Alert archive / Virginia / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 16, NWS Blacksburg, VA

April 5, 2010Alleghany County, Craig County, Giles County, Virginia; Monroe County, West Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 5, 2010, 8:19 PM EDT for Alleghany County, Craig County, Giles County, Virginia; Monroe 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: Apr 5, 2010, 8:19 PM EDT (00:19 UTC)
Expired: Apr 5, 2010, 8:47 PM EDT
In force: 28 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, VA, Craig County, VA, Giles County, VA, Monroe County, WV

The radar

The Roanoke radar (KFCX), 57 km from the middle of the area, began a volume at 00:19 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, 0.3 hours before the alert went out and 85 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 Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 5, 7:37 PM EDT, 42 minutes earlier.

Area forecast discussion, Apr 5, 7:37 PM EDT, 42 minutes before

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Hazardous weather outlook, Apr 5, 6:31 AM EDT, 13 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
631 AM EDT MON APR 5 2010

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-061045-
ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES-
YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON-
CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-
PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-
APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE-
GREENBRIER-
631 AM EDT MON APR 5 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...NORTHWEST NORTH CAROLINA...CENTRAL VIRGINIA...SOUTH
CENTRAL VIRGINIA...SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Apr 5, 7:48 PM EDT, 31 minutes before

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Local storm report, Apr 5, 7:49 PM EDT, 30 minutes before

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Local storm report, Apr 5, 7:50 PM EDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
750 PM EDT MON APR 05 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0710 PM     HAIL             MAYODAN                 36.42N 79.97W
04/05/2010  E0.50 INCH       ROCKINGHAM         NC   PUBLIC

&&

TW

Local storm report, Apr 5, 7:52 PM EDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
752 PM EDT MON APR 05 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0735 PM     TSTM WND DMG     REIDSVILLE              36.35N 79.67W
04/05/2010                   ROCKINGHAM         NC   COUNTY OFFICIAL

            TREES DOWN OVER WESTERN PART OF COUNTY. 911 CENTER.

&&

TW

Local storm report, Apr 5, 7:53 PM EDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
753 PM EDT MON APR 05 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0735 PM     HAIL             REIDSVILLE              36.35N 79.67W
04/05/2010  E1.00 INCH       ROCKINGHAM         NC   COUNTY OFFICIAL

            OVER WESTERN PART OF COUNTY. 911 CENTER.

&&

TW

Local storm report, Apr 5, 8:19 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
819 PM EDT MON APR 05 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0815 PM     HAIL             BLUEFIELD               37.24N 81.27W
04/05/2010  E0.50 INCH       TAZEWELL           VA   TRAINED SPOTTER

&&

TW

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 5, 10:19 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, Craig, City of Covington	56 min
Apr 5, 11:29 PM EDT	Special Weather Statement	RNK	Botetourt	16 min
Apr 5, 11:53 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt, Craig, Rockbridge, City of Covington and 1 more	52 min
Apr 5, 11:56 PM EDT	Severe Thunderstorm Warning	RNK	Giles	79 min
Apr 6, 12:42 AM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bedford, Botetourt, Craig, Roanoke, Rockbridge	33 min
Apr 6, 1:16 AM EDT	Special Weather Statement	RNK	Craig	29 min
Apr 6, 1:17 AM EDT	Special Weather Statement	RNK	Amherst, Bedford, Campbell, City of Lynchburg	28 min
Apr 6, 1:44 AM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell, Charlotte	61 min
Apr 6, 2:48 AM EDT	Special Weather Statement	RNK	Bath	57 min
Apr 5, 9:32 PM EDT	Special Weather Statement	RNK	Caswell, Rockingham	58 min
Apr 5, 9:33 PM EDT	Severe Thunderstorm Warning	RNK	Greenbrier, Summers	57 min
Apr 5, 10:36 PM EDT	Severe Thunderstorm Warning	RNK	Greenbrier	84 min
Apr 5, 11:16 PM EDT	Special Weather Statement	RNK	Monroe	29 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2010 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.