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September 2018 Weather in the Pacific Northwest


TigerWoodsLibido

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How are the low elevation areas up there doing? I'm still at just .62in for the month.

 

 

Areas in the lowlands to the north and south of Seattle have been very wet.  And even Seattle is running above normal for September and they have been the dry spot in the rain shadow.  

 

Down south around Puyallup and Bonney Lake they have had close to 4 inches this month.   Olympia and Bellingham are running about 200% of normal rain for September.    And the area between Everett and Mt. Vernon has been extremely wet... over 4 inches in many spots as reported by people on here.

**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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We both have roughly the same annual rainfall average... and yet I have had more than 5 times as much rain as you this month.

 

Sounds like its been very different up here huh?

Much of the last year has been very north/south with precip so this just seems to follow that trend.

Springfield, Oregon regular season 2023-24 Stats:

  • Coldest high: 25F (Jan 14, 2024)
  • Coldest low: 20F (Jan 14, 2024)
  • Days with below freezing temps: 24 (Most recent: Mar 8, 2024)
  • Days with sub-40F highs: 4 (Most recent: Jan 16, 2024)
  • Total snowfall: 0.0"
  • Total ice: 2.25”
  • Last accumulating snowfall on roads: Dec 27, 2021 (1.9")
  • Last sub-freezing high: Jan 15, 2024 (27F)
  • Last White Christmas: 1990
  • Significant wind events (gusts 45+): 0

Personal Stats:

  • Last accumulating snowfall on roads: Dec 27, 2021
  • Last sub-freezing high: Jan 16, 2024 (32F)
  • Last White Christmas: 2008
  • Total snowfall since joining TheWeatherForums: 42.0"
  • Sub-freezing highs since joining TheWeatherForums: 4

 

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Yeah... the Seattle area has been shadowed pretty good this month.

 

But even Federal way has received twice as much rain as Andrew this month... and that area probably averages less than half of Andrew's annual average.  

 

But as I have mentioned, it is pretty typical for Washinginton, especially the further north you go, to be wetter than here as the rainy season typically does not set in down here until Mid-October and in some years not until early November. 

 

Snoqualmie Falls averages about 17" less rain than I do annually, yet averages slightly more rainfall in September. Which goes to show it is typical for the rains to set in up there earlier. 

 

Salem which as a 126 year period of record has only seen more than 2" in September about a dozen times. When they had over 7" in September 2013 it broke the monthly record by about 3".

 

It may end up a wetter than average month for some parts of W. Washington, but what we are seeing overall is a fairly typical transition to fall.

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Much of the last year has been very north/south with precip so this just seems to follow that trend.

 

It is very typical for fall precip to have a north/south gradient. George Taylor's Oregon climate book actually discusses this.

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Areas in the lowlands to the north and south of Seattle have been very wet.  And even Seattle is running above normal for September and they have been the dry spot in the rain shadow.  

 

Down south around Puyallup and Bonney Lake they have had close to 4 inches this month.   Olympia and Bellingham are running about 200% of normal rain for September.    And the area between Everett and Mt. Vernon has been extremely wet... over 4 inches in many spots as reported by people on here.

 

Seems like you and MossMan get rain even in a crappy pattern. Seattle area has definitely missed out on some good convection in the last week. 

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Mercer Island, 350 ft

2021-2022: 11.6", 02/21

2020-2021: 15.6"

2019-2020: ~10"

2018-2019 winter snowfall total: 29.5"

2017-2018: 9.0", 2016-2017: 14.0"

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It is very typical for fall precip to have a north/south gradient. George Taylor's Oregon climate book actually discusses this.

Same with November snow events. They are almost all Washington-based until after Thanksgiving.

Springfield, Oregon regular season 2023-24 Stats:

  • Coldest high: 25F (Jan 14, 2024)
  • Coldest low: 20F (Jan 14, 2024)
  • Days with below freezing temps: 24 (Most recent: Mar 8, 2024)
  • Days with sub-40F highs: 4 (Most recent: Jan 16, 2024)
  • Total snowfall: 0.0"
  • Total ice: 2.25”
  • Last accumulating snowfall on roads: Dec 27, 2021 (1.9")
  • Last sub-freezing high: Jan 15, 2024 (27F)
  • Last White Christmas: 1990
  • Significant wind events (gusts 45+): 0

Personal Stats:

  • Last accumulating snowfall on roads: Dec 27, 2021
  • Last sub-freezing high: Jan 16, 2024 (32F)
  • Last White Christmas: 2008
  • Total snowfall since joining TheWeatherForums: 42.0"
  • Sub-freezing highs since joining TheWeatherForums: 4

 

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My Twitter @CBBjerseys4hope

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Typical is the new unacceptable.

Reporting what has been happening. The rainy season started with a big splash up here.

 

It is what it is... not going to ignore it and pretend its still so dry up here. It is most certainly wet now.

**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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Reporting what has been happening. The rainy season started with a big splash up here.

 

It is what it is... not going to ignore it and pretend its still so dry up here. It is most certainly wet now.

 

Sure whatever, and I'm not trying to say it hasn't been wet up there. What I am saying is, it is not unusual for the rainy season to start a few weeks earlier in NW Washington, in fact that is quite typical. The fact the rainy season has arrived about the same time in the Willamette Valley as it has in N. Washington the past few years shows the atypical fall progression we have seen really since about 2012. Even the wet Septembers of 2013 and 2017 were atypical in that they effected the entire region.

Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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I don't think fall normally sets in much earlier in western WA than western OR. It's only a small difference this time of year.

 

For example, SEA averages about .20" more in Sep than PDX, about the same difference as July and August. SEA averages less rain than PDX in May and June.

 

Overall, if you compare all the long term stations for Seattle to the ones for Portland, there is very little difference in precip for Sep/Oct between the two cities. The same applies to SLE.

 

For EUG, there is more of a difference, with Sep/Oct representing a significantly smaller percentage of their annual rainfall compared to areas further north.

 

In general, the main difference between the north and south of the PNW lowlands in precip is the northern areas are not quite as dry in the dry season, and they are drier in the wet season.

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It is very typical for fall precip to have a north/south gradient. George Taylor's Oregon climate book actually discusses this.

 

I don't see much evidence for this, at least north of EUG. Most I-5 stations from SLE to BLI have pretty similar averages for Sep/Oct rainfall.

 

Regardless, there has definitely been an atypical pattern of the northern lowlands being wetter (compared to average) than the southern lowlands for most of the past year. Tim is correct about that.

A forum for the end of the world.

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Seems like you and MossMan get rain even in a crappy pattern. Seattle area has definitely missed out on some good convection in the last week. 

 

The rain shadow is obviously built into the averages... but yet here we are again in September with areas to the north and east of Seattle running way above their average.    And this map will be even more impressive when it updates at noon today to include the weekend rain.   My area received 10 times as much rain as SEA yesterday.    If that was normal then my area would average about 400 inches of rain per year!     It does not.

 

anomimage_2.gif

**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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Seems like you and MossMan get rain even in a crappy pattern. Seattle area has definitely missed out on some good convection in the last week.

 

And I’m on the southern edge of the shadow that seems to kill any potential fun. Too many times have I seen these beautiful echoes on the radar heading my way only to fall apart over my area but South Tacoma, Puyallup and Bonney lake get the goods.

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12z GFS was much wetter down here with the Friday system and almost non-existent with the system early next week. 

Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Another 28 this morning. Would like to see some different numbers instead of the same one every morning. :P

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Ashland, KY Weather

'23-'24 Winter

Snowfall - 5.50"
First freeze: 11/1 (32)
Minimum: 2 on 1/17

Measurable snows: 4
Max 1 day snow: 3" (1/19)

Thunders: 11
1/27, 1/28, 2/10, 2/22, 2/27, 2/28, 3/5, 3/6, 3/14, 3/15
3/26, 

-------------------------------------------------------
[Klamath Falls, OR 2010 to 2021]
https://imgur.com/SuGTijl

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I don't see much evidence for this, at least north of EUG. Most I-5 stations from SLE to BLI have pretty similar averages for Sep/Oct rainfall.

 

Regardless, there has definitely been an atypical pattern of the northern lowlands being wetter (compared to average) than the southern lowlands for most of the past year.

 

There's definitely a noticeable difference from north to south across WA in late summer and early fall for precip intensity. It lessens as October goes along until things about even out towards the end of the month.

 

Take Clearbrook versus Battle Ground. Clearbrook averages 46.71" of precip annually while Battle Ground is wetter at 51.13". Yet in September, Clearbrook sees 2.98" on average to Battle Ground's 2.25". October has less of a disparity at 4.97" to Battle Ground's 4.47". And by November, Battle Ground is easily wetter again at 6.17" to 7.42".

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Springfield, Oregon regular season 2023-24 Stats:

  • Coldest high: 25F (Jan 14, 2024)
  • Coldest low: 20F (Jan 14, 2024)
  • Days with below freezing temps: 24 (Most recent: Mar 8, 2024)
  • Days with sub-40F highs: 4 (Most recent: Jan 16, 2024)
  • Total snowfall: 0.0"
  • Total ice: 2.25”
  • Last accumulating snowfall on roads: Dec 27, 2021 (1.9")
  • Last sub-freezing high: Jan 15, 2024 (27F)
  • Last White Christmas: 1990
  • Significant wind events (gusts 45+): 0

Personal Stats:

  • Last accumulating snowfall on roads: Dec 27, 2021
  • Last sub-freezing high: Jan 16, 2024 (32F)
  • Last White Christmas: 2008
  • Total snowfall since joining TheWeatherForums: 42.0"
  • Sub-freezing highs since joining TheWeatherForums: 4

 

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GoFundMe "College Basketball vs Epilepsy": gf.me/u/zk3pj2

My Twitter @CBBjerseys4hope

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I just noticed this, the forum's clock is roughly 9-10 minutes behind every other clock at home. 

Ashland, KY Weather

'23-'24 Winter

Snowfall - 5.50"
First freeze: 11/1 (32)
Minimum: 2 on 1/17

Measurable snows: 4
Max 1 day snow: 3" (1/19)

Thunders: 11
1/27, 1/28, 2/10, 2/22, 2/27, 2/28, 3/5, 3/6, 3/14, 3/15
3/26, 

-------------------------------------------------------
[Klamath Falls, OR 2010 to 2021]
https://imgur.com/SuGTijl

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I just noticed this, the forum's clock is roughly 9-10 minutes behind every other clock at home.

Any idea what that's about, Fred?

Springfield, Oregon regular season 2023-24 Stats:

  • Coldest high: 25F (Jan 14, 2024)
  • Coldest low: 20F (Jan 14, 2024)
  • Days with below freezing temps: 24 (Most recent: Mar 8, 2024)
  • Days with sub-40F highs: 4 (Most recent: Jan 16, 2024)
  • Total snowfall: 0.0"
  • Total ice: 2.25”
  • Last accumulating snowfall on roads: Dec 27, 2021 (1.9")
  • Last sub-freezing high: Jan 15, 2024 (27F)
  • Last White Christmas: 1990
  • Significant wind events (gusts 45+): 0

Personal Stats:

  • Last accumulating snowfall on roads: Dec 27, 2021
  • Last sub-freezing high: Jan 16, 2024 (32F)
  • Last White Christmas: 2008
  • Total snowfall since joining TheWeatherForums: 42.0"
  • Sub-freezing highs since joining TheWeatherForums: 4

 

Venmo

GoFundMe "College Basketball vs Epilepsy": gf.me/u/zk3pj2

My Twitter @CBBjerseys4hope

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Areas in the lowlands to the north and south of Seattle have been very wet.  And even Seattle is running above normal for September and they have been the dry spot in the rain shadow.  

 

Down south around Puyallup and Bonney Lake they have had close to 4 inches this month.   Olympia and Bellingham are running about 200% of normal rain for September.    And the area between Everett and Mt. Vernon has been extremely wet... over 4 inches in many spots as reported by people on here.

 

We will be happy to take some of that precip off your hands down here. 

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Still haven't heard the slightest thunder noise since 07/24 here. If I get none over the next month I gotta wait until probably early May if it's like most years, or if I am lucky maybe mid April. Klamath Falls ain't known for winter convection, that's a west side thing.

 

I gotta compile a statistic with # of days between last t'storm day of a year to the first of the next season going back as far as the info goes. I would bet 2018-2019 reaches somewhere close to the top.  :ph34r:

 

Why I believe my latest t'storm occurrence since 2010 was September 25th in 2014. (That's one week from now folks!)

My 2nd latest occurrence was September 17th 2013 I think. (That's today!)

2 dates came close in early October, one of them being October 5th 2011 (a flash in the distance but no noise).

Ashland, KY Weather

'23-'24 Winter

Snowfall - 5.50"
First freeze: 11/1 (32)
Minimum: 2 on 1/17

Measurable snows: 4
Max 1 day snow: 3" (1/19)

Thunders: 11
1/27, 1/28, 2/10, 2/22, 2/27, 2/28, 3/5, 3/6, 3/14, 3/15
3/26, 

-------------------------------------------------------
[Klamath Falls, OR 2010 to 2021]
https://imgur.com/SuGTijl

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Some lows in Oregon this morning

 

PDX - 50

SLE - 44

EUG - 42

TDS - 42

K-Falls - 29

BNO - 23

 

The 23 at Burns appears to have broken the daily record of 24 from 1988.

 

Beatty down in S. Central Oregon along the Sprague River hit 18 this morning. 

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Through yesterday EUG, SLE, and PDX are all running slight negative departures on the month. The greatest being -1.2 at EUG. 

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Snowfall                                  Precip

2022-23: 95.0"                      2022-23: 17.39"

2021-22: 52.6"                    2021-22: 91.46" 

2020-21: 12.0"                    2020-21: 71.59"

2019-20: 23.5"                   2019-20: 58.54"

2018-19: 63.5"                   2018-19: 66.33"

2017-18: 30.3"                   2017-18: 59.83"

2016-17: 49.2"                   2016-17: 97.58"

2015-16: 11.75"                 2015-16: 68.67"

2014-15: 3.5"
2013-14: 11.75"                  2013-14: 62.30
2012-13: 16.75"                 2012-13: 78.45  

2011-12: 98.5"                   2011-12: 92.67"

It's always sunny at Winters Hill! 
Fighting the good fight against weather evil.

 

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Really nice looking pattern. Liking the GOA ridging and the big ridge over the Eastern US. I really like our chances for a couple of big cold snaps in the Oct through Dec period.

Screw you. :)

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Through yesterday EUG, SLE, and PDX are all running slight negative departures on the month. The greatest being -1.2 at EUG. 

 

The beginning of September was warm here, now it's been consecutively running below normal. If there are no more 80's or mid 70's in the near future, may end up with a below normal month.

Ashland, KY Weather

'23-'24 Winter

Snowfall - 5.50"
First freeze: 11/1 (32)
Minimum: 2 on 1/17

Measurable snows: 4
Max 1 day snow: 3" (1/19)

Thunders: 11
1/27, 1/28, 2/10, 2/22, 2/27, 2/28, 3/5, 3/6, 3/14, 3/15
3/26, 

-------------------------------------------------------
[Klamath Falls, OR 2010 to 2021]
https://imgur.com/SuGTijl

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Some lows in Oregon this morning

 

PDX - 50

SLE - 44

EUG - 42

TDS - 42

K-Falls - 29

BNO - 23

 

The 23 at Burns appears to have broken the daily record of 24 from 1988.

 

Beatty down in S. Central Oregon along the Sprague River hit 18 this morning.

Weird that the low at PDX is being reported as 50 when there was an “hourly special” of 49.

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12Z ECMWF definitely trending toward just drenching WA and southern BC with the Friday into Saturday system... amounts look pretty sparse in Oregon. 

 

The beat goes on. 

 

Here is the total precipitation for that entire event...

 

ecmwf_precip_120_nw_25.png

**REPORTED CONDITIONS AND ANOMALIES ARE NOT MEANT TO IMPLY ANYTHING ON A REGIONAL LEVEL UNLESS SPECIFICALLY STATED**

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