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Pittsburgh/Western PA WINTER ‘25/‘26


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Still up just perusing but looks like a good 10”+ for the area. Glad to have a warning this close - tired of WAA’s this is a win in my book no matter how it plays out - how many times have we gotten a WWA and 100 miles each way get hammered. Glad to be splitting the difference. Just enjoy it, take it in and live the moment. 

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NBM is finally working again.  Average precip on the 1 UTC run is 0.88" equating to a mean of 11.4" of snow.  Spread is 11 to 15 between Saturday and Sunday.  70% chance of >12", 96% chance of >8" (which is somewhat nutty).

  • That's all at PIT; odds are slightly better at AGC, actually, because of the presumably better rates.  74% and 97%, respectively.
  • Non-snow peak odds are later on Sunday at 11% chance of rain compared to 78% chance of snow.  I'm guessing that's picked up mostly by the group of mesos that are showing a warm tongue/small dry slot.

I still don't like how close the primary comes to our area.  Typically, when that does happen, we change over south of the city.  The thermal profiles on all the models check out, but I guess it depends how much you trust them to handle the microclimate.

  • Bufkits for NAM and GFS are all snow at AGC.  Between 10" and 13" depending on the run.  Ratios aren't great, so any improvement there means more accumulation.
  • 0Z NAM actually barely gets above 10:1 the entire duration.  Max is 12:1 except for a brief period of 21:1 at the tail end on 1.33" of QPF (high).  That's why storm total is "only" twelve inches.

If I had to do a first call, I'd probably go a little conservative on the southern regions of Allegheny, Washington, Greene, and Fayette (Mon Valley): 8" to 14" - 6" to 8" at MGW, less points south - 10" to 14" city points north.

  • Any mesoscale banding that takes place has a significant impact on localized totals because of convergence and associated divergence.  Could see lollipops of 16" somewhere in the coverage area.
  • It's arguably low for city-south, but perhaps I'm paranoid.  Too many years in MGW.  I might adjust that upward tomorrow as more mesos come into confidence range.  I think closer to the 8" figure if there's mix/sleet, closer to 14" if there's a clean hit.
  • I still don't necessarily trust the models on thermals assuming the northern progression of the primary low is correct.  I'll revisit this thought after the storm.

Anyway, just my word vomit.  It's 3 AM, give me a break!

 :sled:

 

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Years ago, before I met my late wife and moved to South Park, and later Bethel Park, I grew up and lived in Westmoreland County. If you know where New Stanton is, about 5 or 10 minutes from there. Usually when a big storm like this would hit the area, I would almost always get more snow, and usually quite a bit more, than Pittsburgh and Allegheny County. After moving to the South Hills, and storms hit, my parents would always tell me they got more than me. Looks like here is one rare instance where I may get more than them for a change IF that warmer air gets to them and cuts their totals down some.

Sent from my SM-S931U using Tapatalk

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