Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 131, NWS State College, PA

July 23, 2010Clearfield County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 23, 2010, 5:18 PM EDT for Clearfield County, Pennsylvania. It was in force for 57 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
Jul 23, 2010, 5:18 PM EDT (21:18 UTC)
Expired
Jul 23, 2010, 6:15 PM EDT
In force
57 min
Issued by
NWS State College, PA
Area
Storm-based polygon

County Clearfield County, PA

The radar

The State College radar (KCCX), 40 km from the middle of the area, began a volume at 21:21 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.

IssuedProductOfficeLasted
Jul 23, 12:46 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.3 hours before the alert went out and 215 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, Buffalo Intl Airport, NY at 12:00Z on 2010-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 497 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, Buffalo Intl Airport, NY at 12:00Z on 2010-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 352 square meters per square second.193958Sfc1 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
497 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
509 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
352 m²/s²
0-3 km storm-relative helicity
401 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.1

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 State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 23, 4:06 PM EDT, 1 hour 12 minutes earlier.

Area forecast discussion, Jul 23, 4:06 PM EDT, 1 hour 12 minutes before
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Hazardous weather outlook, Jul 23, 4:22 PM EDT, 56 minutes before
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In the hours before

Special weather statement, Jul 23, 1:06 PM EDT, 4 hours 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
106 PM EDT FRI JUL 23 2010

PAZ004-231730-
WARREN PA-
106 PM EDT FRI JUL 23 2010

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN WARREN COUNTY...

AT 104 PM EDT...A STRONG THUNDERSTORM WAS 23 MILES NORTH OF OIL
CITY...MOVING EAST AT 35 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. THIS STORM WILL BE
NEAR GARLAND AROUND 120 PM...TIDIOUTE AROUND 125 PM AND CHAPMAN STATE
PARK AROUND 130 PM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 62.

LAT...LON 4184 7962 4181 7908 4162 7911 4162 7938
      4165 7963 4183 7963

FORECASTER: TYBURSKI
Special weather statement, Jul 23, 1:28 PM EDT, 3 hours 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
128 PM EDT FRI JUL 23 2010

PAZ004-005-010-231800-
ELK PA-MCKEAN PA-WARREN PA-
128 PM EDT FRI JUL 23 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN ELK...SOUTHEASTERN
WARREN AND SOUTHWESTERN MCKEAN COUNTIES...

AT 127 PM EDT...A STRONG THUNDERSTORM WAS 15 MILES SOUTHWEST OF
WARREN...MOVING EAST AT 35 MPH.

WIND GUSTS TO 50 MPH AND PENNY SIZE HAIL ARE POSSIBLE WITH THIS
STORM. THIS STORM WILL BE NEAR CHAPMAN STATE PARK AROUND 135 PM...
CLARENDON AROUND 145 PM...SHEFFIELD AROUND 150 PM...LUDLOW AROUND 155
PM AND JAMES CITY AROUND 200 PM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 62...
STATE ROAD 66.

LAT...LON 4183 7933 4177 7879 4142 7881 4146 7897
      4162 7896 4162 7898 4162 7929 4162 7944
      4163 7945

FORECASTER: JUNG
Special weather statement, Jul 23, 2:14 PM EDT, 3 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
214 PM EDT FRI JUL 23 2010

PAZ010-231845-
ELK PA-
214 PM EDT FRI JUL 23 2010

...A STRONG THUNDERSTORM WILL AFFECT ELK COUNTY...

AT 213 PM EDT...A STRONG THUNDERSTORM WAS NEAR JAMES CITY...MOVING
EAST AT 35 MPH.

WIND GUSTS TO 50 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
THIS STORM WILL BE NEAR WILCOX AROUND 225 PM...JOHNSONBURG AROUND 230
PM...EAST BRANCH DAM AROUND 235 PM AND ST. MARYS AROUND 240 PM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...STATE ROAD
66...STATE ROAD 120...STATE ROAD 255.

LAT...LON 4161 7849 4161 7842 4151 7843 4150 7844
      4126 7847 4148 7897 4163 7897 4163 7849

FORECASTER: JUNG
Special weather statement, Jul 23, 2:53 PM EDT, 2 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
253 PM EDT FRI JUL 23 2010

PAZ010-011-231930-
CAMERON PA-ELK PA-
253 PM EDT FRI JUL 23 2010

...A STRONG THUNDERSTORM WILL AFFECT CAMERON AND EASTERN ELK
COUNTIES...

AT 249 PM EDT...A STRONG THUNDERSTORM WAS NEAR ST. MARYS...MOVING
SOUTHEAST AT 30 MPH.

WIND GUSTS TO 50 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
THIS STORM WILL BE NEAR TRUMAN AROUND 305 PM...BENEZETTE AROUND 315
PM...HICKS RUN AROUND 325 PM AND DRIFTWOOD AROUND 330 PM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...STATE ROAD 120...STATE
ROAD 255.

LAT...LON 4153 7811 4148 7805 4148 7801 4147 7800
      4136 7800 4122 7810 4125 7847 4138 7869
      4159 7856

FORECASTER: JUNG
Special weather statement, Jul 23, 3:12 PM EDT, 2 hours 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
312 PM EDT FRI JUL 23 2010

PAZ010-231945-
ELK PA-
312 PM EDT FRI JUL 23 2010

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL ELK COUNTY...

AT 308 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
MARIENVILLE TO 8 MILES EAST OF FRYBURG...MOVING EAST AT 30 MPH.

WIND GUSTS TO 50 MPH AND PENNY SIZE HAIL ARE POSSIBLE WITH THESE
STORMS. THESE STORMS WILL BE NEAR PORTLAND MILLS AROUND 335 PM...
RIDGWAY AROUND 340 PM AND BRANDY CAMP AROUND 345 PM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...STATE ROAD
66...STATE ROAD 120...STATE ROAD 255.

LAT...LON 4145 7907 4146 7899 4144 7897 4159 7896
      4160 7894 4154 7842 4130 7864 4127 7877
      4137 7896 4135 7902 4135 7910 4142 7910

FORECASTER: JUNG
Special weather statement, Jul 23, 5:01 PM EDT, 17 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 6:06 AM EDTSpecial Weather StatementCTPLycoming39 min
Jul 23, 6:13 AM EDTExcessive Heat WatchCTPAdams, Cumberland, Dauphin, Lancaster, Lebanon, York10 hr
Jul 23, 6:13 AM EDTHeat AdvisoryCTPAdams, Cumberland, Dauphin, Lancaster, Lebanon, York15 hr
Jul 23, 12:14 PM EDTSpecial Weather StatementCTPWarren61 min
Jul 23, 1:06 PM EDTSpecial Weather StatementCTPMcKean24 min
Jul 23, 1:28 PM EDTSpecial Weather StatementCTPForest32 min
Jul 23, 2:14 PM EDTSpecial Weather StatementCTPElk31 min
Jul 23, 2:53 PM EDTSpecial Weather StatementCTPCameron, Elk37 min
Jul 23, 3:12 PM EDTSpecial Weather StatementCTPElk33 min
Jul 23, 3:27 PM EDTSevere Thunderstorm WarningCTPClearfield, Elk63 min
Jul 23, 4:03 PM EDTSevere Thunderstorm WarningCTPCameron, Centre, Clearfield, Clinton, Elk57 min
Jul 23, 4:18 PM EDTExcessive Heat WarningCTPAdams, Cumberland, Dauphin, Lancaster, Lebanon, York29 hr
Jul 23, 4:18 PM EDTHeat AdvisoryCTPBedford, Blair, Centre, Clinton, Columbia, Franklin and 11 more29 hr
Jul 23, 5:01 PM EDTSpecial Weather StatementCTPCentre29 min
Jul 23, 5:22 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton38 min
Jul 23, 5:49 PM EDTSpecial Weather StatementCTPElk41 min
Jul 23, 5:58 PM EDTSpecial Weather StatementCTPJuniata32 min
Jul 23, 5:59 PM EDTSevere Thunderstorm WarningCTPCentre, Mifflin, Snyder37 min
Jul 23, 6:15 PM EDTSevere Thunderstorm WarningCTPCentre, Clearfield30 min
Jul 23, 6:26 PM EDTSpecial Weather StatementCTPCambria49 min
Jul 23, 6:34 PM EDTSpecial Weather StatementCTPSnyder26 min
Jul 23, 6:44 PM EDTSpecial Weather StatementCTPCentre31 min
Jul 23, 7:05 PM EDTSpecial Weather StatementCTPDauphin, Lebanon, Schuylkill40 min
Jul 23, 7:11 PM EDTSpecial Weather StatementCTPCentre34 min
Jul 23, 7:49 PM EDTSpecial Weather StatementCTPSchuylkill26 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010Every severe thunderstorm warning in 2010

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.