Alert archive / West Virginia / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 124, NWS Charleston, WV

September 16, 2010Pocahontas County, Randolph County, West Virginia

NWS Charleston, WV issued this severe thunderstorm warning at Sep 16, 2010, 10:51 PM EDT for Pocahontas County, Randolph County, West Virginia. It was in force for 39 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: Sep 16, 2010, 10:51 PM EDT (02:51 UTC)
Expired: Sep 16, 2010, 11:30 PM EDT
In force: 39 min
Issued by: NWS Charleston, WV
Area: Storm-based polygon

Counties Pocahontas County, WV, Randolph County, WV

The radar

The Charleston,WV radar (KRLX), 157 km from the middle of the area, began a volume at 02:52 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, 2.9 hours before the alert went out and 207 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: 538 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 577 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 299 m²/s²
0-3 km storm-relative helicity: 342 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.7

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 Charleston, WV wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 16, 9:58 PM EDT, 53 minutes earlier.

Area forecast discussion, Sep 16, 9:58 PM EDT, 53 minutes before

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Hazardous weather outlook, Sep 16, 8:39 PM EDT, 2 hours 12 minutes before

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In the hours before

Local storm report, Sep 16, 9:18 PM EDT, 1 hour 33 minutes before

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Local storm report, Sep 16, 9:31 PM EDT, 1 hour 20 minutes before

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Local storm report, Sep 16, 9:37 PM EDT, 1 hour 14 minutes before

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Local storm report, Sep 16, 10:06 PM EDT, 45 minutes before

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Local storm report, Sep 16, 10:07 PM EDT, 44 minutes before

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Local storm report, Sep 16, 10:43 PM EDT, 8 minutes before

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The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 16, 8:23 PM EDT	Tornado Warning	RLX	Calhoun, Gilmer, Wirt, Wood	52 min
Sep 16, 8:24 PM EDT	Severe Thunderstorm Warning	RLX	Barbour, Doddridge, Harrison, Pleasants, Ritchie, Taylor and 1 more	66 min
Sep 16, 9:12 PM EDT	Severe Thunderstorm Warning	RLX	Braxton, Calhoun, Clay, Gilmer, Nicholas, Roane and 1 more	63 min
Sep 16, 9:26 PM EDT	Severe Thunderstorm Warning	RLX	Barbour, Harrison, Lewis, Randolph, Taylor, Upshur	64 min
Sep 16, 10:10 PM EDT	Severe Thunderstorm Warning	RLX	Pocahontas, Webster	65 min
Sep 16, 11:11 PM EDT	Special Weather Statement	RLX	Pocahontas	34 min

Nearby

Severe Thunderstorm Warnings in West Virginia, 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.