Alert archive / Pennsylvania / Snow Squall Warnings in 2018
Snow Squall Warning 1, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this snow squall warning at Mar 15, 2018, 10:02 AM EDT for 6 counties in Pennsylvania. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 15, 2018, 10:02 AM EDT (14:02 UTC)
- Expired
- Mar 15, 2018, 10:45 AM EDT
- In force
- 43 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
Counties Armstrong County, PA, Butler County, PA, Clarion County, PA, Forest County, PA, Mercer County, PA, Venango County, PA
The radar
The Pittsburgh radar (KPBZ), 86 km from the middle of the area, began a volume at 14:04 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 2.0 hours before the alert went out and 94 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1208 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 307 m²/s²
- 0-3 km storm-relative helicity
- 481 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this snow squall warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pittsburgh, PA wrote its last area forecast discussion before this snow squall warning went out at Mar 15, 7:45 AM EDT, 2 hours 17 minutes earlier.
Area forecast discussion, Mar 15, 7:45 AM EDT, 2 hours 17 minutes before
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</html>Hazardous weather outlook, Mar 15, 5:20 AM EDT, 4 hours 42 minutes before
Hazardous Weather Outlook National Weather Service Pittsburgh PA 520 AM EDT Thu Mar 15 2018 OHZ039>041-048>050-PAZ007>009-013>016-020>023-029-073-074-WVZ001-002- 160930- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson-Mercer- Venango-Forest-Lawrence-Butler-Clarion-Beaver-Allegheny-Armstrong- Indiana-Washington-Westmoreland-Westmoreland Ridges-Hancock-Brooke- 520 AM EDT Thu Mar 15 2018 This Hazardous Weather Outlook is for east central Ohio, northwest Pennsylvania, southwest Pennsylvania, west central Pennsylvania, western Pennsylvania, northern West Virginia and northern panhandle of West Virginia. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MDZ001-WVZ511>514-160930- Garrett-Preston-Eastern Preston-Western Tucker-Eastern Tucker- 520 AM EDT Thu Mar 15 2018 This Hazardous Weather Outlook is for western Maryland and northern West Virginia. .DAY ONE...Today and Tonight. 1 to 3 inches of snow is expected today. If the potential for higher accumulations increase, a winter weather advisory may be needed. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. There is a slight chance of a brief period of freezing rain Saturday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. OHZ057>059-068-069-PAZ031-075-076-WVZ003-004-012-021-509-510-160930- Muskingum-Guernsey-Belmont-Noble-Monroe-Greene-Fayette- Fayette Ridges-Ohio-Marshall-Wetzel-Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston- 520 AM EDT Thu Mar 15 2018 This Hazardous Weather Outlook is for east central Ohio, southwest Pennsylvania, northern West Virginia and northern panhandle of West Virginia. .DAY ONE...Today and Tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. There is a slight chance of a brief period of freezing rain Saturday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Mar 15, 9:29 AM EDT, 33 minutes before
Special Weather Statement
National Weather Service Pittsburgh PA
929 AM EDT THU MAR 15 2018
OHZ041-PAZ007>009-013>015-020-022-151445-
Columbiana-Armstrong-Forest-Butler-Clarion-Venango-Lawrence-Mercer-
Beaver-
929 AM EDT THU MAR 15 2018
...AN INTENSE SNOW SQUALL WILL AFFECT NORTHEASTERN COLUMBIANA...
MERCER...NORTHEASTERN BEAVER...VENANGO...LAWRENCE...BUTLER...
NORTHWESTERN ARMSTRONG...WESTERN CLARION AND WESTERN FOREST
COUNTIES...
At 928 AM EDT, an intense snow squall was located along a line
extending from Meadville to 7 miles northeast of Hermitage to near
Boardman. Movement was east at 30 mph. If this squall intensifies
further, a Snow Squall Warning may be needed.
Locations impacted include...
New Castle... Hermitage...
Butler... Oil City...
Grove City... Franklin...
Knox... Ellwood City...
Homeacre-Lyndora... Sugarcreek...
Shanor-Northvue... Meridian...
This includes the following highways...
Pennsylvania Turnpike between mile markers 1 and 6.
Interstate 79 in Pennsylvania between mile markers 60 and 109.
Interstate 80 in Pennsylvania between mile markers 2 and 60.
Use caution if you must travel through this squall. Rapid changes in
visibility and road conditions are likely to lead to accidents.
Consider delaying travel until the squall passes.
LAT...LON 4118 7942 4075 7980 4090 8057 4090 8052
4114 8052 4149 8029 4149 8000 4162 7983
4163 7924
TIME...MOT...LOC 1328Z 278DEG 27KT 4166 8011 4128 8033 4098 8058The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 15, 9:29 AM EDT | Special Weather Statement | PBZ | Butler, Clarion, Lawrence, Mercer, Venango | 76 min |
| Mar 15, 10:44 AM EDT | Snow Squall Warning | PBZ | Clarion, Forest, Jefferson, Venango | 46 min |
| Mar 15, 11:18 AM EDT | Special Weather Statement | PBZ | Indiana, Jefferson | 42 min |
Nearby
Snow Squall Warnings in Pennsylvania, 2018Every snow squall warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.