Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 20, NWS Pittsburgh, PA

May 14, 2014Clarion County, Mercer County, Venango County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 14, 2014, 7:57 PM EDT for Clarion County, Mercer County, Venango County, Pennsylvania. It was in force for 48 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 14, 2014, 7:57 PM EDT (23:57 UTC)
Expired: May 14, 2014, 8:45 PM EDT
In force: 48 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Clarion County, PA, Mercer County, PA, Venango County, PA

The radar

The Pittsburgh radar (KPBZ), 92 km from the middle of the area, began a volume at 23:56 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 14, 7:01 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 12.0 hours before the alert went out and 102 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: 10 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 999 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 77 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 14, 7:47 PM EDT, 10 minutes earlier.

Area forecast discussion, May 14, 7:47 PM EDT, 10 minutes before

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Hazardous weather outlook, May 14, 2:15 PM EDT, 5 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
215 PM EDT WED MAY 14 2014

MDZ001-PAZ007>009-013>016-020>023-029-031-073>076-WVZ001>004-012-
021>023-041-151815-
GARRETT-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-TUCKER-
215 PM EDT WED MAY 14 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...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 TODAY AND TONIGHT.
THE PRIMARY SEVERE RISK IS FROM DAMAGING WIND GUSTS AND HAIL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

HEAVY RAIN IS EXPECTED ON THURSDAY AND THURSDAY NIGHT WITH A CROSSING
COLD FRONT. SIGNIFICANT RISES ON CREEKS ARE POSSIBLE...AND A FLOOD
WATCH MAY BE NEEDED.

.SPOTTER INFORMATION STATEMENT...

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

OHZ039>041-048>050-057>059-068-069-151815-
TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH-
MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-
215 PM EDT WED MAY 14 2014

...TORNADO WATCH 155 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   TORNADO WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

HEAVY RAIN IS EXPECTED ON THURSDAY AND THURSDAY NIGHT WITH A CROSSING
COLD FRONT. SIGNIFICANT RISES ON CREEKS ARE POSSIBLE...AND A FLOOD
WATCH MAY BE NEEDED.

.SPOTTER INFORMATION STATEMENT...

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

15

In the hours before

Special weather statement, May 14, 7:17 PM EDT, 40 minutes before

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Local storm report, May 14, 7:18 PM EDT, 39 minutes before

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Local storm report, May 14, 7:35 PM EDT, 22 minutes before

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Local storm report, May 14, 7:36 PM EDT, 21 minutes before

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Local storm report, May 14, 7:44 PM EDT, 13 minutes before

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Local storm report, May 14, 7:45 PM EDT, 12 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 13, 8:58 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	47 min
May 13, 9:32 PM EDT	Special Weather Statement	PBZ	Fayette	43 min
May 14, 4:45 AM EDT	Areal Flood Advisory	PBZ	Mercer	4 hr
May 14, 1:33 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	27 min
May 14, 3:16 PM EDT	Special Weather Statement	PBZ	Armstrong	59 min
May 14, 6:54 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence, Washington	66 min
May 14, 7:08 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence, Mercer	52 min
May 14, 7:40 PM EDT	Flash Flood Watch	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more	30 hr
May 14, 2:52 AM EDT	Areal Flood Advisory	PBZ	Guernsey	6 hr
May 14, 2:43 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Muskingum	47 min
May 14, 3:28 PM EDT	Special Weather Statement	PBZ	Coshocton, Tuscarawas	47 min
May 14, 3:31 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Tuscarawas	44 min
May 14, 4:21 PM EDT	Special Weather Statement	PBZ	Coshocton	39 min
May 14, 4:58 PM EDT	Severe Thunderstorm Warning	PBZ	Tuscarawas	47 min
May 14, 5:43 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana	62 min
May 14, 5:51 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Monroe	39 min
May 14, 6:27 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Harrison, Jefferson	48 min
May 14, 6:42 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Monroe	48 min
May 14, 7:26 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Harrison, Jefferson, Monroe	49 min
May 14, 7:29 PM EDT	Severe Thunderstorm Warning	PBZ	Muskingum	46 min
May 13, 8:41 PM EDT	Special Weather Statement	PBZ	Marion, Monongalia	64 min
May 14, 11:58 AM EDT	Special Weather Statement	PBZ	Preston	32 min
May 14, 12:52 PM EDT	Special Weather Statement	PBZ	Preston	23 min
May 14, 1:20 PM EDT	Flash Flood Warning	PBZ	Preston	3 hr
May 14, 2:51 PM EDT	Special Weather Statement	PBZ	Tucker	114 min
May 14, 3:37 PM EDT	Flash Flood Warning	PBZ	Tucker	3 hr
May 14, 7:17 PM EDT	Special Weather Statement	PBZ	Marion, Monongalia	58 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2014 Every severe thunderstorm warning in 2014

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.