Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 31, NWS Pittsburgh, PA

May 10, 2013Fayette County, Westmoreland County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 10, 2013, 5:50 PM EDT for Fayette County, Westmoreland County, Pennsylvania. It was in force for 40 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: May 10, 2013, 5:50 PM EDT (21:50 UTC)
Expired: May 10, 2013, 6:30 PM EDT
In force: 40 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Fayette County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 73 km from the middle of the area, began a volume at 21:54 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 (KPIT), launched 12:00Z, 9.8 hours before the alert went out and 57 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 22 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 949 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 10, 4:53 PM EDT, 57 minutes earlier.

Area forecast discussion, May 10, 4:53 PM EDT, 57 minutes before

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Hazardous weather outlook, May 10, 2:52 PM EDT, 2 hours 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
252 PM EDT FRI MAY 10 2013

OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-029-
031-073>076-WVZ001>004-012-021>023-111900-
TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH-
MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST-
LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG-
INDIANA-WASHINGTON-GREENE-WESTMORELAND-WESTMORELAND RIDGES-FAYETTE-
FAYETTE RIDGES-HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION-MONONGALIA-
PRESTON-
252 PM EDT FRI MAY 10 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST
PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL
PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF
WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
THIS EVENING. THE PRIMARY THREAT IS DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

FROST IS POSSIBLE AT DAWN MONDAY AND TUESDAY WITH CANADIAN AIR
BUILDING INTO THE AREA. THOSE WITH SENSITIVE PLANTS NEED TO MONITOR
FUTURE FORECASTS TO DETERMINE IF ACTION IS REQUIRED.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MDZ001-WVZ041-111900-
GARRETT-TUCKER-
252 PM EDT FRI MAY 10 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND AND NORTHERN
WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
THIS EVENING. THE PRIMARY THREAT IS DAMAGING WIND GUSTS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, May 10, 4:40 PM EDT, 1 hour 10 minutes before

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Local storm report, May 10, 5:20 PM EDT, 30 minutes before

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Local storm report, May 10, 5:26 PM EDT, 24 minutes before

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Local storm report, May 10, 5:40 PM EDT, 10 minutes before

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Local storm report, May 10, 5:41 PM EDT, 9 minutes before

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Local storm report, May 10, 5:50 PM EDT, 0 minutes before

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The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 3:44 PM EDT	Special Weather Statement	PBZ	Allegheny, Beaver, Washington	61 min
May 10, 3:52 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	38 min
May 10, 4:40 PM EDT	Special Weather Statement	PBZ	Armstrong, Butler, Clarion, Jefferson, Lawrence, Mercer and 1 more	65 min
May 10, 4:43 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Venango	47 min
May 10, 4:51 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Jefferson	39 min
May 10, 6:08 PM EDT	Special Weather Statement	PBZ	Indiana, Jefferson	37 min
May 10, 2:43 PM EDT	Special Weather Statement	PBZ	Belmont, Guernsey, Harrison	62 min
May 10, 3:02 PM EDT	Special Weather Statement	PBZ	Coshocton, Guernsey, Muskingum, Noble	58 min
May 10, 4:16 PM EDT	Special Weather Statement	PBZ	Belmont, Harrison, Jefferson	29 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Every severe thunderstorm warning in 2013

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.