Alert archive / West Virginia / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 10, NWS Charleston, WV

April 6, 2010Pocahontas County, West Virginia

NWS Charleston, WV issued this severe thunderstorm warning at Apr 6, 2010, 2:31 AM EDT for Pocahontas County, West Virginia. It was in force for 29 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: Apr 6, 2010, 2:31 AM EDT (06:31 UTC)
Expired: Apr 6, 2010, 3:00 AM EDT
In force: 29 min
Issued by: NWS Charleston, WV
Area: Storm-based polygon

County Pocahontas County, WV

The radar

The Roanoke radar (KFCX), 147 km from the middle of the area, began a volume at 06:33 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

Roanoke, VA (KRNK), launched 00:00Z, 6.5 hours before the alert went out and 134 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: 784 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1578 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.8

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 Apr 6, 1:40 AM EDT, 51 minutes earlier.

Area forecast discussion, Apr 6, 1:40 AM EDT, 51 minutes before

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Hazardous weather outlook, Apr 5, 11:50 PM EDT, 2 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON WV
1150 PM EDT MON APR 5 2010

KYZ101>103-105-OHZ087-VAZ003-004-WVZ005-006-013-015-024>026-033>036-
046-070400-
GREENUP-CARTER-BOYD-LAWRENCE KY-LAWRENCE OH-DICKENSON-BUCHANAN-WAYNE-
CABELL-LINCOLN-KANAWHA-MINGO-LOGAN-BOONE-MCDOWELL-WYOMING-RALEIGH-
FAYETTE-POCAHONTAS-
1150 PM EDT MON APR 5 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST
KENTUCKY...SOUTHEAST OHIO...SOUTHWEST VIRGINIA AND WEST VIRGINIA.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

FOR AREAS NOT RECEIVING RAINFALL OVERNIGHT...DRY SOUTHWEST WINDS
AND LOW HUMIDITY LEVELS TUESDAY AFTERNOON COULD CREATE WILDFIRE
POTENTIAL...ALTHOUGH VALUES WILL BE MARGINAL FOR A CRITICAL FIRE
DANGER. IF THE THREAT OF STRONGER WINDS OR LOWER HUMIDITY VALUES
INCREASES...A RED FLAG WARNING COULD BE NEEDED FOR TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

OHZ066-067-075-076-083>086-WVZ007>011-014-016>020-027>032-037>040-
047-070400-
PERRY-MORGAN-ATHENS-WASHINGTON-JACKSON OH-VINTON-MEIGS-GALLIA-MASON-
JACKSON WV-WOOD-PLEASANTS-TYLER-PUTNAM-ROANE-WIRT-CALHOUN-RITCHIE-
DODDRIDGE-CLAY-BRAXTON-GILMER-LEWIS-HARRISON-TAYLOR-NICHOLAS-WEBSTER-
UPSHUR-BARBOUR-RANDOLPH-
1150 PM EDT MON APR 5 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST OHIO AND WEST
VIRGINIA.

.DAY ONE...TONIGHT.

THUNDERSTORMS OVERNIGHT MAY STILL PRODUCE LARGE HAIL...FREQUENT
LIGHTNING...AND STRONG GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

FOR AREAS THAT DO NOT RECEIVE RAINFALL OVERNIGHT...DRY SOUTHWEST
WINDS AND LOW HUMIDITY LEVELS TUESDAY AFTERNOON COULD CREATE
WILDFIRE POTENTIAL...ALTHOUGH VALUES WILL BE MARGINAL FOR A
CRITICAL FIRE DANGER. IF THE THREAT OF STRONGER WINDS OR LOWER
HUMIDITY VALUES INCREASES...A RED FLAG WARNING COULD BE NEEDED FOR
TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT SEVERE WEATHER.

In the hours before

Local storm report, Apr 6, 12:36 AM EDT, 1 hour 55 minutes before

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Local storm report, Apr 6, 12:37 AM EDT, 1 hour 54 minutes before

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Local storm report, Apr 6, 12:43 AM EDT, 1 hour 48 minutes before

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Local storm report, Apr 6, 12:47 AM EDT, 1 hour 44 minutes before

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Special weather statement, Apr 6, 12:55 AM EDT, 1 hour 36 minutes before

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Special weather statement, Apr 6, 2:18 AM EDT, 13 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
Apr 5, 8:28 PM EDT	Severe Thunderstorm Warning	RLX	Wayne	47 min
Apr 5, 9:10 PM EDT	Severe Thunderstorm Warning	RLX	Fayette, Raleigh	35 min
Apr 5, 9:18 PM EDT	Severe Thunderstorm Warning	RLX	Cabell, Lincoln, Wayne	42 min
Apr 5, 9:57 PM EDT	Severe Thunderstorm Warning	RLX	Lincoln, Logan, Wayne	48 min
Apr 5, 11:50 PM EDT	Severe Thunderstorm Warning	RLX	Jackson, Mason	40 min
Apr 6, 12:28 AM EDT	Severe Thunderstorm Warning	RLX	Jackson, Roane	31 min
Apr 5, 11:06 PM EDT	Severe Thunderstorm Warning	RLX	Gallia, Jackson, Meigs, Vinton	54 min
Apr 5, 8:50 PM EDT	Severe Thunderstorm Warning	RLX	Boyd, Carter, Lawrence	40 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.