Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 141, NWS State College, PA

August 1, 2008Somerset County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 1, 2008, 11:59 PM EDT for Somerset County, Pennsylvania. It was in force for 31 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: Aug 1, 2008, 11:59 PM EDT (03:59 UTC)
Expired: Aug 2, 2008, 12:30 AM EDT
In force: 31 min
Issued by: NWS State College, PA
Area: Storm-based polygon

County Somerset County, PA

The radar

The Pittsburgh radar (KPBZ), 119 km from the middle of the area, began a volume at 03:59 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, 4.0 hours before the alert went out and 103 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: 25 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1748 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Aug 1, 10:07 PM EDT, 1 hour 52 minutes earlier.

Area forecast discussion, Aug 1, 10:07 PM EDT, 1 hour 52 minutes before

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Hazardous weather outlook, Aug 1, 1:45 PM EDT, 10 hours 14 minutes before

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In the hours before

Special weather statement, Aug 1, 10:45 PM EDT, 1 hour 14 minutes before

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Special weather statement, Aug 1, 11:10 PM EDT, 49 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
Aug 2, 12:38 AM EDT	Areal Flood Advisory	CTP	Somerset	3 hr
Aug 2, 3:35 AM EDT	Areal Flood Advisory	CTP	Somerset	3 hr
Aug 2, 5:21 AM EDT	Areal Flood Advisory	CTP	Potter, Tioga	3 hr
Aug 2, 6:39 AM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield, Clinton, Elk	66 min
Aug 2, 7:03 AM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	57 min
Aug 2, 7:28 AM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	47 min
Aug 2, 8:44 AM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Schuylkill, Snyder, Union	61 min
Aug 2, 9:40 AM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	42 min
Aug 2, 12:51 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Perry	39 min
Aug 2, 1:11 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin	49 min
Aug 2, 1:28 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	62 min
Aug 2, 2:26 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	52 min
Aug 2, 4:42 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	93 min
Aug 2, 4:47 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	58 min
Aug 2, 5:00 PM EDT	Tornado Warning	CTP	York	60 min
Aug 2, 5:21 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	54 min
Aug 2, 5:39 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	96 min
Aug 2, 6:25 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	65 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2008 Every severe thunderstorm warning in 2008

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.