Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 134, NWS State College, PA

July 23, 2010Centre County, Clearfield County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 23, 2010, 6:15 PM EDT for Centre County, Clearfield County, Pennsylvania. It was in force for 30 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, 6:15 PM EDT (22:15 UTC)
Expired: Jul 23, 2010, 6:45 PM EDT
In force: 30 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Centre County, PA, Clearfield County, PA

The radar

The State College radar (KCCX), 13 km from the middle of the area, began a volume at 22:16 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
Jul 23, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.3 hours before the alert went out and 224 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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, 2 hours 9 minutes earlier.

Area forecast discussion, Jul 23, 4:06 PM EDT, 2 hours 9 minutes before

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Hazardous weather outlook, Jul 23, 4:22 PM EDT, 1 hour 53 minutes before

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In the hours before

Special weather statement, Jul 23, 2:14 PM EDT, 4 hours 1 minute 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, 3 hours 22 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, 3 hours 3 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, 1 hour 14 minutes before

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Special weather statement, Jul 23, 5:49 PM EDT, 26 minutes before

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Special weather statement, Jul 23, 5:58 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.

Issued	Product	Office	Counties	Lasted
Jul 23, 6:06 AM EDT	Special Weather Statement	CTP	Lycoming	39 min
Jul 23, 6:13 AM EDT	Excessive Heat Watch	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, York	10 hr
Jul 23, 6:13 AM EDT	Heat Advisory	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, York	15 hr
Jul 23, 12:14 PM EDT	Special Weather Statement	CTP	Warren	61 min
Jul 23, 1:06 PM EDT	Special Weather Statement	CTP	McKean	24 min
Jul 23, 1:28 PM EDT	Special Weather Statement	CTP	Forest	32 min
Jul 23, 2:14 PM EDT	Special Weather Statement	CTP	Elk	31 min
Jul 23, 2:53 PM EDT	Special Weather Statement	CTP	Cameron, Elk	37 min
Jul 23, 3:12 PM EDT	Special Weather Statement	CTP	Elk	33 min
Jul 23, 3:27 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	63 min
Jul 23, 4:03 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk	57 min
Jul 23, 4:18 PM EDT	Excessive Heat Warning	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, York	29 hr
Jul 23, 4:18 PM EDT	Heat Advisory	CTP	Bedford, Blair, Centre, Clinton, Columbia, Franklin and 11 more	29 hr
Jul 23, 5:01 PM EDT	Special Weather Statement	CTP	Centre	29 min
Jul 23, 5:18 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	57 min
Jul 23, 5:22 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	38 min
Jul 23, 5:49 PM EDT	Special Weather Statement	CTP	Elk	41 min
Jul 23, 5:58 PM EDT	Special Weather Statement	CTP	Juniata	32 min
Jul 23, 5:59 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Mifflin, Snyder	37 min
Jul 23, 6:26 PM EDT	Special Weather Statement	CTP	Cambria	49 min
Jul 23, 6:34 PM EDT	Special Weather Statement	CTP	Snyder	26 min
Jul 23, 6:44 PM EDT	Special Weather Statement	CTP	Centre	31 min
Jul 23, 7:05 PM EDT	Special Weather Statement	CTP	Dauphin, Lebanon, Schuylkill	40 min
Jul 23, 7:11 PM EDT	Special Weather Statement	CTP	Centre	34 min
Jul 23, 7:49 PM EDT	Special Weather Statement	CTP	Schuylkill	26 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010 Every 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.