Alert archive / West Virginia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 137, NWS Pittsburgh, PA

July 20, 2008Marion County, Monongalia County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 20, 2008, 6:13 PM EDT for Marion County, Monongalia County, West Virginia. It was in force for 28 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 20, 2008, 6:13 PM EDT (22:13 UTC)
Expired: Jul 20, 2008, 6:41 PM EDT
In force: 28 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Marion County, WV, Monongalia County, WV

The radar

The Pittsburgh radar (KPBZ), 107 km from the middle of the area, began a volume at 22:13 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 12:00Z, 10.2 hours before the alert went out and 93 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: 195 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1059 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 4:33 PM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jul 20, 4:33 PM EDT, 1 hour 40 minutes before

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Hazardous weather outlook, Jul 20, 4:19 PM EDT, 1 hour 54 minutes before

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In the hours before

Local storm report, Jul 20, 3:59 PM EDT, 2 hours 14 minutes before

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Local storm report, Jul 20, 4:16 PM EDT, 1 hour 57 minutes before

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Local storm report, Jul 20, 4:32 PM EDT, 1 hour 41 minutes before

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Local storm report, Jul 20, 4:36 PM EDT, 1 hour 37 minutes before

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Local storm report, Jul 20, 5:05 PM EDT, 1 hour 8 minutes before

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Local storm report, Jul 20, 5:38 PM EDT, 35 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 1:13 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Washington	62 min
Jul 20, 1:56 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Washington	64 min
Jul 20, 2:18 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Fayette, Indiana, Washington and 1 more	57 min
Jul 20, 2:28 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	62 min
Jul 20, 3:04 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Fayette, Greene, Indiana, Jefferson, Westmoreland	56 min
Jul 20, 3:20 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	55 min
Jul 20, 4:07 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	53 min
Jul 20, 4:16 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	59 min
Jul 20, 5:12 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	63 min
Jul 20, 4:41 PM EDT	Severe Thunderstorm Warning	PBZ	Monongalia, Preston	64 min

Nearby

Severe Thunderstorm Warnings in West Virginia, 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.