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Wake Me Up When September Ends..Obs/Diso


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On 9/22/2023 at 1:42 PM, tamarack said:

Case in point:  January 2023.  It was the mildest of 25 Januarys here, 1.7° above the previous "winner", 2006.  It also was 3rd snowiest, only 0.1" shy of 30" and 10" AN.

39 this morning, 1st sub-40 of the season.  (Median date for 1st frost was last Tuesday.  50/50 chance of being our 3rd September w/o a frost.)

 

On 9/22/2023 at 1:47 PM, dryslot said:

Just going by the end of today's 12z GFS run, Taking it verbatim, I think we would hold off until around the 8th of Oct as there is a cold air mass that was heading SE out of Canada in that time frame into here.

 

2 hours ago, dendrite said:

That's a quick end to summer on the fantasyland gfs.

No changes.

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1 hour ago, weatherwiz said:

Only thing that could keep temps back Tuesday is we should develop quite a bit of fair cumulus clouds given steep lapse rates and pretty decent instability (especially for Oct. standards). Should have enough moisture present as well.

Cumulus?  Steep lapse rates?  We haven't had a decent TS all year and only 2 extra weak ones since June.  Would be wild getting a good one in October.  (Certainly possible.  Northern Maine had a severe storm on 9/30/1986 that flattened 600 acres of forest less than 15 miles south of Fort Kent.  Climate has warmed and we're 2.5° south of there, so why not?)

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6 minutes ago, WinterWolf said:

Enlighten us.    5” for NYC? 

More like 7-9". It's confined to a relatively small area though, and looks like a classic winter norlun through with the isobars elongated towards the NW. Those suckers can generate a ton of forcing but are notoriously fickle and hard to pin down. More often than not, the axis of the heaviest precipitation ends up a bit NE of where it was modeled. 

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