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Pittsburgh/Western PA Winter 2024-2025 Thread


Rd9108
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Looks like the coldest of any ASOS/AWOS site was Zelienople (KPJC). A very efficient site for radiational cooling. Unlike most larger airports and airfields, this one is located in a small valley. Coldest temperature was -16.6F, or rounded to -17F, which was observed for several hours. The AWOS does not report minimum temperature, so it may have been even lower in between 15 minute observations.

Link: National Weather Service

Washington County Airport (KAFJ) reached -16F. Another spot for good radiational cooling.

Link: National Weather Service

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I saw some PWS’s around me in the -14 to -17 range. Zeli is also about 7 or 8 miles away. Impressive cold!

Today is looking like the first day of the month with zero snow. Would love to land a widespread big storm. A couple moderate ones so far, but they have been dissecting the area. 

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17 hours ago, PghPirates27 said:

Any snow on the horizon over the next 7 days?  Looks like we are eventually going to warm up into the mid-30's for a while. Hope we don't get rained out.

The pattern is relaxing, I'd expect temperatures to fluctuate but not deviate to far from normal one way or the other after this weekend. Only little shots at snow over the next 7, less than inch type deals. The next bigger storm threat window looking like its associated with that cutoff low in the SW US over California and when it ejects out and how, ie does it come out all in one piece, or multiple little ones. 

ecmwf_z500aNorm_namer_37.thumb.png.f741fe93da674764ac2830d6671a0399.png

GFS and Euro at 00z show it starting to move next week and possibly affect our area by next weekend (Feb 1 - 2) but of course this is all subject to change every 6 hours. The NAO and AO are positive so there isn't any blocking to hold cold air in place so its going to need to be well timed with a northern stream vort re-enforcing the cold or a decent high funneling cold in. This setup is more likely to result in a mixed precipitation type event (slop storm as we call them) as there is a pretty narrow path to all snow given all the things that would need to go right. After the last couple weeks of really maximizing a pretty dry pattern I wouldn't mind a mixed event if its more frozen than wet but we also don't have to stress over a couple tenths of qpf being the max upside.

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13 hours ago, RitualOfTheTrout said:

Light snow falling, pretty sure a trace was observed yesterday, so the streak continues!

Yes, they did register a trace on Wednesday, although it's not clear when that fell from the hourly observations. Must have been brief. Wasn't sure if it would snow today, but there are flurries flying here. Nothing at PIT. But it's of no consequence since the snow showers yesterday extended past midnight, so the streak has already continued through today.

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Just now, TheClimateChanger said:

If the month ended today, it would be 4th driest & 10th coldest on record.  Precipitation looks minimal this week, so likely to finish among the Top 10 driest Januarys. Temperatures looks somewhat milder, so we will probably fall in the rankings for coldest Januarys.

These are for Pittsburgh, to be clear.

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2 hours ago, Ahoff said:

Patterns looks to be ending soon.  Wonder if it will come back.  My worry is it will return in the Spring and delay the start.

Looks like there will be a brief warmup followed by us going into favorable phases again. So I fully expect winter to return. If you are looking for the next snow opportunity then next weekend is the next possible chance. Depending on how much the cold presses will determine if we get anything. After that is the warmup followed by phase 8 of the MJO. 

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On 1/26/2025 at 10:56 AM, Rd9108 said:

Looks like there will be a brief warmup followed by us going into favorable phases again. So I fully expect winter to return. If you are looking for the next snow opportunity then next weekend is the next possible chance. Depending on how much the cold presses will determine if we get anything. After that is the warmup followed by phase 8 of the MJO. 

I've been keeping an eye on the MJO forecasts, and its definitely been verifying at a little higher amplitude than what was forecast a few days prior. Now it looks to (albeit still relatively quickly and weakly) traverse through phases 5-6-7, its not a surprise that the upcoming "warm" period looks a little more hostile in terms of the SER and storm tracks being a bit further North. Still not a no hope setup for snow, but given we won't be building any kind of snow pack, I'll certainly have less interest in little 1-2 inch possibilities. I still think mix events will be more likely than all snow and temperatures will be much more variable, but not straying super far from normal in any given day.

Hopefully we get one more reload for the last 2 weeks of Feb into March, that still seems likely but as we know nothing is a guarantee in this hobby. 

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