Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 133, NWS Pittsburgh, PA

July 7, 20154 counties in Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 7, 2015, 7:58 PM EDT for 4 counties in Pennsylvania. It was in force for 32 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: Jul 7, 2015, 7:58 PM EDT (23:58 UTC)
Expired: Jul 7, 2015, 8:30 PM EDT
In force: 32 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA

The radar

The Pittsburgh radar (KPBZ), 32 km from the middle of the area, began a volume at 00:01 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, 12.0 hours before the alert went out and 37 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: 47 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 903 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 15 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 Jul 7, 7:13 PM EDT, 45 minutes earlier.

Area forecast discussion, Jul 7, 7:13 PM EDT, 45 minutes before

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Hazardous weather outlook, Jul 7, 3:05 PM EDT, 4 hours 53 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
305 PM EDT TUE JUL 7 2015

OHZ039>041-048>050-057-058-PAZ007>009-013>016-020-022-023-WVZ001-002-
081915-
TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH-
MUSKINGUM-GUERNSEY-MERCER-VENANGO-FOREST-LAWRENCE-BUTLER-CLARION-
JEFFERSON PA-BEAVER-ARMSTRONG-INDIANA-HANCOCK-BROOKE-
305 PM EDT TUE JUL 7 2015

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SHOWERS AND THUNDERSTORMS COULD PRODUCE GUSTY WINDS AND LOCALLY
HEAVY RAINFALL THIS AFTERNOON AND EVENING...WITH LOCALIZED
FLOODING IN POOR DRAINAGE AREAS POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MDZ001-OHZ059-068-069-PAZ021-029-031-073>076-WVZ003-004-012-021>023-
041-081915-
GARRETT-BELMONT-NOBLE-MONROE-ALLEGHENY-WASHINGTON-GREENE-
WESTMORELAND-WESTMORELAND RIDGES-FAYETTE-FAYETTE RIDGES-OHIO-
MARSHALL-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER-
305 PM EDT TUE JUL 7 2015

...FLASH FLOOD WATCH IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
WEDNESDAY MORNING...

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

.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.

   FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

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

   FLASH FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 7, 4:08 PM EDT, 3 hours 50 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
408 PM EDT TUE JUL 7 2015

PAZ008-009-015-072100-
VENANGO-CLARION-FOREST-
408 PM EDT TUE JUL 7 2015

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL VENANGO...FOREST
AND NORTHERN CLARION COUNTIES...

AT 407 PM EDT...A STRONG THUNDERSTORM WAS NEAR OIL CITY...MOVING
NORTHEAST AT 40 MPH.

WIND GUSTS UP TO 50 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
OIL CITY...MARIENVILLE...TIONESTA...HASSON HEIGHTS...SENECA...
WOODLAND HEIGHTS...LEEPER...FRYBURG...KELLETTVILLE...WEST HICKORY...
EAST HICKORY...STARR AND COOK FOREST STATE PARK.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4144 7896 4144 7897 4145 7899 4145 7906
      4142 7907 4142 7909 4140 7909 4138 7915
      4126 7959 4141 7973 4162 7945 4162 7895
TIME...MOT...LOC 2007Z 236DEG 36KT 4136 7963

TAX

Local storm report, Jul 7, 6:55 PM EDT, 1 hour 3 minutes before

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Local storm report, Jul 7, 7:27 PM EDT, 31 minutes before

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Special weather statement, Jul 7, 7:52 PM EDT, 6 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
Jul 7, 3:03 PM EDT	Flash Flood Watch	PBZ	Allegheny, Fayette, Greene, Washington, Westmoreland	13 hr
Jul 7, 4:08 PM EDT	Special Weather Statement	PBZ	Forest	52 min
Jul 7, 4:23 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest	37 min
Jul 7, 6:15 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	45 min
Jul 7, 6:59 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Greene, Washington	31 min
Jul 7, 7:05 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	25 min
Jul 7, 7:27 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Washington	33 min
Jul 7, 7:52 PM EDT	Special Weather Statement	PBZ	Westmoreland	38 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2015 Every severe thunderstorm warning in 2015

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.