Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 226, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 25, 2011, 12:54 AM EDT for 4 counties in Pennsylvania. It was in force for 66 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
- Aug 25, 2011, 12:54 AM EDT (04:54 UTC)
- Expired
- Aug 25, 2011, 2:00 AM EDT
- In force
- 66 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
Counties Elk County, PA, McKean County, PA, Potter County, PA, Warren County, PA
The radar
The State College radar (KCCX), 99 km from the middle of the area, began a volume at 04:54 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 25, 12:42 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 4.9 hours before the alert went out and 137 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
- 352 J/kg
- Mixed-layer CIN
- -345 J/kg
- Mixed-layer LCL
- 1391 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 327 m²/s²
- 0-3 km storm-relative helicity
- 391 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 24, 10:53 PM EDT, 2 hours 1 minute earlier.
Area forecast discussion, Aug 24, 10:53 PM EDT, 2 hours 1 minute before
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</html>Hazardous weather outlook, Aug 25, 12:48 AM EDT, 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 1248 AM EDT THU AUG 25 2011 PAZ012-018-019-025>028-033>036-041-042-045-046-049>053-056>059- 063>066-260500- NORTHERN CLINTON-NORTHERN CENTRE-SOUTHERN CENTRE-BLAIR-HUNTINGDON- MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-NORTHERN LYCOMING- SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR- NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND- ADAMS-YORK-LANCASTER- 1248 AM EDT THU AUG 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. A COLD FRONT WILL MOVE ACROSS PENNSYLVANIA TODAY AND MAY PRODUCE STRONG TO LOCALLY SEVERE THUNDERSTORMS. THE GREATEST RISK FOR SEVERE WEATHER IS OVER EASTERN AREAS. IN ADDITION...HEAVY CONVECTIVE RAINFALL IS POSSIBLE WHICH COULD LEAD TO FLOODING. HURRICANE IRENE IS FORECAST TO TRACK ALONG OR JUST EAST OF THE MID ATLANTIC COAST THIS WEEKEND. THIS TROPICAL SYSTEM MAY BRING HEAVY RAIN AND GUSTY WINDS TO EASTERN PENNSYLVANIA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ004>006-010-011-017-024-037-260500- WARREN-MCKEAN-POTTER-ELK-CAMERON-CLEARFIELD-CAMBRIA-TIOGA- 1248 AM EDT THU AUG 25 2011 ...SEVERE THUNDERSTORM WATCH 806 IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. A COLD FRONT WILL MOVE ACROSS PENNSYLVANIA TODAY AND MAY PRODUCE STRONG TO LOCALLY SEVERE THUNDERSTORMS. THE GREATEST RISK FOR SEVERE WEATHER IS OVER EASTERN AREAS. IN ADDITION...HEAVY CONVECTIVE RAINFALL IS POSSIBLE WHICH COULD LEAD TO FLOODING. HURRICANE IRENE IS FORECAST TO TRACK ALONG OR JUST EAST OF THE MID ATLANTIC COAST THIS WEEKEND. THIS TROPICAL SYSTEM MAY BRING HEAVY RAIN AND GUSTY WINDS TO EASTERN PENNSYLVANIA. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN STATE COLLEGE.
In the hours before
Special weather statement, Aug 25, 12:41 AM EDT, 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1241 AM EDT THU AUG 25 2011
PAZ004-250515-
WARREN PA-
1241 AM EDT THU AUG 25 2011
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN WARREN
COUNTY...
AT 1242 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 7
MILES NORTH OF FREWSBURG TO 13 MILES WEST OF ELGIN...MOVING EAST AT
60 MPH.
WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
THESE STORMS WILL AFFECT COLUMBUS...SUGAR GROVE...RUSSELL AND
YOUNGSVILLE.
LAT...LON 4200 7892 4193 7892 4169 7961 4170 7962
4200 7961
FORECASTER:The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 12:41 AM EDT | Special Weather Statement | CTP | Warren | 34 min |
| Aug 25, 1:19 AM EDT | Areal Flood Advisory | CTP | Warren | 3 hr |
| Aug 25, 1:59 AM EDT | Special Weather Statement | CTP | McKean, Warren | 31 min |
| Aug 25, 2:30 AM EDT | Special Weather Statement | CTP | McKean, Potter | 45 min |
| Aug 25, 2:52 AM EDT | Special Weather Statement | CTP | Elk | 23 min |
| Aug 25, 3:16 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Centre, Clearfield, Clinton, Elk, Lycoming | 59 min |
| Aug 25, 3:22 AM EDT | Special Weather Statement | CTP | Potter, Tioga | 53 min |
| Aug 25, 3:59 AM EDT | Special Weather Statement | CTP | Warren | 31 min |
| Aug 25, 4:10 AM EDT | Special Weather Statement | CTP | Clearfield, Clinton, Lycoming | 65 min |
| Aug 25, 4:53 AM EDT | Special Weather Statement | CTP | Lycoming, Sullivan | 67 min |
| Aug 25, 4:56 AM EDT | Special Weather Statement | CTP | Cambria | 64 min |
| Aug 25, 5:01 AM EDT | Special Weather Statement | CTP | Clearfield | 59 min |
| Aug 25, 5:55 AM EDT | Special Weather Statement | CTP | Bedford, Blair, Huntingdon, Juniata, Mifflin, Snyder and 1 more | 35 min |
| Aug 25, 6:29 AM EDT | Special Weather Statement | CTP | Juniata, Mifflin, Perry, Snyder | 46 min |
| Aug 25, 6:32 AM EDT | Special Weather Statement | CTP | Huntingdon | 43 min |
| Aug 25, 6:46 AM EDT | Special Weather Statement | CTP | Columbia, Lycoming, Montour, Northumberland, Schuylkill, Sullivan and 1 more | 59 min |
| Aug 25, 7:09 AM EDT | Special Weather Statement | CTP | Lancaster | 36 min |
| Aug 25, 7:16 AM EDT | Special Weather Statement | CTP | Cumberland, Dauphin, Juniata, Lebanon, Perry | 59 min |
| Aug 25, 7:51 AM EDT | Special Weather Statement | CTP | Adams, York | 54 min |
| Aug 25, 8:04 AM EDT | Special Weather Statement | CTP | Columbia | 26 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2011Every severe thunderstorm warning in 2011
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.