Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 78, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 26, 2009, 5:08 PM EDT for 4 counties in Pennsylvania. It was in force for 67 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 26, 2009, 5:08 PM EDT (21:08 UTC)
- Expired
- Jun 26, 2009, 6:15 PM EDT
- In force
- 67 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
Counties Allegheny County, PA, Fayette County, PA, Washington County, PA, Westmoreland County, PA
The radar
The Pittsburgh radar (KPBZ), 47 km from the middle of the area, began a volume at 21:10 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
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.1 hours before the alert went out and 316 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.
- Mixed-layer CAPE
- 974 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.4
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 26, 2:39 PM EDT, 2 hours 29 minutes earlier.
Area forecast discussion, Jun 26, 2:39 PM EDT, 2 hours 29 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 239 PM EDT FRI JUN 26 2009 .SYNOPSIS... A COLD FRONT WILL SLIDE SOUTHEAST ACROSS THE REGION THIS EVENING BRINGING A ROUND OF STORMS. HIGH PRESSURE WILL THEN BUILD IN FOR SATURDAY. ANOTHER FRONTAL SYSTEM WILL CROSS ON SUNDAY. A GENERALLY UNSETTLED PERIOD IS EXPECTED FOR NEXT WEEK. && .NEAR TERM /THROUGH TONIGHT/... COLD FRONT WILL MOVE SOUTHEAST OF THE REGION BY 3Z THIS EVENING...WITH HIGH PRESSURE BUILDING IN FROM THE WEST. AMPLE INSTABILITY ALONG AND AHEAD OF THIS FRONT FOR THIS EVENING...WITH CAPES AROUND 2500. SHEAR IS MINIMAL FOR TORNADOGENESIS...BUT POTENTIAL FOR LARGE HAIL AND DAMAGING WINDS STILL EXIST. && .SHORT TERM /SATURDAY THROUGH SUNDAY/... HIGH PRESSURE RIDGE IN PLACE FOR SATURDAY...WILL PROVIDE MAINLY CLEAR SKIES. NEXT TROUGH APPROACHES SUNDAY MORNING...WITH MAIN SURFACE TROUGH AXIS CROSSING 18-00Z TIMEFRAME. THIS BOUNDARY SHOULD BE SUFFICIENT TO INITIATE CONVECTION. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... A 500H TROUGH WILL SETTLE INTO THE WESTERN GREAT LAKES REGION SUNDAY NIGHT...AND REMAIN NEARLY STATIONARY INTO WEDNESDAY. THIS WILL LEAD TO A RELATIVELY COOL AND UNSETTLED PERIOD WITH SURFACE TROUGHS PIVOTING AROUND THIS UPPER LOW. THE UPPER TROUGH WILL SLOWLY DRIFT EAST OFF THE NEW ENGLAND COAST BY FRIDAY...WITH UNSETTLED WEATHER CONTINUING ACROSS CWA DURING THE PERIOD. && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... AT 18Z COLD FRONT ON A LINE FROM JUST WEST OF BFD TO EAST OF YNG AND NORTH OF ZZV. EXPECT FRONT TO PASS PIT AROUND 22Z AND BE EAST OF CWA BY 27//0100Z. VISIBLE SATELLITE SHOWS SOME CONVECTION INITIATING ALONG THE FRONT...BUT STRONGEST CONVECT APPEARS TO BE NORTHEAST OF CWA WITH JET ROTATING AROUND VORTEX CENTERED NORTH OF UPSTATE NEW YORK. MORNING STRATUS HAS BURNED OFF AND LIFTED/BURNED OFF WITH VFR CONDITIONS OUTSIDE OF THUNDERSTORMS. TERMINALS CONTAIN BRIEF TWO HOUR PERIOD OF IFR AROUND FRONTAL PASSAGE IN THUNDERSTORMS. EXPECT CLEARING SKIES OVERNIGHT WITH LIGHT WINDS. AREAS OF IFR FOG/STRATUSDEVELOPING AROUND DAYBREAK...BUT IMPROVING TO VFR BY MID MORNING. EXPECT GENERAL VFR CONDITIONS THROUGH AT LEAST MIDDAY SUNDAY UNTIL NEXT COLD FRONT APPROACHES REGION WITH SCATTERED THUNDERSTORMS SUNDAY AFTERNOON AND EVENING. CLOSED UPPER LOW MOVES SOUTHEAST THROUGH THE GREAT LAKES MONDAY WITH ANOTHER ROUND OF SHOWERS/THUNDERSTORMS THROUGH THE BEGINNING OF NEXT WEEK WITH MVFR CONDS PREVAILING. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
Hazardous weather outlook, Jun 26, 2:48 PM EDT, 2 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 248 PM EDT FRI JUN 26 2009 OHZ039>041-048-PAZ007>009-013-271900- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-MERCER-VENANGO-FOREST- LAWRENCE- 248 PM EDT FRI JUN 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA AND WEST CENTRAL PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER 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-PAZ014>016-020>023-029>032- WVZ001>004-012-021>023-041-271900- GARRETT-HARRISON-JEFFERSON OH-MUSKINGUM-GUERNSEY-BELMONT-NOBLE- MONROE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG- INDIANA-WASHINGTON-WESTMORELAND-GREENE-FAYETTE-HANCOCK-BROOKE-OHIO- MARSHALL-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER- 248 PM EDT FRI JUN 26 2009 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...THIS AFTERNOON AND TONIGHT. SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. THE MAIN HAZARDS WILL BE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER 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 26, 2:58 PM EDT, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 258 PM EDT FRI JUN 26 2009 OHZ069-WVZ012-021-262000- MARION WV-MONROE OH-WETZEL WV- 258 PM EDT FRI JUN 26 2009 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... MONROE...MARION AND WETZEL... AT 258 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS OVER ANTIOCH...MOVING SOUTHEAST AT 20 MPH. THESE STORMS WILL CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO 35 MPH. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... GRAYSVILLE... ANTIOCH... ROUND BOTTOM... BENWOOD... FLY... HANNIBAL... NEW MARTINSVILLE... PORTERS FALLS... WILEYVILLE... PINE GROVE... JACKSONBURG... SMITHFIELD... KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
Special weather statement, Jun 26, 3:11 PM EDT, 1 hour 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 311 PM EDT FRI JUN 26 2009 PAZ009-015-016-262015- CLARION PA-FOREST PA-JEFFERSON PA- 311 PM EDT FRI JUN 26 2009 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... JEFFERSON...FOREST AND CLARION... AT 310 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 5 MILES SOUTHWEST OF HOMINY RIDGE...OR ABOUT 5 MILES SOUTHWEST OF COOK FOREST STATE PARK...MOVING SOUTHEAST AT 20 MPH. THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO 40 MPH. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... COOK FOREST STATE PARK... REDCLYFFE... CLEAR CREEK STATE PARK... SUMMERVILLE... BROOKVILLE... BROCKWAY... REYNOLDSVILLE... KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
Special weather statement, Jun 26, 3:44 PM EDT, 1 hour 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 344 PM EDT FRI JUN 26 2009 PAZ014-020-022-262015- ARMSTRONG PA-BEAVER PA-BUTLER PA- 344 PM EDT FRI JUN 26 2009 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... ARMSTRONG...BEAVER AND BUTLER... AT 339 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED SCATTERED THUNDERSTORMS FROM NORTHERN ARMSTRONG THROUGH BEAVER AND INTO SOUTHERN BEAVER COUNTIES. THE STORMS WERE MOVING TO THE SOUTHEAST ABOUT 20 MPH. THEY WILL PRODUCE DANGEROUS LIGHTNING...BRIEF HEAVY DOWNPOURS...AND WINDS GUSTING TO ABOUT 35 MPH.
Special weather statement, Jun 26, 4:35 PM EDT, 33 minutes before
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</html>Special weather statement, Jun 26, 4:40 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 440 PM EDT FRI JUN 26 2009 WVZ021>023-262115- MARION WV-MONONGALIA WV-PRESTON WV- 440 PM EDT FRI JUN 26 2009 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... MARION...PRESTON AND MONONGALIA... AT 436 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED THUNDERSTORMS OVER NORTHERN MONONGALIA COUNTY MOVING SOUTHEAST AT ABOUT 25 MPH. THE STORM WILL MOVE OVER MORGANTOWN BETWEEN 445 PM AND 515 PM. BE ALERT FOR GUSTY WINDS TO NEAR 40 MPH...DANGEROUS LIGHTNING...SMALL HAIL...AND HEAVY DOWNPOURS.
Special weather statement, Jun 26, 4:45 PM EDT, 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 445 PM EDT FRI JUN 26 2009 PAZ016-022-023-030-262130- ARMSTRONG PA-INDIANA PA-JEFFERSON PA-WESTMORELAND PA- 445 PM EDT FRI JUN 26 2009 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... ARMSTRONG...WESTMORELAND...INDIANA AND JEFFERSON... AT 441 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED THUNDERSTORMS OVER SOUTHERN JEFFERSON...WESTERN INDIANA...AND SOUTHERN ARMSTRONG COUNTIES. THE STORMS WERE MOVING TO THE SOUTHEAST ABOUT 20 MPH. BE ALERT FOR DANGEROUS LIGHTNING...SMALL HAIL...GUSTY WINDS TO NEAR 40 MPH AND HEAVY DOWNPOURS.
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 9:08 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 52 min |
| Jun 25, 9:52 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 39 min |
| Jun 25, 8:15 PM EDT | Severe Thunderstorm Warning | PBZ | Carroll, Harrison, Tuscarawas | 60 min |
| Jun 25, 8:20 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey | 55 min |
| Jun 25, 9:15 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Muskingum | 45 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2009Every severe thunderstorm warning in 2009
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.