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Western Pa / Pittsburgh area Winter Discussion ❄️☃️


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Special Weather Statement
for Allegheny County

Issued by National Weather Service
Pittsburgh, PA
3:43 PM EST Wed, Dec 16, 2020

...AN AREA OF HEAVY SNOW WILL AFFECT JEFFERSON...EASTERN COLUMBIANA...NORTHEASTERN BELMONT...BEAVER...VENANGO...BUTLER... ALLEGHENY...NORTHWESTERN GREENE...WESTERN ARMSTRONG...WESTERN CLARION...NORTHWESTERN FAYETTE...WESTERN FOREST...MERCER... WASHINGTON...LAWRENCE...SOUTHWESTERN INDIANA...WESTERN WESTMORELAND...OHIO...MARSHALL...BROOKE AND HANCOCK COUNTIES...

At 341 PM EST, an area of heavy snow was located along a line extending from near Leetonia to Bellaire. Movement was east at 30 mph with a quick 1-2 inch accumulation expected within the next 2 hours. If traveling on interstates, use caution.

 Locations impacted include... Pittsburgh...                     Penn Hills... Mount Lebanon...                  Bethel Park... Ross Township...                  Wheeling... McCandless Township...            Monroeville... Cranberry...                      Moon Township... New Castle...                     McMurray...

This includes the following highways... Interstate 70 in Ohio between mile markers 222 and 225. Interstate 70 in West Virginia between mile markers 0 and 14. Interstate 70 in Pennsylvania between mile markers 0 and 57. Pennsylvania Turnpike between mile markers 1 and 84. Interstate 79 in Pennsylvania between mile markers 21 and 138. Interstate 80 in Pennsylvania between mile markers 0 and 61. Interstate 376 in Pennsylvania between mile markers 4 and 84.

:drunk:

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.NEAR TERM /THROUGH THURSDAY/...
The eve update generally involved some cosmetic adjustments as 
widespread snow continues in response to an encroaching upper trough 
which features an impressive coupled jet structure. The resulting
divergence is generating a strengthening frontogenetically forced snow
band which will cross the I 79 corridor during the rush hour.

Otherwise expect variable snow intensity and flake size until mid
level dry slot encroachment in the predawn of Thursday. That process
with declining omega values/ascent parameters will signal the end of
accumulating snow potential. Patchy freezing drizzle will linger, but
ice accumlation greater than a trace is not anticipated in that time
frame.

No changes were made to warning and advisory headlines.
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Winter Storm Warning

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pittsburgh PA
421 PM EST Wed Dec 16 2020

PAZ009-014>016-020>022-029-031-073-075-WVZ012-021-509-170530-
/O.CON.KPBZ.WS.W.0004.000000T0000Z-201217T1200Z/
Forest-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong-
Washington-Greene-Westmoreland-Fayette-Wetzel-Marion-Monongalia-
Including the cities of Tionesta, Butler, Clarion, Punxsutawney,
Brookville, Aliquippa, Beaver Falls, Ambridge, Monaca,
Pittsburgh Metro Area, Kittanning, Ford City, Washington,
Canonsburg, Waynesburg, Murrysville, Greensburg, New Kensington,
Lower Burrell, Latrobe, Monessen, Uniontown, New Martinsville,
Fairmont, and Morgantown
421 PM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM EST
THURSDAY...

* WHAT...Snow expected. Additional snow accumulation ranging from
  2 to 5 inches.

* WHERE...Portions of northwest, southwest and western
  Pennsylvania and northern West Virginia.

* WHEN...Through 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the morning or evening commute.

* ADDITIONAL DETAILS...Areas of freezing drizzle are likely to
  develop late tonight. A light glaze of ice is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
Please report snow or ice by calling 412-262-1988, posting to the
NWS Pittsburgh Facebook page, or using Twitter @NWSPittsburgh

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadway and traffic
conditions.

&&

$$

 

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9 hours ago, KPITSnow said:

The 6z euro continues the trend of cutting back...kuchera totals are 7-8 inches in AGC (had been over 10 forever) and that means 10:1 are likely closer to 6. 
 

given how bad the HRRR is I just don’t think this event is going to go well give how everything has been trending. Plus, Climo...it always wins out here.

edit: just saw the euro qpf map...about .6-.7 inches from west to East in the county. 
 

have to hope at this point that we get lucky to get under good banding...otherwise I’ll be really happy if I just get 6 inches or more. Sticking with my 2-4...maybe 3-5.

Really  not my best work.....

  • Haha 1
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