Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS State College, PA

August 25, 2011Cambria County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 25, 2011, 4:56 AM EDT for Cambria County, Pennsylvania. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 25, 2011, 4:56 AM EDT (08:56 UTC)
Expired
Aug 25, 2011, 6:00 AM EDT
In force
64 min
Issued by
NWS State College, PA

County Cambria County, PA

The radar

The State College radar (KCCX), 50 km from the middle of the area, began a volume at 08:55 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 00:00Z, 8.9 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.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2011-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1205 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2011-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 251 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1205 J/kg
Mixed-layer CIN
-258 J/kg
Mixed-layer LCL
896 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
251 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 25, 4:32 AM EDT, 24 minutes earlier.

Area forecast discussion, Aug 25, 4:32 AM EDT, 24 minutes before
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Hazardous weather outlook, Aug 25, 12:48 AM EDT, 4 hours 8 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, 2:52 AM EDT, 2 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
252 AM EDT THU AUG 25 2011

PAZ010-011-250715-
CAMERON PA-ELK PA-
252 AM EDT THU AUG 25 2011

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ELK AND WEST CENTRAL
CAMERON COUNTIES...

AT 243 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM JAMES
CITY TO KNOX...MOVING EAST AT 55 MPH.

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
THESE STORMS WILL AFFECT WILCOX...RIDGWAY AND ST. MARYS.

LAT...LON 4143 7907 4146 7906 4145 7897 4155 7896
      4160 7887 4156 7814 4155 7814 4125 7874
      4137 7897 4135 7902 4134 7910 4142 7910

FORECASTER:
Special weather statement, Aug 25, 3:22 AM EDT, 1 hour 34 minutes before
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Special weather statement, Aug 25, 3:59 AM EDT, 57 minutes before
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Special weather statement, Aug 25, 4:10 AM EDT, 46 minutes before
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Special weather statement, Aug 25, 4:53 AM EDT, 3 minutes before
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Special weather statement, Aug 25, 4:56 AM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 12:41 AM EDTSpecial Weather StatementCTPWarren34 min
Aug 25, 12:54 AM EDTSevere Thunderstorm WarningCTPElk, McKean, Potter, Warren66 min
Aug 25, 1:19 AM EDTAreal Flood AdvisoryCTPWarren3 hr
Aug 25, 1:59 AM EDTSpecial Weather StatementCTPMcKean, Warren31 min
Aug 25, 2:30 AM EDTSpecial Weather StatementCTPMcKean, Potter45 min
Aug 25, 2:52 AM EDTSpecial Weather StatementCTPElk23 min
Aug 25, 3:16 AM EDTSevere Thunderstorm WarningCTPCameron, Centre, Clearfield, Clinton, Elk, Lycoming59 min
Aug 25, 3:22 AM EDTSpecial Weather StatementCTPPotter, Tioga53 min
Aug 25, 3:59 AM EDTSpecial Weather StatementCTPWarren31 min
Aug 25, 4:10 AM EDTSpecial Weather StatementCTPClearfield, Clinton, Lycoming65 min
Aug 25, 4:53 AM EDTSpecial Weather StatementCTPLycoming, Sullivan67 min
Aug 25, 5:01 AM EDTSpecial Weather StatementCTPClearfield59 min
Aug 25, 5:55 AM EDTSpecial Weather StatementCTPBedford, Blair, Huntingdon, Juniata, Mifflin, Snyder and 1 more35 min
Aug 25, 6:29 AM EDTSpecial Weather StatementCTPJuniata, Mifflin, Perry, Snyder46 min
Aug 25, 6:32 AM EDTSpecial Weather StatementCTPHuntingdon43 min
Aug 25, 6:46 AM EDTSpecial Weather StatementCTPColumbia, Lycoming, Montour, Northumberland, Schuylkill, Sullivan and 1 more59 min
Aug 25, 7:09 AM EDTSpecial Weather StatementCTPLancaster36 min
Aug 25, 7:16 AM EDTSpecial Weather StatementCTPCumberland, Dauphin, Juniata, Lebanon, Perry59 min
Aug 25, 7:51 AM EDTSpecial Weather StatementCTPAdams, York54 min
Aug 25, 8:04 AM EDTSpecial Weather StatementCTPColumbia26 min

Nearby

Special Weather Statements in Pennsylvania, 2011Every special weather statement 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.