Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 95, NWS Pittsburgh, PA

June 23, 2015Armstrong County, Clarion County, Jefferson County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 23, 2015, 7:53 AM EDT for Armstrong County, Clarion County, Jefferson County, Pennsylvania. It was in force for 22 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 23, 2015, 7:53 AM EDT (11:53 UTC)
Expired: Jun 23, 2015, 8:15 AM EDT
In force: 22 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Armstrong County, PA, Clarion County, PA, Jefferson County, PA

The radar

The Pittsburgh radar (KPBZ), 96 km from the middle of the area, began a volume at 11:53 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 00:00Z, 11.9 hours before the alert went out and 98 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: 584 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1232 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 143 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.2

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 23, 7:50 AM EDT, 3 minutes earlier.

Area forecast discussion, Jun 23, 7:50 AM EDT, 3 minutes before

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Hazardous weather outlook, Jun 23, 3:09 AM EDT, 4 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
309 AM EDT TUE JUN 23 2015

OHZ039>041-048-PAZ007>009-013>016-020-WVZ001-240715-
TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-MERCER-VENANGO-FOREST-
LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-HANCOCK-
309 AM EDT TUE JUN 23 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...TODAY AND TONIGHT.

A ROUND OF SHOWERS AND THUNDERSTORMS IS POSSIBLE THIS
MORNING...WITH ANOTHER ROUND POSSIBLY REDEVELOPING THIS AFTERNOON.
ANY STORMS THAT DO DEVELOP WILL BE CAPABLE OF PRODUCING GUSTY
WINDS.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

MDZ001-OHZ049-050-057>059-068-069-PAZ021>023-029-031-073>076-
WVZ002>004-012-021>023-041-240715-
GARRETT-HARRISON-JEFFERSON OH-MUSKINGUM-GUERNSEY-BELMONT-NOBLE-
MONROE-ALLEGHENY-ARMSTRONG-INDIANA-WASHINGTON-GREENE-WESTMORELAND-
WESTMORELAND RIDGES-FAYETTE-FAYETTE RIDGES-BROOKE-OHIO-MARSHALL-
WETZEL-MARION-MONONGALIA-PRESTON-TUCKER-
309 AM EDT TUE JUN 23 2015

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

.DAY ONE...TODAY AND TONIGHT.

THIS IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS THIS AFTERNOON.
THE MAIN THREATS WILL BE DAMAGING WIND GUSTS AND ISOLATED LARGE
HAIL.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jun 23, 4:45 AM EDT, 3 hours 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
445 AM EDT TUE JUN 23 2015

PAZ007-008-013-230945-
VENANGO-MERCER-LAWRENCE-
445 AM EDT TUE JUN 23 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MERCER...VENANGO AND
NORTHWESTERN LAWRENCE COUNTIES...

AT 444 AM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM 7 MILES SOUTHWEST OF EDINBORO TO NEAR ORWELL TO 6
MILES SOUTHWEST OF MACEDONIA. MOVEMENT WAS SOUTHEAST AT 40 MPH.

WIND GUSTS UP TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
HERMITAGE...SHARON...OIL CITY...GROVE CITY...FRANKLIN...
SHARPSVILLE...GREENVILLE...SUGARCREEK...FARRELL...NEW WILMINGTON...
MERCER...PULASKI...HASSON HEIGHTS...STONEBORO...SENECA...WEST
MIDDLESEX...POLK...SANDY LAKE...CLARK AND WHEATLAND.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
  INTERSTATE 79 IN PENNSYLVANIA BETWEEN MILE MARKERS 111 AND 137.
  INTERSTATE 80 IN PENNSYLVANIA BETWEEN MILE MARKERS 0 AND 30.
  INTERSTATE 376 IN PENNSYLVANIA BETWEEN MILE MARKERS 4 AND 11.

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

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4144 7951 4117 8001 4104 8034 4103 8052
      4149 8052 4149 8001 4159 7985 4162 7983
      4162 7951
TIME...MOT...LOC 0844Z 301DEG 29KT 4181 8025 4150 8086 4127 8160

TAX

Special weather statement, Jun 23, 5:33 AM EDT, 2 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
533 AM EDT TUE JUN 23 2015

PAZ008-009-015-231000-
VENANGO-CLARION-FOREST-
533 AM EDT TUE JUN 23 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN VENANGO...
FOREST AND NORTHERN CLARION COUNTIES...

AT 533 AM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM NEAR ENTERPRISE TO 8 MILES NORTHEAST OF GROVE CITY TO
NEAR HERMITAGE. MOVEMENT WAS EAST AT 65 MPH.

WIND GUSTS UP TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
CLARION...MARIENVILLE...KNOX...TIONESTA...SENECA...EMLENTON...
STRATTANVILLE...CLINTONVILLE...SHIPPENVILLE...ST. PETERSBURG...
KENNERDELL...BARKEYVILLE...FOXBURG...LEEPER...KELLETTVILLE...
FRYBURG...FISHER...WEST HICKORY...CHERRY VALLEY AND EAST HICKORY.

THIS INCLUDES  INTERSTATE 80 IN PENNSYLVANIA BETWEEN MILE MARKERS 28
AND 66.

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

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4162 7896 4144 7896 4145 7906 4142 7907
      4142 7909 4133 7910 4134 7917 4133 7917
      4134 7918 4133 7921 4125 7921 4117 7933
      4112 7968 4117 7970 4117 8000 4122 8000
      4145 7958 4163 7953
TIME...MOT...LOC 0933Z 279DEG 54KT 4159 7948 4127 8002 4123 8034

TAX

Special weather statement, Jun 23, 5:57 AM EDT, 1 hour 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
557 AM EDT TUE JUN 23 2015

PAZ008-009-015-016-231100-
JEFFERSON-VENANGO-CLARION-FOREST-
557 AM EDT TUE JUN 23 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT JEFFERSON...SOUTH
CENTRAL VENANGO...EASTERN FOREST AND CLARION COUNTIES...

AT 556 AM EDT...RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE
EXTENDING FROM NEAR WETMORE TO 8 MILES NORTH OF CLARION TO 10 MILES
WEST OF KNOX. MOVEMENT WAS EAST AT 55 MPH.

WIND GUSTS UP TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
CLARION...BROOKVILLE...MARIENVILLE...KNOX...REYNOLDSVILLE...
BROCKWAY...SYKESVILLE...FALLS CREEK...SLIGO...EMLENTON...
STRATTANVILLE...SUMMERVILLE...LIMESTONE...SHIPPENVILLE...ST.
PETERSBURG...CORSICA...CALLENSBURG...SIGEL...FOXBURG AND LEEPER.

THIS INCLUDES  INTERSTATE 80 IN PENNSYLVANIA BETWEEN MILE MARKERS 37
AND 96.

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

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4120 7877 4113 7880 4101 7881 4107 7966
      4117 7970 4117 7990 4136 7941 4163 7910
      4162 7895 4144 7896 4145 7906 4142 7907
      4142 7909 4134 7909 4135 7902 4138 7897
      4126 7874 4123 7874 4123 7871 4120 7871
TIME...MOT...LOC 0956Z 285DEG 48KT 4165 7895 4133 7940 4123 7974

TAX

Special weather statement, Jun 23, 7:29 AM EDT, 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
729 AM EDT TUE JUN 23 2015

PAZ015-016-022-231200-
JEFFERSON-CLARION-ARMSTRONG-
729 AM EDT TUE JUN 23 2015

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL JEFFERSON...CENTRAL
ARMSTRONG AND SOUTHERN CLARION COUNTIES...

AT 728 AM EDT...A STRONG THUNDERSTORM WAS NEAR NEW BETHLEHEM...OR
NEAR RIMERSBURG...MOVING EAST AT 55 MPH.

WIND GUSTS UP TO 55 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
BROOKVILLE...RIMERSBURG...REYNOLDSVILLE...NEW BETHLEHEM...
SYKESVILLE...FALLS CREEK...SLIGO...BIG RUN...SUMMERVILLE...
LIMESTONE...HAWTHORN...CORSICA...CALLENSBURG...WORTHVILLE AND ANITA.

LAT...LON 4120 7871 4120 7877 4113 7880 4097 7881
      4100 7960 4114 7960 4124 7874 4123 7871
TIME...MOT...LOC 1128Z 265DEG 46KT 4107 7938

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 4:45 AM EDT	Special Weather Statement	PBZ	Mercer, Venango	60 min
Jun 23, 5:33 AM EDT	Special Weather Statement	PBZ	Clarion, Forest	27 min
Jun 23, 5:57 AM EDT	Special Weather Statement	PBZ	Clarion, Jefferson	63 min
Jun 23, 7:29 AM EDT	Special Weather Statement	PBZ	Jefferson	31 min
Jun 23, 8:17 AM EDT	Special Weather Statement	PBZ	Jefferson	13 min
Jun 23, 8:35 AM EDT	Special Weather Statement	PBZ	Lawrence	55 min
Jun 23, 9:42 AM EDT	Flash Flood Warning	PBZ	Lawrence	3 hr
Jun 23, 9:57 AM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	37 min
Jun 23, 10:24 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler	39 min
Jun 23, 10:44 AM EDT	Areal Flood Advisory	PBZ	Venango	2 hr
Jun 23, 11:17 AM EDT	Special Weather Statement	PBZ	Indiana	13 min
Jun 23, 11:19 AM EDT	Special Weather Statement	PBZ	Clarion, Jefferson	26 min
Jun 23, 11:32 AM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer	28 min
Jun 23, 12:00 PM EDT	Special Weather Statement	PBZ	Butler	30 min
Jun 23, 12:02 PM EDT	Areal Flood Advisory	PBZ	Lawrence	118 min
Jun 23, 12:10 PM EDT	Areal Flood Advisory	PBZ	Allegheny	2 hr
Jun 23, 12:36 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	24 min
Jun 23, 12:38 PM EDT	Flash Flood Warning	PBZ	Lawrence	3 hr
Jun 23, 12:47 PM EDT	Areal Flood Advisory	PBZ	Butler	3 hr
Jun 23, 12:57 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Indiana, Westmoreland	48 min
Jun 23, 1:30 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver	30 min
Jun 23, 1:32 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana	43 min
Jun 23, 1:34 PM EDT	Areal Flood Advisory	PBZ	Armstrong	116 min
Jun 23, 1:35 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	25 min
Jun 23, 1:37 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Westmoreland	38 min
Jun 23, 1:51 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Westmoreland	24 min
Jun 23, 1:56 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	19 min
Jun 23, 1:59 PM EDT	Flash Flood Warning	PBZ	Allegheny, Armstrong, Butler, Indiana, Westmoreland	2 hr
Jun 23, 2:13 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	17 min
Jun 23, 2:15 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	30 min
Jun 23, 2:19 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	41 min
Jun 23, 2:25 PM EDT	Flash Flood Warning	PBZ	Armstrong, Indiana, Westmoreland	3 hr
Jun 23, 2:43 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	17 min
Jun 23, 2:53 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	52 min
Jun 23, 2:55 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Indiana, Westmoreland	39 min
Jun 23, 3:03 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	42 min
Jun 23, 3:16 PM EDT	Flash Flood Warning	PBZ	Allegheny, Washington	3 hr
Jun 23, 3:16 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	29 min
Jun 23, 3:19 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	56 min
Jun 23, 3:28 PM EDT	Areal Flood Warning	PBZ	Lawrence	6 hr
Jun 23, 4:14 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	31 min
Jun 23, 2:12 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey, Monroe, Noble	48 min
Jun 23, 3:47 PM EDT	Severe Thunderstorm Warning	PBZ	Preston	58 min
Jun 23, 4:04 PM EDT	Tornado Warning	PBZ	Preston	26 min
Jun 23, 4:21 PM EDT	Severe Thunderstorm Warning	PBZ	Tucker	54 min
Jun 23, 4:45 PM EDT	Special Weather Statement	PBZ	Marion	30 min
Jun 23, 5:35 PM EDT	Special Weather Statement	PBZ	Tucker	55 min
Jun 23, 6:16 PM EDT	Special Weather Statement	PBZ	Tucker	29 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.