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Western Pa / Pittsburgh area Winter Discussion ❄️☃️


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GFS seems to be onto the Euro’s idea of two rounds of snow, one earlier Monday and then a larger one Monday night/Tuesday morning. Hopefully it has the right idea with the strength of the second round!

Looking ahead, the late week storm still seems to be trending east. Still mostly ice/rain on the GFS, but it’s coming into line with a more favorable path for us.

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12 minutes ago, Ahoff said:

I love this map, but I really hate being in the bullseye right now.  That's the scary part.  If this was Sunday, I'd feel good.

I won't feel good till I see 35dbz radar returns over my house Monday night lol. No, but really all the guidance has the storm and show a narrowing goal post, so I'm starting to have confidence but models have relatively dramatic changes over shorter leads than we are used to due to handling of the PV etc. thus far this season.

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I don’t understand our NWS.  Their point and click from Mon.-Tues.  is all snow, their Hazardous Weather Outlook, say mixed precip, with a chance of accumulating snow.  I understand being conservative, but geez, at least get on the same page or close to it.

On the other side TWC is bullish on this being all snow.

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.LONG TERM /MONDAY THROUGH FRIDAY/...
The sw flow over the Upper OH is forecast to continue next week with
a series of crossing shortwaves within flow defining precip chances,
the most significant indicated for Tuesday. With plentiful boundary 
layer moisture evident in relatively warmer swly flow, ascent 
provided from a northern stream open wave, assisted by coupled jet 
and coincident near sfc frontogenesis will prime the region with the 
ingredients necessary for a widespread precipitation event on 
Tuesday. 

While longer range solution output varies in terms of snow 
accumulations (GFS vs. ECMWF), a couple of considerations should be 
noted. The first is that both models indicate the location of the 
mid-level low west and north of the forecast area. With the region 
located within the warm sector, this would imply the potential for a 
wintry mix across portions of the region (especially south of I-80) 
as warm advection hinders overall snow growth efficiency and 
introduces other hazards such as sleet/freezing rain. GEFS plumes for
PIT hint at this hindrance as the operational GFS snow accumulation 
output is much higher than majority of other members. Other 
considerations include the anticipated quick progression of the storm
which implies a rather progressive, open wave in conjunction with 
anticipated dry slotting. This translates to precipitation 
diminishing rather rapidly later Tuesday. Nonetheless, hazardous 
wintry weather should be anticipated, especially early Tuesday, and 
headlines may be required. This will bear watching through the course
of the weekend with more updates to follow.
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3 minutes ago, Mailman said:

.LONG TERM /MONDAY THROUGH FRIDAY/...
The sw flow over the Upper OH is forecast to continue next week with
a series of crossing shortwaves within flow defining precip chances,
the most significant indicated for Tuesday. With plentiful boundary 
layer moisture evident in relatively warmer swly flow, ascent 
provided from a northern stream open wave, assisted by coupled jet 
and coincident near sfc frontogenesis will prime the region with the 
ingredients necessary for a widespread precipitation event on 
Tuesday. 

While longer range solution output varies in terms of snow 
accumulations (GFS vs. ECMWF), a couple of considerations should be 
noted. The first is that both models indicate the location of the 
mid-level low west and north of the forecast area. With the region 
located within the warm sector, this would imply the potential for a 
wintry mix across portions of the region (especially south of I-80) 
as warm advection hinders overall snow growth efficiency and 
introduces other hazards such as sleet/freezing rain. GEFS plumes for
PIT hint at this hindrance as the operational GFS snow accumulation 
output is much higher than majority of other members. Other 
considerations include the anticipated quick progression of the storm
which implies a rather progressive, open wave in conjunction with 
anticipated dry slotting. This translates to precipitation 
diminishing rather rapidly later Tuesday. Nonetheless, hazardous 
wintry weather should be anticipated, especially early Tuesday, and 
headlines may be required. This will bear watching through the course
of the weekend with more updates to follow.

So sounds like they are thinking far less snow.  If they think that they should update the actual forecast they put out.

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37 minutes ago, Rd9108 said:

Idk something in my gut tells me this is the type of storm that jackpots Youngstown. We haven't seen one of those this season yet. We still maybe get a few sloppy inches but the euro isn't backing down. 

Always nice to have the Euro on our side, although it seems this season, it's had larger run to run swings than in years past.

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3 minutes ago, CoraopolisWx said:

Always nice to have the Euro on our side, although it seems this season, it's had larger run to run swings than in years past.

Anecdotal, but it historically sniffs out storms that try to cut west when they are close. I’ll start feeling real good if it’s next few runs look like NAM/GFS

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Just now, Rd9108 said:

We are definitely walking a tight rope with this whole set up. We need the euro to tick back east so we can have some breathing room. 

Agreed. Don’t get me wrong, I wouldn’t complain about 13.4 when it could have been 17.3, but too close for comfort.

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