Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 45, NWS Pittsburgh, PA

June 5, 2015Armstrong County, Westmoreland County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 5, 2015, 6:20 PM EDT for Armstrong County, Westmoreland County, Pennsylvania. It was in force for 25 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 5, 2015, 6:20 PM EDT (22:20 UTC)
Expired: Jun 5, 2015, 6:45 PM EDT
In force: 25 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Armstrong County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 64 km from the middle of the area, began a volume at 22:20 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, 10.3 hours before the alert went out and 56 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: 20 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 26 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 Jun 5, 6:11 PM EDT, 9 minutes earlier.

Area forecast discussion, Jun 5, 6:11 PM EDT, 9 minutes before

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Hazardous weather outlook, Jun 5, 2:40 PM EDT, 3 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
240 PM EDT FRI JUN 5 2015

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021>023-041-061845-
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-
240 PM EDT FRI JUN 5 2015

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.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

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

DEPENDING ON THE TIMING OF A COLD FRONT...STRONG TO SEVERE
THUNDERSTORMS COULD FORM EARLY MONDAY INTO MONDAY EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jun 5, 5:11 PM EDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
511 PM EDT FRI JUN 05 2015

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

0508 PM     FLASH FLOOD      WHEELING                40.08N  80.70W
06/05/2015                   OHIO               WV   911 CALL CENTER

            IN DOWNTOWN WHEELING...MAIN STREET FLOODED WITH
            NUMEROUS VEHICLES STUCK IN WATER

&&

EVENT NUMBER PBZ1501748

24

Special weather statement, Jun 5, 5:18 PM EDT, 1 hour 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
518 PM EDT FRI JUN 5 2015

PAZ014-052200-
BUTLER-
518 PM EDT FRI JUN 5 2015

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN BUTLER COUNTY...

AT 518 PM EDT...A STRONG THUNDERSTORM WAS NEAR SLIPPERY ROCK...OR 9
MILES SOUTHEAST OF GROVE CITY...MOVING EAST AT 15 MPH.

WINDS GUSTS BETWEEN 40 AND 50 MPH AND DIME SIZE HAIL ARE POSSIBLE
WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
CHICORA...PARKER...BRUIN...WEST LIBERTY...PETROLIA...KARNS CITY...
FAIRVIEW...WEST SUNBURY AND HOOKER.

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

LAT...LON 4099 8007 4110 8001 4110 7969 4088 7969
TIME...MOT...LOC 2118Z 280DEG 13KT 4103 8000

24

Special weather statement, Jun 5, 5:23 PM EDT, 57 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
523 PM EDT FRI JUN 5 2015

PAZ029-031-075-WVZ004-052215-
WASHINGTON-GREENE-FAYETTE-MARSHALL-
523 PM EDT FRI JUN 5 2015

...A LINE OF THUNDERSTORMS WITH GUSTY WIND AND HEAVY RAIN WILL
AFFECT NORTHWESTERN FAYETTE... GREENE...SOUTHERN WASHINGTON AND
MARSHALL COUNTIES...

AT 522 PM EDT...THUNDERSTORMS WITH GUSTY WIND AND HEAVY RAIN WERE
ALONG A LINE EXTENDING FROM 6 MILES SOUTHEAST OF EAST WASHINGTON TO
POWHATAN POINT...AND MOVING EAST AT 15 MPH.

WIND GUSTS OF 40 TO 50 MPH AND RAINFALL AT THE RATE OF ONE TO TWO
INCHES PER HOUR ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
MOUNDSVILLE...WAYNESBURG...CALIFORNIA...BENTLEYVILLE...BROWNSVILLE...
FREDERICKTOWN-MILLSBORO...POWHATAN POINT...JEFFERSON BORO...
FAIRDALE...CAMERON...ISABELLA...ELLSWORTH...ROGERSVILLE...WEST
BROWNSVILLE...WEST FINLEY...ROSCOE...DEEMSTON...EIGHTY FOUR...
COKEBURG AND NEWELL.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
  INTERSTATE 70 IN PENNSYLVANIA BETWEEN MILE MARKERS 24 AND
  26...BETWEEN MILE MARKERS 32 AND 33...AND BETWEEN MILE MARKERS 36
  AND 38.
  INTERSTATE 79 IN PENNSYLVANIA BETWEEN MILE MARKERS 3 AND 21...AND
  BETWEEN MILE MARKERS 22 AND 31.
  PENNSYLVANIA ROUTE 43 BETWEEN MILE MARKERS 30 AND 35.

THE TORRENTIAL RAINFALL MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE
YOUR VEHICLE THROUGH FLOODED ROADWAYS.

LAT...LON 3972 8083 3978 8085 3980 8082 3984 8083
      3987 8079 3990 8081 3992 8078 3991 8076
      3992 8076 4017 8012 4006 7973 3975 8008
TIME...MOT...LOC 2122Z 292DEG 13KT 4012 8014 3988 8084

15

Special weather statement, Jun 5, 5:29 PM EDT, 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
529 PM EDT FRI JUN 5 2015

PAZ021-073-052200-
WESTMORELAND-ALLEGHENY-
529 PM EDT FRI JUN 5 2015

...A CLUSTER OF THUNDERSTORMS WITH GUSTY WIND AND HEAVY RAIN WILL
AFFECT SOUTHEASTERN ALLEGHENY AND WEST CENTRAL WESTMORELAND
COUNTIES...

AT 527 PM EDT...A CLUSTER OF THUNDERSTORM WAS CENTERED NEAR
PLEASANT HILLS...OR NEAR MCKEESPORT...MOVING SOUTHEAST AT 15 MPH.

WIND GUSTS OF 40 TO 45 MPH...HALF INCH HAIL...AND A RAPID HALF...TO
ONE INCH OF RAIN ARE POSSIBLE WITH THIS CLUSTER OF STORMS.

LOCATIONS IMPACTED INCLUDE...
PITTSBURGH...BETHEL PARK...MONROEVILLE...MCKEESPORT...WEST MIFFLIN...
BALDWIN...MURRYSVILLE...WILKINSBURG...WHITEHALL...SOUTH PARK
TOWNSHIP...MUNHALL...JEFFERSON HILLS...NORTH VERSAILLES...
BRENTWOOD...SWISSVALE...CASTLE SHANNON...PLEASANT HILLS...WHITE
OAK...CLAIRTON AND FOREST HILLS.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
  INTERSTATE 70 IN PENNSYLVANIA NEAR MILE MARKER 48.
  PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 58 AND 65.
  INTERSTATE 376 IN PENNSYLVANIA BETWEEN MILE MARKERS 72 AND 78.
  PENNSYLVANIA ROUTE 43 BETWEEN MILE MARKERS 50 AND 53.

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

LAT...LON 4016 7974 4023 7997 4024 7996 4024 7994
      4025 7992 4030 8006 4045 7998 4042 7966
TIME...MOT...LOC 2127Z 295DEG 12KT 4035 7995

15

Special weather statement, Jun 5, 6:02 PM EDT, 18 minutes before

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Special weather statement, Jun 5, 6:17 PM EDT, 3 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
Jun 5, 4:36 PM EDT	Special Weather Statement	PBZ	Lawrence	24 min
Jun 5, 5:18 PM EDT	Special Weather Statement	PBZ	Butler	42 min
Jun 5, 5:23 PM EDT	Special Weather Statement	PBZ	Greene	52 min
Jun 5, 5:29 PM EDT	Special Weather Statement	PBZ	Allegheny	31 min
Jun 5, 5:49 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler	26 min
Jun 5, 6:02 PM EDT	Special Weather Statement	PBZ	Westmoreland	28 min
Jun 5, 6:17 PM EDT	Special Weather Statement	PBZ	Westmoreland	28 min
Jun 5, 6:40 PM EDT	Special Weather Statement	PBZ	Fayette	50 min
Jun 5, 7:10 PM EDT	Areal Flood Advisory	PBZ	Westmoreland	2 hr
Jun 5, 7:10 PM EDT	Areal Flood Advisory	PBZ	Fayette	3 hr
Jun 5, 3:31 PM EDT	Special Weather Statement	PBZ	Jefferson	29 min
Jun 5, 4:59 PM EDT	Areal Flood Advisory	PBZ	Belmont	2 hr
Jun 5, 4:45 PM EDT	Special Weather Statement	PBZ	Ohio	15 min
Jun 5, 5:06 PM EDT	Flash Flood Warning	PBZ	Marshall, Ohio	114 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.