BLI snowman Posted August 4, 2017 Report Share Posted August 4, 2017 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 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 4, 2017 Report Share Posted August 4, 2017 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. Quote Link to comment Share on other sites More sharing options...
Scott Posted August 4, 2017 Author Report Share Posted August 4, 2017 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 CaliforniaNevadaUtahIdahoArizonaNew MexicoColoradoWyomingMontanaNorth DakotaSouth DakotaNebraskaIowaMinnesotaMaine VermontNew HampshireNew YorkWest 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): CaliforniaNevadaUtahArizonaNew MexicoUtahMontanaMinnesota (at International Falls!)TexasSouth DakotaNebraskaKansasFloridaAlabamaGeorgiaMaryland 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. Quote Link to comment Share on other sites More sharing options...
BLI snowman Posted August 4, 2017 Report Share Posted August 4, 2017 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. Quote Link to comment Share on other sites More sharing options...
Jesse Posted August 4, 2017 Report Share Posted August 4, 2017 First ever month with an average max over 90 appears possible.Slow down there turbo. Only the 4th. Quote Link to comment Share on other sites More sharing options...
BLI snowman Posted August 4, 2017 Report Share Posted August 4, 2017 Slow down there turbo. Only the 4th. It'll take a 1977/2004 style Pacific jet lashing to avoid it. Quote Link to comment Share on other sites More sharing options...
Jesse Posted August 4, 2017 Report Share Posted August 4, 2017 It'll take a 1977/2004 style Pacific jet lashing to avoid it.That feels about right. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 4, 2017 Report Share Posted August 4, 2017 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 CaliforniaNevadaUtahIdahoArizonaNew MexicoColoradoWyomingMontanaNorth DakotaSouth DakotaNebraskaIowaMinnesotaMaine VermontNew HampshireNew YorkWest 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): CaliforniaNevadaUtahArizonaNew MexicoUtahMontanaMinnesota (at International Falls!)TexasSouth DakotaNebraskaKansasFloridaAlabamaGeorgiaMaryland 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 4, 2017 Report Share Posted August 4, 2017 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. 1 Quote Link to comment Share on other sites More sharing options...
BLI snowman Posted August 4, 2017 Report Share Posted August 4, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 4, 2017 Report Share Posted August 4, 2017 It's been a real Donna Summer. Clever. Quote Link to comment Share on other sites More sharing options...
Scott Posted August 4, 2017 Author Report Share Posted August 4, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 6, 2017 Report Share Posted August 6, 2017 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%) 2 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 9, 2017 Report Share Posted August 9, 2017 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. 1 Quote Link to comment Share on other sites More sharing options...
Scott Posted August 10, 2017 Author Report Share Posted August 10, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 10, 2017 Report Share Posted August 10, 2017 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. 1 Quote Link to comment Share on other sites More sharing options...
Scott Posted August 10, 2017 Author Report Share Posted August 10, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 10, 2017 Report Share Posted August 10, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted August 16, 2017 Report Share Posted August 16, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 3, 2017 Report Share Posted September 3, 2017 1988 repeat incoming. Well done. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 3, 2017 Report Share Posted September 3, 2017 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. 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 8, 2017 Report Share Posted September 8, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 11, 2017 Report Share Posted September 11, 2017 This is what I have for April record lows across northern tier states (as well as southern Canada)...corrections welcome. Washington: -7 Lake Keechelus 4/1/1936Oregon: -23 Meacham 4/1/1936Idaho: -22 Copper Basin 4/5/1997Montana: -33 Gates Park 4/2/2002Wyoming: -29 Lake Yellowstone 4/1/1920North Dakota: -24 Powers Lake 4/2/1975South Dakota: -16 Deerfield 4/3/1951Minnesota: -22 Karlstad 4/6/1979Wisconsin: -17 Rest Lake 4/1/1923Michigan: -17 Champion Van Riper Park 4/4/1954 (official), Bergland -34 4/1/1923 (unofficial)New York: -24 North Lake 4/1/1923Vermont: -13 Mt Mansfield 4/7/1982New Hampshire: -20 Mt Washington 4/5/1995Maine: -14 Clayton Lake 4/2/1964 BC: -31 Smith River 4/1/1954Alberta: -38 Peace River 4/2/1954Saskatchewan: -40 Key Lake 4/1/1996Manitoba: -35 Port Nelson 4/14/1923Ontario: -35 Hornepayne 4/2/1932Quebec: -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. 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 12, 2017 Report Share Posted September 12, 2017 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) 2 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 12, 2017 Report Share Posted September 12, 2017 This is what I have for April record lows across northern tier states (as well as southern Canada)...corrections welcome. Washington: -7 Lake Keechelus 4/1/1936Oregon: -23 Meacham 4/1/1936Idaho: -22 Copper Basin 4/5/1997Montana: -33 Gates Park 4/2/2002Wyoming: -29 Lake Yellowstone 4/1/1920North Dakota: -24 Powers Lake 4/2/1975South Dakota: -16 Deerfield 4/3/1951Minnesota: -22 Karlstad 4/6/1979Wisconsin: -17 Rest Lake 4/1/1923Michigan: -17 Champion Van Riper Park 4/4/1954 (official), Bergland -34 4/1/1923 (unofficial)New York: -24 North Lake 4/1/1923Vermont: -13 Mt Mansfield 4/7/1982New Hampshire: -20 Mt Washington 4/5/1995Maine: -14 Clayton Lake 4/2/1964 BC: -31 Smith River 4/1/1954Alberta: -38 Peace River 4/2/1954Saskatchewan: -40 Key Lake 4/1/1996Manitoba: -35 Port Nelson 4/14/1923Ontario: -35 Hornepayne 4/2/1932Quebec: -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. 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 12, 2017 Report Share Posted September 12, 2017 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. 2 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 15, 2017 Report Share Posted September 15, 2017 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 2 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 17, 2017 Report Share Posted September 17, 2017 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.infoplease.com/science-health/weather/maine-temperature-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. 1 Quote Link to comment Share on other sites More sharing options...
Scott Posted September 18, 2017 Author Report Share Posted September 18, 2017 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. http://images.summitpost.org/original/1007375.JPG 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 18, 2017 Report Share Posted September 18, 2017 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. http://images.summitpost.org/original/1007375.JPG Very impressive. Quote Link to comment Share on other sites More sharing options...
Black Hole Posted September 18, 2017 Report Share Posted September 18, 2017 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! Quote Winter 23-24: Total Snow (3.2") Total Ice (0.2") Coldest Low: 1F Coldest High: 5F Snow Events: 0.1" Jan 5th, 0.2" Jan 9th, 1.6" Jan 14, 0.2" (ice) Jan 22, 1.3" Feb 12 Link to comment Share on other sites More sharing options...
Phil Posted September 18, 2017 Report Share Posted September 18, 2017 Quote Live Weather Cam: https://www.youtube.com/live/KxlIo8-KVpc?si=xKLCFYWbZieAfyh6 PWS Wunderground https://www.wunderground.com/dashboard/pws/KMDBETHE62 PWS CWOP/NOAA: https://www.weather.gov/wrh/timeseries?site=F3819&hours=72 Link to comment Share on other sites More sharing options...
wx_statman Posted September 19, 2017 Report Share Posted September 19, 2017 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: 1 Quote Link to comment Share on other sites More sharing options...
BLI snowman Posted September 19, 2017 Report Share Posted September 19, 2017 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 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 19, 2017 Report Share Posted September 19, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted September 22, 2017 Report Share Posted September 22, 2017 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). 1 Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 4, 2017 Report Share Posted October 4, 2017 This is what I have for April record lows across northern tier states (as well as southern Canada)...corrections welcome. Washington: -7 Lake Keechelus 4/1/1936Oregon: -23 Meacham 4/1/1936Idaho: -22 Copper Basin 4/5/1997Montana: -33 Gates Park 4/2/2002Wyoming: -29 Lake Yellowstone 4/1/1920North Dakota: -24 Powers Lake 4/2/1975South Dakota: -16 Deerfield 4/3/1951Minnesota: -22 Karlstad 4/6/1979Wisconsin: -17 Rest Lake 4/1/1923Michigan: -17 Champion Van Riper Park 4/4/1954 (official), Bergland -34 4/1/1923 (unofficial)New York: -24 North Lake 4/1/1923Vermont: -13 Mt Mansfield 4/7/1982New Hampshire: -20 Mt Washington 4/5/1995Maine: -14 Clayton Lake 4/2/1964 BC: -31 Smith River 4/1/1954Alberta: -38 Peace River 4/2/1954Saskatchewan: -40 Key Lake 4/1/1996Manitoba: -35 Port Nelson 4/14/1923Ontario: -35 Hornepayne 4/2/1932Quebec: -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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 4, 2017 Report Share Posted October 4, 2017 So, to update the above table given all of the additions/corrections over the past year (April record lows): Washington: -7 Lake Keechelus 4/1/1936Oregon: -23 Meacham 4/1/1936Idaho: -22 Copper Basin 4/5/1997Montana: -33 Gates Park 4/2/2002Wyoming: -29 Lake Yellowstone 4/1/1920North Dakota: -24 Powers Lake 4/2/1975South Dakota: -22 Deerfield 4/2/1975Minnesota: -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 4/1/1923New York: -24 North Lake 4/1/1923Vermont: -13 Mt Mansfield 4/7/1982New Hampshire: -20 Mt Washington 4/5/1995Maine: -19 Van Buren 4/6/2015BC: -37 Dawson Creek 4/2/1954Alberta: -41 Springdale 4/2/1954Saskatchewan: -41 Carswell Lake 4/1/1982Manitoba: -36 Ruttan Lake 4/6/1982Ontario: -37 Central Patricia 4/6/1972Quebec: -35 Doucet 4/1/1923 Quote Link to comment Share on other sites More sharing options...
BLI snowman Posted October 4, 2017 Report Share Posted October 4, 2017 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. Quote Link to comment Share on other sites More sharing options...
wx_statman Posted October 4, 2017 Report Share Posted October 4, 2017 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. Quote Link to comment Share on other sites More sharing options...
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