Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 66, NWS State College, PA

June 25, 2009Clearfield County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 25, 2009, 10:18 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: Jun 25, 2009, 10:18 PM EDT (02:18 UTC)
Expired: Jun 25, 2009, 11:15 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 02:20 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, 2.3 hours before the alert went out and 152 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: 2793 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1178 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 Jun 25, 9:39 PM EDT, 39 minutes earlier.

Area forecast discussion, Jun 25, 9:39 PM EDT, 39 minutes before

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Hazardous weather outlook, Jun 25, 5:19 AM EDT, 16 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
519 AM EDT THU JUN 25 2009

PAZ004>006-010>012-017>019-024>027-033-037-041-042-045-046-260930-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
SOMERSET-TIOGA-NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-
SOUTHERN LYCOMING-
519 AM EDT THU JUN 25 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

A COLD FRONT APPROACHING FROM GREAT LAKES WILL PRODUCE
THUNDERSTORMS ACROSS MUCH OF THE AREA THIS EVENING. A FEW OF THESE
STORMS COULD PRODUCE DAMAGING WIND GUSTS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ028-034>036-049>053-056>059-063>066-260930-
JUNIATA-BEDFORD-FULTON-FRANKLIN-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-
COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-
LANCASTER-
519 AM EDT THU JUN 25 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jun 25, 5:05 PM EDT, 5 hours 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
505 PM EDT THU JUN 25 2009

PAZ037-252130-
TIOGA PA-
505 PM EDT THU JUN 25 2009

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL TIOGA COUNTY...

AT 504 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR WELLSBORO...
MOVING EAST AT 10 MPH.

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN IS ALSO POSSIBLE...CAUSING WATER TO POND ON
ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR WELLSBORO AROUND 525 PM AND MORRIS AROUND 530
PM.

LAT...LON 4182 7711 4160 7715 4166 7753 4184 7750

EXPERIMENTAL

FORECASTER: LA CORTE

Local storm report, Jun 25, 7:12 PM EDT, 3 hours 6 minutes before

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Special weather statement, Jun 25, 9:45 PM EDT, 33 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
Jun 25, 9:45 PM EDT	Special Weather Statement	CTP	Cambria	30 min
Jun 25, 10:34 PM EDT	Special Weather Statement	CTP	Elk	41 min
Jun 25, 11:14 PM EDT	Special Weather Statement	CTP	Clearfield	31 min
Jun 25, 11:42 PM EDT	Special Weather Statement	CTP	Clearfield	78 min
Jun 26, 12:10 AM EDT	Special Weather Statement	CTP	Blair, Cambria	65 min
Jun 26, 12:40 AM EDT	Special Weather Statement	CTP	Blair, Huntingdon	50 min
Jun 26, 12:54 PM EDT	Special Weather Statement	CTP	Tioga	36 min
Jun 26, 1:19 PM EDT	Areal Flood Advisory	CTP	Tioga	116 min
Jun 26, 1:21 PM EDT	Special Weather Statement	CTP	Tioga	24 min
Jun 26, 1:29 PM EDT	Special Weather Statement	CTP	Tioga	31 min
Jun 26, 1:43 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	62 min
Jun 26, 1:51 PM EDT	Special Weather Statement	CTP	Tioga	39 min
Jun 26, 2:17 PM EDT	Special Weather Statement	CTP	Potter	43 min
Jun 26, 2:27 PM EDT	Severe Thunderstorm Warning	CTP	Potter	48 min
Jun 26, 2:40 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	65 min
Jun 26, 2:59 PM EDT	Special Weather Statement	CTP	Tioga	46 min
Jun 26, 3:11 PM EDT	Special Weather Statement	CTP	Franklin	34 min
Jun 26, 3:16 PM EDT	Areal Flood Advisory	CTP	Tioga	3 hr
Jun 26, 3:40 PM EDT	Special Weather Statement	CTP	Sullivan	35 min
Jun 26, 3:55 PM EDT	Special Weather Statement	CTP	Sullivan	35 min
Jun 26, 4:03 PM EDT	Special Weather Statement	CTP	Cumberland	27 min
Jun 26, 4:06 PM EDT	Special Weather Statement	CTP	Adams	24 min
Jun 26, 4:15 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Lancaster, York	60 min
Jun 26, 4:18 PM EDT	Special Weather Statement	CTP	Cameron	57 min
Jun 26, 4:19 PM EDT	Special Weather Statement	CTP	Franklin	26 min
Jun 26, 4:33 PM EDT	Special Weather Statement	CTP	Columbia, Lycoming	27 min
Jun 26, 4:58 PM EDT	Special Weather Statement	CTP	Columbia	32 min
Jun 26, 5:07 PM EDT	Special Weather Statement	CTP	Montour	23 min
Jun 26, 5:15 PM EDT	Special Weather Statement	CTP	York	45 min
Jun 26, 5:29 PM EDT	Special Weather Statement	CTP	Mifflin	31 min
Jun 26, 5:34 PM EDT	Special Weather Statement	CTP	Union	26 min
Jun 26, 5:38 PM EDT	Special Weather Statement	CTP	York	37 min
Jun 26, 5:43 PM EDT	Severe Thunderstorm Warning	CTP	York	62 min
Jun 26, 6:01 PM EDT	Special Weather Statement	CTP	Northumberland, Union	44 min
Jun 26, 6:19 PM EDT	Special Weather Statement	CTP	Juniata, Mifflin, Perry, Snyder	26 min
Jun 26, 6:24 PM EDT	Special Weather Statement	CTP	Schuylkill	36 min
Jun 26, 6:42 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Juniata, Perry	51 min
Jun 26, 6:48 PM EDT	Special Weather Statement	CTP	Bedford	27 min
Jun 26, 6:57 PM EDT	Special Weather Statement	CTP	Lebanon	33 min
Jun 26, 7:02 PM EDT	Special Weather Statement	CTP	Franklin	43 min
Jun 26, 7:45 PM EDT	Special Weather Statement	CTP	Berks	30 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2009 Every severe thunderstorm warning in 2009

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.