Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 125, NWS Pittsburgh, PA

June 30, 2015Allegheny County, Beaver County, Washington County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 30, 2015, 5:27 PM EDT for Allegheny County, Beaver County, Washington County, Pennsylvania. It was in force for 33 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: Jun 30, 2015, 5:27 PM EDT (21:27 UTC)
Expired: Jun 30, 2015, 6:00 PM EDT
In force: 33 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Allegheny County, PA, Beaver County, PA, Washington County, PA

The radar

The Pittsburgh radar (KPBZ), 10 km from the middle of the area, began a volume at 21:30 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
Jun 30, 12:58 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 9.5 hours before the alert went out and 9 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: 38 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Jun 30, 5:14 PM EDT, 13 minutes earlier.

Area forecast discussion, Jun 30, 5:14 PM EDT, 13 minutes before

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Hazardous weather outlook, Jun 30, 2:17 PM EDT, 3 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
217 PM EDT TUE JUN 30 2015

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021>023-041-011830-
GARRETT-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-TUCKER-
217 PM EDT TUE JUN 30 2015

...SEVERE THUNDERSTORM WATCH 371 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...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.

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

   SEVERE THUNDERSTORM WATCH.

.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.

In the hours before

Special weather statement, Jun 30, 4:34 PM EDT, 53 minutes before

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Special weather statement, Jun 30, 4:55 PM EDT, 32 minutes before

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Special weather statement, Jun 30, 4:58 PM EDT, 29 minutes before

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Local storm report, Jun 30, 5:12 PM EDT, 15 minutes before

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Special weather statement, Jun 30, 5:18 PM EDT, 9 minutes before

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Local storm report, Jun 30, 5:19 PM EDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
519 PM EDT TUE JUN 30 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0425 PM     TSTM WND DMG     1 NE MOUNT EPHRAIM      39.85N  81.41W
06/30/2015                   NOBLE              OH   911 CALL CENTER

            ONE TREE REPORTED DOWN ON SENECA LAKE ROAD BETWEEN
            ROUTE 566 AND MT EPHRAIM

&&

EVENT NUMBER PBZ1502037

AMILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 1:02 PM EDT	Areal Flood Advisory	PBZ	Beaver, Butler	118 min
Jun 30, 2:58 PM EDT	Areal Flood Advisory	PBZ	Armstrong, Jefferson	2 hr
Jun 30, 4:55 PM EDT	Special Weather Statement	PBZ	Mercer	35 min
Jun 30, 5:32 PM EDT	Special Weather Statement	PBZ	Beaver	28 min
Jun 30, 5:36 PM EDT	Special Weather Statement	PBZ	Greene	39 min
Jun 30, 5:54 PM EDT	Areal Flood Advisory	PBZ	Mercer	3 hr
Jun 30, 5:56 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Butler, Westmoreland	34 min
Jun 30, 5:58 PM EDT	Special Weather Statement	PBZ	Washington	32 min
Jun 30, 6:30 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	30 min
Jun 30, 6:49 PM EDT	Special Weather Statement	PBZ	Indiana	26 min
Jun 30, 6:52 PM EDT	Areal Flood Advisory	PBZ	Allegheny, Westmoreland	3 hr
Jun 30, 7:01 PM EDT	Special Weather Statement	PBZ	Westmoreland	29 min
Jun 30, 7:27 PM EDT	Special Weather Statement	PBZ	Jefferson	33 min
Jun 30, 7:42 PM EDT	Special Weather Statement	PBZ	Fayette	18 min
Jun 30, 7:48 PM EDT	Special Weather Statement	PBZ	Forest	42 min
Jun 30, 2:38 PM EDT	Special Weather Statement	PBZ	Monroe	22 min
Jun 30, 2:44 PM EDT	Special Weather Statement	PBZ	Coshocton	31 min
Jun 30, 3:04 PM EDT	Special Weather Statement	PBZ	Coshocton	26 min
Jun 30, 3:30 PM EDT	Special Weather Statement	PBZ	Coshocton	30 min
Jun 30, 3:33 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Guernsey, Tuscarawas	27 min
Jun 30, 4:03 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Guernsey, Harrison, Tuscarawas	27 min
Jun 30, 4:14 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey, Noble	31 min
Jun 30, 4:31 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana, Harrison, Jefferson	29 min
Jun 30, 4:34 PM EDT	Special Weather Statement	PBZ	Monroe	26 min
Jun 30, 4:57 PM EDT	Areal Flood Advisory	PBZ	Columbiana	3 hr
Jun 30, 4:58 PM EDT	Special Weather Statement	PBZ	Hancock	32 min
Jun 30, 5:18 PM EDT	Special Weather Statement	PBZ	Hancock	27 min
Jun 30, 6:47 PM EDT	Special Weather Statement	PBZ	Monongalia	43 min
Jun 30, 7:20 PM EDT	Special Weather Statement	PBZ	Preston	40 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.