Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 135, NWS State College, PA

July 23, 2010Warren County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 23, 2010, 10:01 PM EDT for Warren County, Pennsylvania. It was in force for 44 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, 10:01 PM EDT (02:01 UTC)
Expired: Jul 23, 2010, 10:45 PM EDT
In force: 44 min
Issued by: NWS State College, PA
Area: Storm-based polygon

County Warren County, PA

The radar

The Buffalo radar (KBUF), 134 km from the middle of the area, began a volume at 02:04 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 2.0 hours before the alert went out and 133 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: 572 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.2

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, 9:24 PM EDT, 37 minutes earlier.

Area forecast discussion, Jul 23, 9:24 PM EDT, 37 minutes before

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Hazardous weather outlook, Jul 23, 6:55 PM EDT, 3 hours 6 minutes before

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In the hours before

Special weather statement, Jul 23, 7:05 PM EDT, 2 hours 56 minutes before

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Special weather statement, Jul 23, 7:05 PM EDT, 2 hours 56 minutes before

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Special weather statement, Jul 23, 7:11 PM EDT, 2 hours 50 minutes before

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Local storm report, Jul 23, 7:31 PM EDT, 2 hours 30 minutes before

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Special weather statement, Jul 23, 7:49 PM EDT, 2 hours 12 minutes before

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Special weather statement, Jul 23, 9:38 PM EDT, 23 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, 9:38 PM EDT	Special Weather Statement	CTP	McKean, Warren	52 min
Jul 23, 10:00 PM EDT	Areal Flood Advisory	CTP	McKean, Warren	3 hr
Jul 23, 10:22 PM EDT	Special Weather Statement	CTP	McKean, Potter	38 min
Jul 23, 10:37 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean	38 min
Jul 23, 11:21 PM EDT	Special Weather Statement	CTP	Cameron, Clinton	24 min
Jul 23, 11:47 PM EDT	Special Weather Statement	CTP	Clinton	28 min
Jul 24, 12:15 AM EDT	Special Weather Statement	CTP	Lycoming, Union	30 min
Jul 24, 5:04 PM EDT	Special Weather Statement	CTP	McKean, Warren	41 min
Jul 24, 5:30 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Warren	90 min
Jul 24, 5:40 PM EDT	Tornado Warning	CTP	McKean, Warren	50 min
Jul 24, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	65 min
Jul 24, 6:00 PM EDT	Special Weather Statement	CTP	Potter	30 min
Jul 24, 6:20 PM EDT	Tornado Warning	CTP	McKean, Potter	25 min
Jul 24, 6:30 PM EDT	Tornado Warning	CTP	McKean, Potter	30 min
Jul 24, 6:42 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	63 min
Jul 24, 6:48 PM EDT	Tornado Warning	CTP	Potter, Tioga	27 min
Jul 24, 7:02 PM EDT	Areal Flood Advisory	CTP	Cameron, Elk, McKean, Potter, Tioga	3 hr
Jul 24, 7:10 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	50 min
Jul 24, 7:13 PM EDT	Tornado Warning	CTP	Lycoming, Potter, Tioga	47 min
Jul 24, 7:31 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	35 min
Jul 24, 7:45 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter, Sullivan, Tioga	60 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.