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September 2017 Observation & Discussion Thread


dmillz25

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14 hours ago, CIK62 said:

Next 8 days now up to 4 to 5degs. AN. (Avg. 68-69).

Could Jose be another Sandy here, around the 20th.?

Looks like low 80s here all week before the next trough heads east by the weekend, perhaps accompanied by Jose.

If we do get another cold shot around 9/20, we will need some unseasonable warmth to erase the departures from the coolest start to September since 2003. We are currently -5.6F for the month, which is a very large departure for the warm season when variations from normal tend to be in the 1-3F range. 

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On August 26, 2017 at 9:21 PM, donsutherland1 said:

9/1-10/1964:

9/1 85-65

9/2 80-58

9/3 85-60

9/4 92-63

9/5 89-66

9/6 82-59

9/7 82-58

9/8 84-63

9/9 92-63

9/10 87-66

9/11 92-63

9/12 71-58

9/13 60-53

9/14 75-48

Thank you, Don. I remember that cold morning. I should have gotten my old butt in gear and done the research myself, thank you again for your kindness.

Rich

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The cooler summer pattern which lingered into the first 10 days of September is finally changing. The summer perma-ridge over the PACNW is being replaced by a trough. This will finally allow more ridging in the East and above normal 80+ degree temps in our area. 

 

ecmwf-ens_T850aMean_namer_1.thumb.png.dfd07487c79e69aefe2fb4b4e61576ce.png

ecmwf-ens_T850aMean_namer_6.thumb.png.9bf9b710587db09a28a4e71384060979.png

 

 

 

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1 hour ago, bluewave said:

The cooler summer pattern which lingered into the first 10 days of September is finally changing. The summer perma-ridge over the PACNW is being replaced by a trough. This will finally allow more ridging in the East and above normal 80+ degree temps in our area. 

 

ecmwf-ens_T850aMean_namer_1.thumb.png.dfd07487c79e69aefe2fb4b4e61576ce.png

ecmwf-ens_T850aMean_namer_6.thumb.png.9bf9b710587db09a28a4e71384060979.png

 

 

 

It's done this before in the summer but went back.

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11 minutes ago, TriPol said:

Well, hopefully, we get a nice, warm October. Warm Octobers = cold winters.

Well we do know what happens when you get a HEC in October. That's a winter i never want to repeat. 

I think the odds of a (direct) jose impact here is extremely low. It would be the ultimate thread the needle. Maybe Atlantic Canada 

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7 hours ago, WEATHERBUFF said:

It's done this before in the summer but went back.

NYC actually finished September 1-10 as the 6th coldest since 1869. That's how impressive the ridge was over Western NOAM. With the Western trough returning, we'll see some warmer temps for a while.

59b6df07087be_Screenshot2017-09-11at2_58_57PM.png.0e78b41f3d56daf83cf43c427798a14c.png

 

 

 

 

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10 hours ago, Morris said:

Coolest in a century. Wow!

One of the more impressive cool records here since February 2015. The only way we have been able to get cool here in the 2010's is to have some record blocking ridge like we just came off of over Western NOAM this summer. The EPS drops the trough into the Western US into later September. We then wait to see what happens in October as last year it was a preview of the winter Pacific pattern.

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