Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 14, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at May 31, 2008, 4:54 PM EDT for Clarion County, Jefferson County, Pennsylvania. It was in force for 51 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
- May 31, 2008, 4:54 PM EDT (20:54 UTC)
- Expired
- May 31, 2008, 5:45 PM EDT
- In force
- 51 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
Counties Clarion County, PA, Jefferson County, PA
The radar
The State College radar (KCCX), 105 km from the middle of the area, began a volume at 20:55 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 (KPIT), launched 12:00Z, 8.9 hours before the alert went out and 112 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
- 32 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 329 m²/s²
- 0-3 km storm-relative helicity
- 377 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 31, 3:08 PM EDT, 1 hour 46 minutes earlier.
Area forecast discussion, May 31, 3:08 PM EDT, 1 hour 46 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 308 PM EDT SAT MAY 31 2008 .SYNOPSIS... HIGH PRESSURE WILL BUILD INTO THE UPPER OHIO VALLEY TONIGHT THROUGH MONDAY. THE NEXT SYSTEM WILL BRING SCATTERED THUNDERSTORMS BY MIDWEEK. && .NEAR TERM /THROUGH SUNDAY/... SCATTERED THUNDERSTORMS WILL EXIT FAR SOUTHEASTERN COUNTIES EARLY THIS EVENING AS COLD FRONT MOVES EAST. DRIER AIR WILL GRADUALLY WORK ITS WAY ACROSS THE FORECAST AREA AS SURFACE HIGH BUILDS IN. OVERNIGHT TEMPERATURES WILL DROP INTO THE LOWER TO MID 50S AND RECOVER INTO THE 70S SUNDAY AFTERNOON. INSTABILITY WILL REMAIN WITH COOLING ALOFT. SO WILL KEEP SLIGHT CHANCE POPS FOR SHOWERS AND THUNDERSTORMS SUNDAY AFTERNOON. && .SHORT TERM /SUNDAY NIGHT THROUGH MONDAY NIGHT/... SURFACE HIGH WILL SLIDE EASTWARD ACROSS REGION AND KEEP CONDITIONS MAINLY DRY. TEMPERATURES WILL BE NEAR NORMAL. && .LONG TERM /TUESDAY THROUGH SATURDAY/... NEXT LOW PRESSURE SYSTEM WILL MOVE EAST ACROSS THE GREAT LAKES TUESDAY AND WEDNESDAY. FRONTAL BOUNDARY WILL STRETCH OUT BEHIND SYSTEM AND THEN IS PROGGED TO PUSH NORTH OF OUR REGION LATE IN THE WEEK. PLAN TO MENTION CHANCE POPS FOR SHOWERS AND THUNDERSTORMS TUESDAY THROUGH THURSDAY AND THEN BACK OFF TO SLIGHT CHANCE IN WARM SECTOR FRIDAY AND SATURDAY. TEMPERATURES WILL WARM TO ABOVE NORMAL FOR THE LAST HALF OF THE WEEK. && .AVIATION /18Z SATURDAY THROUGH THURSDAY/... GENERAL VFR CONDITIONS CAN BE EXPECTED TONIGHT OUTSIDE OF SCATTERED SHOWERS AND THUNDERSTORMS. A COLD FRONT WILL PUSH EAST OF THE FORECAST AREA TONIGHT WITH DRIER AIR MOVING INTO THE DISTRICT BEHIND THE FRONT LATER TONIGHT. SOME SCATTERED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED THIS EVENING WITH ISOLATED MVFR CIGS AND VSBY IN SHOWERS AND POSSIBLE BRIEF IFR CONDITIONS IN THE HEAVIER THUNDERSTORMS. SHOWERS THREAT WILL DIMINISH OVERNIGHT AS DRIER AIR FEEDS INTO THE DISTRICT BEHIND THE FRONT. VFR CONDITIONS WILL RETURN FOR SUNDAY/MONDAY UNDER WEAK HIGH PRESSURE...WITH WAVES PRODUCING SCATTERED SHOWERS/TSTMS AND MVFR CONDITIONS FOR TUESDAY THROUGH THURSDAY. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
Hazardous weather outlook, May 31, 11:14 AM EDT, 5 hours 40 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 1114 AM EDT SAT MAY 31 2008 MDZ001-OHZ068-069-PAZ031-032-WVZ004-012-021>023-011515- GARRETT-NOBLE-MONROE-GREENE-FAYETTE-MARSHALL-WETZEL-MARION- MONONGALIA-PRESTON- 1114 AM EDT SAT MAY 31 2008 ...TORNADO WATCH 402 IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST CENTRAL OHIO...SOUTHWEST 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. TORNADO WATCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER NETWORK HAS BEEN ACTIVATED. PAZ007>009-015-016-011515- MERCER-VENANGO-FOREST-CLARION-JEFFERSON PA- 1114 AM EDT SAT MAY 31 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST PENNSYLVANIA AND WEST CENTRAL PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER NETWORK HAS BEEN ACTIVATED. OHZ039>041-048>050-057-058-PAZ013-014-020>023-029-030-WVZ001>003- 011515- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH- MUSKINGUM-GUERNSEY-LAWRENCE-BUTLER-BEAVER-ALLEGHENY-ARMSTRONG- INDIANA-WASHINGTON-WESTMORELAND-HANCOCK-BROOKE-OHIO- 1114 AM EDT SAT MAY 31 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER NETWORK HAS BEEN ACTIVATED. OHZ059-011515- BELMONT- 1114 AM EDT SAT MAY 31 2008 ...TORNADO WATCH 402 IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO. .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. TORNADO WATCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER NETWORK HAS BEEN ACTIVATED. WVZ041-011515- TUCKER- 1114 AM EDT SAT MAY 31 2008 ...TORNADO WATCH 402 IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN 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. TORNADO WATCH. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER NETWORK HAS BEEN ACTIVATED.
In the hours before
Special weather statement, May 31, 3:50 PM EDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 350 PM EDT SAT MAY 31 2008 PAZ008-312030- VENANGO PA- 350 PM EDT SAT MAY 31 2008 ...AREA OF STRONG THUNDERSTORMS... AN AREA OF STRONG THUNDERSTORMS WILL MOVE ACROSS NORTHERN VENANGO COUNTY THROUGH 430 PM... AT 350 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 8 MILES NORTHWEST OF SUGARCREEK...OR ABOUT 8 MILES NORTHEAST OF MAURICE K GODDARD STATE PARK...MOVING EAST AT 35 MPH. THE CURRENT TRACK OF THESE STORMS INDICATES THAT THE STRONGEST ACTIVITY SHOULD REMAIN NORTH OF OIL CITY. THESE STORMS WILL CONTAIN VERY HEAVY DOWNPOURS...PEA SIZE HAIL AND FREQUENT CLOUD TO GROUND LIGHTNING STRIKES. WIND GUSTS IN EXCESS OF 40 MPH ARE POSSIBLE. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... OIL CITY...OIL CREEK STATE PARK...SUGARCREEK...AHRENSVILLE AND POINT HILL 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, May 31, 4:20 PM EDT, 34 minutes before
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</html>The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 4:03 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 42 min |
| May 31, 4:38 AM EDT | Severe Thunderstorm Warning | PBZ | Coshocton | 52 min |
| May 31, 4:53 AM EDT | Severe Thunderstorm Warning | PBZ | Muskingum | 52 min |
| May 31, 8:07 AM EDT | Severe Thunderstorm Warning | PBZ | Preston | 53 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2008Every severe thunderstorm warning in 2008
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.