Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 126, NWS Pittsburgh, PA

June 30, 2015Allegheny County, Butler County, Westmoreland County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 30, 2015, 5:56 PM EDT for Allegheny County, Butler County, Westmoreland County, Pennsylvania. It was in force for 34 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, 5:56 PM EDT (21:56 UTC)
Expired
Jun 30, 2015, 6:30 PM EDT
In force
34 min
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Allegheny County, PA, Butler County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 37 km from the middle of the area, began a volume at 21:56 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.

IssuedProductOfficeLasted
Jun 30, 12:58 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 9.9 hours before the alert went out and 32 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-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2015-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2015-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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, 42 minutes earlier.

Area forecast discussion, Jun 30, 5:14 PM EDT, 42 minutes before
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Hazardous weather outlook, Jun 30, 2:17 PM EDT, 3 hours 39 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, 4:58 PM EDT, 58 minutes before
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Local storm report, Jun 30, 5:12 PM EDT, 44 minutes before
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Special weather statement, Jun 30, 5:18 PM EDT, 38 minutes before
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Local storm report, Jun 30, 5:19 PM EDT, 37 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
Special weather statement, Jun 30, 5:32 PM EDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
532 PM EDT TUE JUN 30 2015

PAZ013-014-020-302200-
LAWRENCE-BUTLER-BEAVER-
532 PM EDT TUE JUN 30 2015

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN BEAVER...SOUTHWESTERN
BUTLER AND SOUTHEASTERN LAWRENCE COUNTIES...

AT 532 PM EDT...A STRONG THUNDERSTORM WAS OVER OHIOVILLE...OR NEAR
BEAVER FALLS...MOVING EAST AT 35 MPH.

WINDS IN EXCESS OF 40 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
CRANBERRY...BEAVER FALLS...MONACA...ECONOMY...ELLWOOD CITY...NEW
BRIGHTON...BEAVER...ZELIENOPLE...ROCHESTER...OHIOVILLE...SEVEN
FIELDS...MIDLAND...INDUSTRY...EVANS CITY...MARS...SHIPPINGPORT...
PATTERSON TOWNSHIP...CONWAY...BIG BEAVER AND FREEDOM.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
  PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 11 AND 28.
  INTERSTATE 79 IN PENNSYLVANIA BETWEEN MILE MARKERS 78 AND 95.
  INTERSTATE 376 IN PENNSYLVANIA BETWEEN MILE MARKERS 31 AND 40.

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

LAT...LON 4093 8007 4068 7995 4067 8015 4063 8047
      4068 8052 4077 8052
TIME...MOT...LOC 2132Z 251DEG 29KT 4071 8043

24
Special weather statement, Jun 30, 5:36 PM EDT, 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
536 PM EDT TUE JUN 30 2015

OHZ069-PAZ031-075-WVZ004-012-021-022-302215-
MONROE-GREENE-FAYETTE-MARION-MARSHALL-WETZEL-MONONGALIA-
536 PM EDT TUE JUN 30 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE AREA...

AT 536 PM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM 6 MILES WEST OF FAIRVIEW TO NEAR MIDDLEBOURNE.
MOVEMENT WAS EAST AT 50 MPH.

WIND GUSTS UP TO 50 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE...
MORGANTOWN...FAIRMONT...NEW MARTINSVILLE...WAYNESBURG...WESTOVER...
MANNINGTON...STAR CITY...PLEASANT VALLEY...PADEN CITY...WINFIELD...
FREDERICKTOWN-MILLSBORO...JEFFERSON BORO...FAIRDALE...BARRACKVILLE...
MONONGAH...GRANVILLE...PINE GROVE...FAIRVIEW...HUNDRED AND
JACKSONBURG.

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

LAT...LON 3948 8067 3947 8071 3955 8079 3956 8082
      3960 8085 3958 8088 3960 8096 3980 8099
      4001 8017 3999 8013 4001 8006 3997 8004
      3999 7999 4001 7999 4001 7996 3947 7990
      3943 8027 3947 8049 3943 8054
TIME...MOT...LOC 2136Z 256DEG 49KT 3975 8091 3944 8087

07

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 1:02 PM EDTAreal Flood AdvisoryPBZBeaver, Butler118 min
Jun 30, 2:58 PM EDTAreal Flood AdvisoryPBZArmstrong, Jefferson2 hr
Jun 30, 4:55 PM EDTSpecial Weather StatementPBZMercer35 min
Jun 30, 5:27 PM EDTSevere Thunderstorm WarningPBZAllegheny, Beaver, Washington33 min
Jun 30, 5:32 PM EDTSpecial Weather StatementPBZBeaver28 min
Jun 30, 5:36 PM EDTSpecial Weather StatementPBZGreene39 min
Jun 30, 5:54 PM EDTAreal Flood AdvisoryPBZMercer3 hr
Jun 30, 5:58 PM EDTSpecial Weather StatementPBZWashington32 min
Jun 30, 6:30 PM EDTSevere Thunderstorm WarningPBZAllegheny, Westmoreland30 min
Jun 30, 6:49 PM EDTSpecial Weather StatementPBZIndiana26 min
Jun 30, 6:52 PM EDTAreal Flood AdvisoryPBZAllegheny, Westmoreland3 hr
Jun 30, 7:01 PM EDTSpecial Weather StatementPBZWestmoreland29 min
Jun 30, 7:27 PM EDTSpecial Weather StatementPBZJefferson33 min
Jun 30, 7:42 PM EDTSpecial Weather StatementPBZFayette18 min
Jun 30, 7:48 PM EDTSpecial Weather StatementPBZForest42 min
Jun 30, 2:38 PM EDTSpecial Weather StatementPBZMonroe22 min
Jun 30, 2:44 PM EDTSpecial Weather StatementPBZCoshocton31 min
Jun 30, 3:04 PM EDTSpecial Weather StatementPBZCoshocton26 min
Jun 30, 3:30 PM EDTSpecial Weather StatementPBZCoshocton30 min
Jun 30, 3:33 PM EDTSevere Thunderstorm WarningPBZCoshocton, Guernsey, Tuscarawas27 min
Jun 30, 4:03 PM EDTSevere Thunderstorm WarningPBZCarroll, Guernsey, Harrison, Tuscarawas27 min
Jun 30, 4:14 PM EDTSevere Thunderstorm WarningPBZBelmont, Guernsey, Noble31 min
Jun 30, 4:31 PM EDTSevere Thunderstorm WarningPBZCarroll, Columbiana, Harrison, Jefferson29 min
Jun 30, 4:34 PM EDTSpecial Weather StatementPBZMonroe26 min
Jun 30, 4:57 PM EDTAreal Flood AdvisoryPBZColumbiana3 hr
Jun 30, 4:58 PM EDTSpecial Weather StatementPBZHancock32 min
Jun 30, 5:18 PM EDTSpecial Weather StatementPBZHancock27 min
Jun 30, 6:47 PM EDTSpecial Weather StatementPBZMonongalia43 min
Jun 30, 7:20 PM EDTSpecial Weather StatementPBZPreston40 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2015Every 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.