 6th

-Ashland was 56/33 on the 5th

-Prospect, at 2,800' in SW Oregon, recorded 0.2" of snow on the 4th with a high of 47 on the 6th

-Baker City recorded 0.4" of snow with a 41/32 day on the 4th

-Joseph had a 45/24 day on the 5th with 6.0" storm total snowfall

-Lakeview recorded 1.4" of snow on the 4th followed by a 45/20 day on the 5th

-Musick Mine, at 5,000' in the Umpqua National Forest, recorded a monthly total of 21.5" of snow

-Burns recorded 2.0" of snow, the modern day (1939-) June record is 1.0" on 6/5/1954

 

-Downtown Seattle recorded sub-62 maximums for 8 straight days (2nd-9th), including 53 on both the 7th & 8th

 

-Elko, NV recorded 1.7" of snow on the 5th followed by a low of 12 on the 6th, the only sub-20 low on record in the month of June


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#228
wx_statman

Posted 16 September 2017 - 10:01 PM

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April 2015 in Maine -

 

State record low for the month appears to have been set @ Van Buren with a reading of -19F on the 6th. Monthly record for ME for April was (as of 2004) listed as -14F at Clayton Lake in 1964:

 

https://www.infoplea...rature-extremes

 

The Van Buren reading smashed the previous monthly record low for the station by 9 degrees, previously -10F on 4/2/1964. 

 

Also on 4/6/2015, Bridgewater hit -14F, Houlton hit -13F and Fort Kent recorded -12F. At Houlton, the previous monthly record had been just -6F. Caribou fell to -4F for a monthly record and also their latest sub-zero reading, previous mark for both categories was -2F on 4/2/1964.


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#229
Scott

Posted 17 September 2017 - 08:20 PM

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Wanted to make a post about the cold trough in early June 1914. Pretty special event.

 

 

On 6/6/1914, Salt Lake City had a low of 32F and 2.0 inches of snow, which is the latest frost and latest measurable snow for that location. 

 

1007375.JPG


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At home:

 

Coldest temperature thus far in 2018:   -26 on 2/21

 

Warmest temperature thus far in 2018:  99 on 7/8 (All time record high)

 

Precip thus far in 2018:   11.01 inches

 

Snowfall thus far in 2018:   38.7 inches

 

Last frost of early summer:  7/1

 

First frost of late summer:  8/29

 

Last snow of late spring:  5/1 

 

First snow of early fall:   10/6


#230
wx_statman

Posted 17 September 2017 - 08:56 PM

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On 6/6/1914, Salt Lake City had a low of 32F and 2.0 inches of snow, which is the latest frost and latest measurable snow for that location. 

 

1007375.JPG

 

Very impressive.



#231
Black Hole

Posted 18 September 2017 - 09:45 AM

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This last spring SLC had a bit of snow on May 17th which was very anomalous and caused problems for gardens. I can't imagine 2 inches of wet snow almost 3 weeks later!


BS Atmospheric Science University of Utah May 2015

PhD Candidate Atmospheric Sciences

 

--Emphasis on: Forecasting, Mountain Weather, Numerical Weather Prediction, Data Assimilation

 

Winter 2017/2018

Dec 4: 3.2", 16: 0.9", 20: 2.1", 23: 1.5", 25: 4.6"

Jan 6: 1.5", 20: 10.8", 25: 1.5"

Feb 19: 8.6", 20: 2.4", 23: 7.1", 25: .5"

Mar 4: 13", 15: 1.8", 17: 5.3", 25: 4.2"

April 12: 1", 17: 1.3"

Total: 69.3"

 

 

Winter 2016/17 Snow:
Nov 17: 3.2", 23: 1.6", 28: 9.2" (14)

Dec 1: .5", 16: 2.5", 25: 13" (16)

Jan 2: 5", 3: 2.4", 4: 7.7", 12: 1", 19: 1.2", 21: 13", 23: 6", 24: 1", 25: 3.7", 26: 2.5" (43.5) 

Feb 11: .5", 23: 6.5", 27: 4.5" (13.5)

Mar 5: 5.5" (5.5)

Apr 8: 2", 9: 1.8" (3.8)

May 17: 1" (1)
Total: 96.3"

Lowest Temp: 2F


#232
Phil

Posted 18 September 2017 - 11:57 AM

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This is the best thread on the forum, IMO. I'm learning something new every hour. 🤓
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#233
wx_statman

Posted 18 September 2017 - 11:39 PM

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Just found this interesting nugget - Prineville hit -37F in late December 1884, which actually exceeds the official all-time record low of -35F on 1/21/1930. 

 

This was part of a major cold wave centered on New Years 1884/1885 that also dropped The Dalles to -27F, produced maximums of -6F in Spokane and -5F in Lewiston (2nd coldest maximum there behind -8F in Dec 1968), and brought all-time record lows to Poplar River, MT (-63F), Regina, SK (-58F), and Duluth, MN (-41F), the latter two occurring during the first couple days of January 1885. 

 

From the The Biennial Report of the Oregon Weather Bureau, 1891:

 

 

Attached Files


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#234
BLI snowman

Posted 19 September 2017 - 12:08 AM

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Just found this interesting nugget - Prineville hit -37F in late December 1884, which actually exceeds the official all-time record low of -35F on 1/21/1930. 

 

This was part of a major cold wave centered on New Years 1884/1885 that also dropped The Dalles to -27F, produced maximums of -6F in Spokane and -5F in Lewiston (2nd coldest maximum there behind -8F in Dec 1968), and brought all-time record lows to Poplar River, MT (-63F), Regina, SK (-58F), and Duluth, MN (-41F), the latter two occurring during the first couple days of January 1885. 

 

From the The Biennial Report of the Oregon Weather Bureau, 1891:

 

Mean temperature of 50F in Prineville in DJF?

 

#1800swerereallywarm



#235
wx_statman

Posted 19 September 2017 - 12:30 AM

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Mean temperature of 50F in Prineville in DJF?

 

#1800swerereallywarm

 

Yeah, I don't know what they were smoking there. Maybe it was a typo and they meant 30.



#236
wx_statman

Posted 22 September 2017 - 01:03 AM

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One of the most impressive late season readings that I've found in the US is the -34F at Deerfield, SD on 3/25/1965. This is a monthly record for the station and is only 1F from the SD state record low for the month, despite occurring less than a week from April.

 

This cold wave produced a number of incredible readings across the northern tier, including -41F at Summit, MT and -39F in Bigfork, MN on the 24th. Chesaw, WA fell to -11F on both the 25th and 26th, the latest readings below -10F in WA state history. PDX recorded its latest official measurable snowfall on the 25th (although it remains a mystery how nothing was measured on 4/22/1961).


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#237
wx_statman

Posted 03 October 2017 - 11:18 PM

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This is what I have for April record lows across northern tier states (as well as southern Canada)...corrections welcome.

Washington: -7 Lake Keechelus 4/1/1936
Oregon: -23 Meacham 4/1/1936
Idaho: -22 Copper Basin 4/5/1997
Montana: -33 Gates Park 4/2/2002
Wyoming: -29 Lake Yellowstone 4/1/1920
North Dakota: -24 Powers Lake 4/2/1975
South Dakota: -16 Deerfield 4/3/1951
Minnesota: -22 Karlstad 4/6/1979
Wisconsin: -17 Rest Lake 4/1/1923
Michigan: -17 Champion Van Riper Park 4/4/1954 (official), Bergland -34 4/1/1923 (unofficial)
New York: -24 North Lake 4/1/1923
Vermont: -13 Mt Mansfield 4/7/1982
New Hampshire: -20 Mt Washington 4/5/1995
Maine: -14 Clayton Lake 4/2/1964

BC: -31 Smith River 4/1/1954
Alberta: -38 Peace River 4/2/1954
Saskatchewan: -40 Key Lake 4/1/1996
Manitoba: -35 Port Nelson 4/14/1923
Ontario: -35 Hornepayne 4/2/1932
Quebec: -35 Doucet 4/1/1923
 

 

For Minnesota, in addition to the Karlstad reading (and the -22F at Tower on 4/6/1982), there's an older reading of -22F at Grand Portage on 4/1/1896. Kind of a strange case since the coldest readings in northern MN appear to have been on the 3rd-4th. Leech Lake fell to -13F on the 3rd and Pokegama recorded -16F on the 4th. The date of the 1st is therefore suspect...but interesting nonetheless. 



#238
wx_statman

Posted 03 October 2017 - 11:48 PM

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So, to update the above table given all of the additions/corrections over the past year (April record lows):

 

Washington: -7 Lake Keechelus 4/1/1936
Oregon: -23 Meacham 4/1/1936
Idaho: -22 Copper Basin 4/5/1997
Montana: -33 Gates Park 4/2/2002
Wyoming: -29 Lake Yellowstone 4/1/1920
North Dakota: -24 Powers Lake 4/2/1975
South Dakota: -22 Deerfield 4/2/1975
Minnesota: -22 Tower 4/6/1982, Karlstad 4/6/1979, Grand Portage 4/1/1896* (*possibly suspect)
Wisconsin: -28 Minocqua 4/1/1924 (possibly suspect as next coldest reading was -17 at Prentice; other candidate is -18 at Long Lake on 4/1/1923)
Michigan: -34 Bergland 4/1/1923

New York: -24 North Lake 4/1/1923
Vermont: -13 Mt Mansfield 4/7/1982
New Hampshire: -20 Mt Washington 4/5/1995
Maine: -19 Van Buren 4/6/2015

BC: -37 Dawson Creek 4/2/1954
Alberta: -41 Springdale 4/2/1954
Saskatchewan: -41 Carswell Lake 4/1/1982
Manitoba: -36 Ruttan Lake 4/6/1982
Ontario: -37 Central Patricia 4/6/1972
Quebec: -35 Doucet 4/1/1923



#239
BLI snowman

Posted 04 October 2017 - 08:21 AM

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One of the most impressive late season readings that I've found in the US is the -34F at Deerfield, SD on 3/25/1965. This is a monthly record for the station and is only 1F from the SD state record low for the month, despite occurring less than a week from April.

 

This cold wave produced a number of incredible readings across the northern tier, including -41F at Summit, MT and -39F in Bigfork, MN on the 24th. Chesaw, WA fell to -11F on both the 25th and 26th, the latest readings below -10F in WA state history. PDX recorded its latest official measurable snowfall on the 25th (although it remains a mystery how nothing was measured on 4/22/1961).

 

Yeah, PDX has always been pretty poor at measuring anything during wet snow events, obviously their elevation plays a part in that but they also seem to have a tendency to lowball. I believe that most of the Portland metro above 100' had an inch or more that morning though.

 

And there were actually two incredible airmasses in March 1965. It was the coldest March on record, nationally. And for the Intermountain West it was the 2nd consecutive year with a major arctic blast during that first week of spring.



#240
wx_statman

Posted 04 October 2017 - 12:03 PM

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Yeah, PDX has always been pretty poor at measuring anything during wet snow events, obviously their elevation plays a part in that but they also seem to have a tendency to lowball. I believe that most of the Portland metro above 100' had an inch or more that morning though.

 

And there were actually two incredible airmasses in March 1965. It was the coldest March on record, nationally. And for the Intermountain West it was the 2nd consecutive year with a major arctic blast during that first week of spring.

 

Yeah, the airmass around the 17th-19th was no joke either. Pretty spectacular retrogression leading up to that event as well, after a week of warm weather here. 



#241
BLI snowman

Posted 04 October 2017 - 01:31 PM

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Yeah, the airmass around the 17th-19th was no joke either. Pretty spectacular retrogression leading up to that event as well, after a week of warm weather here. 

 

Essentially no precip here that month before the 25th. That's how you know it's a ridiculously amplified pattern.



#242
wx_statman

Posted 04 October 2017 - 02:05 PM

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Essentially no precip here that month before the 25th. That's how you know it's a ridiculously amplified pattern.

 

Pretty good historical analog to March 1913 as well, with regards to the twin peaks around the 18th-20th or so and again around the 24th-26th. 



#243
wx_statman

Posted 08 October 2017 - 09:59 PM

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An amazing week for temperature extremes across the US occurred in September 1895. 

 

A record heat wave affected the Great Plains just after mid-month. Sioux City, IA experienced its latest triple digits on record with 103 on the 17th and 101 on the 18th. The ridge of high pressure migrated east, giving New England an incredible late season heat wave. Farmington, ME hit 100 degrees on the 22nd, which still stands as the Maine state record high for the month of September despite occurring a day after the fall equinox. At the same time, a record cold wave affected the western US. On the same day that Farmington hit 100, Lander, WY fell to 7 degrees, which to this day is nearly a month earlier than their next-earliest single digits (10/17/1925). The Nevada state record low for September was set at Carlin with a reading of 0 degrees. Government Camp recorded 9.5" of snow on the 19th-20th, followed by a low of 20 on the 21st - by far the coldest and snowiest weather experienced at that elevation of Mount Hood to the present day. Downtown Portland had a high of 58 on the 20th, followed by a low of 36 on the 21st. Blaine, WA fell to 25 on the 21st.


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#244
Phil

Posted 09 October 2017 - 08:40 AM

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Wow. That must've required some ridiculous wave amplification.
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#245
wx_statman

Posted 09 October 2017 - 11:20 PM

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From Wunderground:

 

Nate’s trek north helped reinforce a very warm, moist air mass in place east of the Appalachians. Summerlike dew points in the 70s led to unusually muggy conditions for early October. The low temperature on Sunday at Washington’s Reagan National Airport was 75°F. In records dating back to 1874, that was the city’s warmest daily minimum ever recorded in October, breaking the 74°F record set on October 4 and 5, 1898, and October 4, 1941. Capital Weather Gang reported that the mid-70s dew points were virtually unprecedented for this late in the autumn. All-time warm daily lows for October were also set at Washington’s Dulles Airport (73°F) and Philadelphia (74°F). Conditions in D.C. on Sunday were so oppressive that the annual Army Ten-Miler Road Race was cut short and recast as a “recreational run,” according to Stars and Stripes.

 

Just wanted to highlight a truly remarkable heat wave that affected the mid-Atlantic in early October 1941. In addition to the record warm minimum of 74, Washington DC also set its still-standing monthly record high of 96 on the 5th of that month. Philadelphia posted 96-95-93 on the 5th-7th, while no other October in history even topped 91. Likewise, Wilmington DE posted 94-93-93 on those dates while no other October reading in history exceeded 91. NYC-Central Park hit 94 on the 5th while the next highest Oct reading is also 91, in a period of record back to 1869. Richmond VA reeled off 97-99-95-95 on the 5th-8th, it wasn't until 10/9/2007 that Richmond saw any other October reading crack 95 degrees (Washington DC hit 94 on 10/9/2007, also the closest they've come to Oct 1941). State record maximums for October were set in Virginia (101 in Walkerton), Pennsylvania (100 in Phoenixville), Maryland (99 in Blackwater), New Jersey (97 in Tuckerton), and Delaware (97 in Bridgeville).


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#246
Phil

Posted 09 October 2017 - 11:39 PM

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Man oh man. And I thought today was awful enough..upper 90s in October is nuts. The 2007 heatwave is kinda vague to me, but I know it wasn't this humid.

Those 1930s and 1940s summers/autumns were the worst of the worst, though. I think all of DCA's J/J/A/S/O monthly dewpoint records were set in the 1940s. The October record is 78*F, as far as I'm aware, and the all-time high is 89*F, set in June of 1943 IIRC.
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#247
weatherfan2012

Posted 10 October 2017 - 11:05 AM

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Man oh man. And I thought today was awful enough..upper 90s in October is nuts. The 2007 heatwave is kinda vague to me, but I know it wasn't this humid.
Those 1930s and 1940s summers/autumns were the worst of the worst, though. I think all of DCA's J/J/A/S/O monthly dewpoint records were set in the 1940s. The October record is 78*F, as far as I'm aware, and the all-time high is 89*F, set in June of 1943 IIRC.

upper 90s in october is insanely hot.

#248
Phil

Posted 14 October 2017 - 12:58 AM

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FWIW, I screwed up. The October dewpoint record of 78*F was actually set in 1995, not 1941. Also, the September dewpoint record is 84*F, set in 1946, not 1943. The all-time dewpoint record is 88*F, set in July of 1943.

Lots of very humid summers in the 1940s-50s. Much cooler and less humid summers in the 1960s and early/mid 1970s, then the nasty ones started re-appearing in the early 1980s.

The summers from 2010-present have been very similar to those back in the 1940s-50s. Dewpoints reached 80*F or higher in 2011, 2013, 2016, and 2017.
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#249
erik1974

Posted 19 October 2017 - 07:13 PM

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    As for the -34 degree reading at Bergland, MI being the April record low, it appears that all of the data for March/April 1923(and earlier) was actually recorded one day â€‹after it occurred when compared to surrounding stations in N. Wis and Western UP of MI.  I believe that the -34 reading in Bergland â€‹actually occurred on March 31 â€‹and is therefore invalid as an April reading.  There is a -17 reading on 4/2 is what I believe is the true Apr. 1 reading at that station.  In the Eastern UP and eastward toward New York state, all of the readings on 4/1/1923 are colder that the 3/31 values.  therefore I believe that the -30 degree reading at Humboldt(near Champion) on 4/1/1923 is the true record low April reading for Michigan.  â€‹There is also a -27 reading on 4/1/1924 there as well making it the second legitimately coldest reading for April.  As noted before Mio also reached -23 on 4/1/1923, so I think my theory is pretty sound.  In general, MN/WI/Western UP recorded there coldest temps on 3/31, while everthing east of there was coldest on 4/1/1923.  Any argument will be greatly appreciated!!



#250
wx_statman

Posted 19 October 2017 - 07:29 PM

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    As for the -34 degree reading at Bergland, MI being the April record low, it appears that all of the data for March/April 1923(and earlier) was actually recorded one day â€‹after it occurred when compared to surrounding stations in N. Wis and Western UP of MI.  I believe that the -34 reading in Bergland â€‹actually occurred on March 31 â€‹and is therefore invalid as an April reading.  There is a -17 reading on 4/2 is what I believe is the true Apr. 1 reading at that station.  In the Eastern UP and eastward toward New York state, all of the readings on 4/1/1923 are colder that the 3/31 values.  therefore I believe that the -30 degree reading at Humboldt(near Champion) on 4/1/1923 is the true record low April reading for Michigan.  â€‹There is also a -27 reading on 4/1/1924 there as well making it the second legitimately coldest reading for April.  As noted before Mio also reached -23 on 4/1/1923, so I think my theory is pretty sound.  In general, MN/WI/Western UP recorded there coldest temps on 3/31, while everthing east of there was coldest on 4/1/1923.  Any argument will be greatly appreciated!!

 

Minimums were never offset at COOP stations, just maximums. The -34 at Bergland was indeed on April 1, 1923.