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Top 10 coldest springs from least to most extreme for PNW in the M,A,M,J periods

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#1
WeatherArchive

Posted 01 April 2018 - 03:46 PM

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What are the coldest springs you know of for the PNW from least to best to look up during those months as a whole?  Do colder springs also mean lower snow levels or are they usually too dry when it is cold enough for snow below 4,000 thus not really effecting pass travel?  Does it happen very often having snow tire season extended?



#2
BLI snowman

Posted 01 April 2018 - 03:57 PM

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The ten coldest meteorological springs in the PNW on record are

 

1. 1917

2. 1955

3. 1922

4. 1896

5. 1975

6. 1899

7. 1964

8. 1920

8. 2011

10. 1933

 

The snow level does indeed tend to be lower during these types of springs.


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#3
Phil

Posted 01 April 2018 - 04:48 PM

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The ten coldest meteorological springs in the PNW on record are

1. 1917
2. 1955
3. 1922
4. 1896
5. 1975
6. 1899
7. 1964
8. 1920
8. 2011
10. 1933

The snow level does indeed tend to be lower during these types of springs.


Interesting to see 1975 on there. That’s the year currently being challenged in the Midwest for April cold records.
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#4
BLI snowman

Posted 01 April 2018 - 04:59 PM

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Interesting to see 1975 on there. That’s the year currently being challenged in the Midwest for April cold records.

 

Yeah, the cold wave at the start of April 1975 was a coast to coast monster across the northern tier.

 

SEA had 43/33 with a dusting of snow on 4/4/1975 while BOS had 37/33 with wet snow the same day, and then ORD in the middle setting a record low of 16 on the same morning.


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#5
Phil

Posted 01 April 2018 - 05:20 PM

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Yeah, the cold wave at the start of April 1975 was a coast to coast monster across the northern tier.

SEA had 43/33 with a dusting of snow on 4/4/1975 while BOS had 37/33 with wet snow the same day, and then ORD in the middle setting a record low of 16 on the same morning.


Holy moly. And here I thought this was a low wavenumber pattern.
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#6
wx_statman

Posted 01 April 2018 - 08:23 PM

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Yeah, the cold wave at the start of April 1975 was a coast to coast monster across the northern tier.

 

SEA had 43/33 with a dusting of snow on 4/4/1975 while BOS had 37/33 with wet snow the same day, and then ORD in the middle setting a record low of 16 on the same morning.

 

Lots of states set their April monthly records in 1975, like -24 in N. Dakota, -22 in S. Dakota, -17 in Nebraska, etc. Incredible cold wave. That's also the year England saw their famous June snowfall. 



#7
Scott

Posted 01 April 2018 - 09:52 PM

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Denver dropped to -2 in April 1975 as well, one of the more impressive big city readings, at least in my opinion.
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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


#8
Phil

Posted 01 April 2018 - 10:12 PM

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Definitely a lot more -PNA in 1975.

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#9
BLI snowman

Posted 01 April 2018 - 10:24 PM

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Lots of states set their April monthly records in 1975, like -24 in N. Dakota, -22 in S. Dakota, -17 in Nebraska, etc. Incredible cold wave. That's also the year England saw their famous June snowfall. 

 

Yeah, that multi-year Nina was a disappointment locally but it still produced some pretty impressive cool airmasses, especially relative to recent standards.



#10
wx_statman

Posted 02 April 2018 - 07:25 AM

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Yeah, that multi-year Nina was a disappointment locally but it still produced some pretty impressive cool airmasses, especially relative to recent standards.

 

It's interesting how similar the multi-year Nina's were in both 1973-76 and 1998-01. Both were disappointments locally, with raging +EPO at least partially to blame in both cases. But at the same time both produced a lot of impressive cold waves elsewhere.   



#11
Phil

Posted 02 April 2018 - 09:27 AM

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It's interesting how similar the multi-year Nina's were in both 1973-76 and 1998-01. Both were disappointments locally, with raging +EPO at least partially to blame in both cases. But at the same time both produced a lot of impressive cold waves elsewhere.


Looking back at ESRL reanalysis, those two periods weren’t all that different (structurally) from many of the late 19th century winters, as far as the EPO is concerned.

The one key difference appears to be a persistent blocking regime over Greenland/Hudson Bay during the 19th century, which has been largely absent from the 1970s onward.
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#12
Phil

Posted 02 April 2018 - 09:33 AM

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Taking the reanalysis as far back as it goes..note the similarity to the 1974-1976 and 1998-2001 regimes, but the stronger Hudson Bay/Greenland block, when averaged through these five year integrals.

Starting in 1875.

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#13
WeatherArchive

Posted 24 April 2018 - 02:51 PM

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The MSM is finally talking about the garbage in the ocean. It is screwing our weather up and there is plans to remove a chunk of it but it will be a multi year plan starting this summer.  Now is the testing phase to use some kind of net to scope it all up which will be deployed in August.   I am not exactly sure where they are going to take the plastics.  Dump them back in the ocean? VERY smart.   :rolleyes: https://www.google.c...BBuQQ_B0IxgEwFw

 

Since Google changed their image search recently (making a lot of users angry) not sure if it will show up properly now but that is the map of the garbage patch and it is where the path of the Humboldt Current is which is what gives us our normally cool/temperate climate. 

 

The garbage causes the ocean currents to slow/stop and get stagnated into little swirls.   That will disrupt the jet stream or make it go an easier path.  It has been a problem since the 2010s and we have had the Ridiculous Resilient Ridge more on then off since.  It won't go away till the garbage goes away. When we do fix the garbage up it will take time but the jetstream will come back with a vengeance after being messed up so long before things get more stabilized. 

 

It's bigger now then TWO Frances and there are several smaller ones scattered across other oceans but they are growing too and it is now finally clicking into people to take care of it.   I mean DUH!!!!!!!!!!!!!!!!!!



#14
Phil

Posted 24 April 2018 - 03:27 PM

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The MSM is finally talking about the garbage in the ocean. It is screwing our weather up and there is plans to remove a chunk of it but it will be a multi year plan starting this summer. Now is the testing phase to use some kind of net to scope it all up which will be deployed in August. I am not exactly sure where they are going to take the plastics. Dump them back in the ocean? VERY smart. :rolleyes: https://www.google.c...BBuQQ_B0IxgEwFw

Since Google changed their image search recently (making a lot of users angry) not sure if it will show up properly now but that is the map of the garbage patch and it is where the path of the Humboldt Current is which is what gives us our normally cool/temperate climate.

The garbage causes the ocean currents to slow/stop and get stagnated into little swirls. That will disrupt the jet stream or make it go an easier path. It has been a problem since the 2010s and we have had the Ridiculous Resilient Ridge more on then off since. It won't go away till the garbage goes away. When we do fix the garbage up it will take time but the jetstream will come back with a vengeance after being messed up so long before things get more stabilized.

It's bigger now then TWO Frances and there are several smaller ones scattered across other oceans but they are growing too and it is now finally clicking into people to take care of it. I mean DUH!!!!!!!!!!!!!!!!!!


:huh:
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