Alert archive / Virginia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 127, NWS Blacksburg, VA

August 11, 20157 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 11, 2015, 2:52 PM EDT for 7 counties in Virginia. It was in force for 53 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 11, 2015, 2:52 PM EDT (18:52 UTC)
Expired: Aug 11, 2015, 3:45 PM EDT
In force: 53 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Amherst County, VA, Appomattox County, VA, Bedford County, VA, Campbell County, VA, Charlotte County, VA, City of Lynchburg, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 106 km from the middle of the area, began a volume at 18:55 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 12:00Z, 6.9 hours before the alert went out and 35 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: 153 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 656 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Aug 11, 2:51 PM EDT, 1 minute earlier.

Area forecast discussion, Aug 11, 2:51 PM EDT, 1 minute before

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Hazardous weather outlook, Aug 11, 3:51 AM EDT, 11 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
351 AM EDT TUE AUG 11 2015

NCZ001>003-018-019-VAZ007-009>020-022>024-032>035-WVZ042>044-507-508-
120800-
ASHE-ALLEGHANY NC-SURRY-WATAUGA-WILKES-TAZEWELL-SMYTH-BLAND-GILES-
WYTHE-PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-
BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-FRANKLIN-BEDFORD-AMHERST-
MERCER-SUMMERS-MONROE-EASTERN GREENBRIER-WESTERN GREENBRIER-
351 AM EDT TUE AUG 11 2015

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.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ004>006-020-VAZ043>047-058-059-120800-
STOKES-ROCKINGHAM-CASWELL-YADKIN-HENRY-PITTSYLVANIA-CAMPBELL-
APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-
351 AM EDT TUE AUG 11 2015

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

.DAY ONE...TODAY AND TONIGHT.

SHOWERS AND THUNDERSTORMS WILL PRECEDE A COLD FRONT MOVING
THROUGH THE REGION THIS AFTERNOON. A FEW STRONG TO SEVERE
THUNDERSTORMS ACCOMPANIED BY LARGE HAIL AND DAMAGING WINDS WILL BE
POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Aug 11, 2:30 PM EDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
230 PM EDT TUE AUG 11 2015

VAZ012-013-015>017-111930-
WYTHE-FLOYD-CARROLL-PULASKI-GRAYSON-
230 PM EDT TUE AUG 11 2015

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN
PULASKI...NORTHEASTERN GRAYSON...WEST CENTRAL FLOYD... SOUTHERN
WYTHE AND NORTHERN CARROLL COUNTIES...

AT 229 PM EDT...A STRONG THUNDERSTORM WAS OVER CRIPPLE CREEK...MOVING
EAST AT 20 MPH.

WINDS IN EXCESS OF 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
HILLSVILLE...
ALLISONIA...
PATTERSON...
SPEEDWELL...
AND GRAHAMS FORGE.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 3701 8057 3674 8052 3672 8125 3688 8127
TIME...MOT...LOC 1829Z 261DEG 19KT 3683 8106

KK

Special weather statement, Aug 11, 2:34 PM EDT, 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
234 PM EDT TUE AUG 11 2015

VAZ035-045>047-111930-
BUCKINGHAM-APPOMATTOX-CAMPBELL-AMHERST-
234 PM EDT TUE AUG 11 2015

...A STRONG THUNDERSTORM WILL AFFECT APPOMATTOX...SOUTHEASTERN
AMHERST...SOUTHWESTERN BUCKINGHAM... NORTHEASTERN CAMPBELL AND CITY
OF LYNCHBURG COUNTIES...

AT 233 PM EDT...A STRONG THUNDERSTORM WAS OVER LYNCHBURG...MOVING
EAST AT 25 MPH.

WIND GUSTS UP TO 50 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
LYNCHBURG...
BUCKINGHAM...
APPOMATTOX...
DILLWYN...
AND LYNCHBURG CITY.

THIS INCLUDES LIBERTY UNIVERSITY AND LYNCHBURG AIRPORT.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 3733 7849 3736 7858 3740 7859 3734 7860
      3725 7868 3722 7873 3734 7926 3739 7923
      3741 7926 3742 7925 3745 7927 3747 7918
      3751 7922 3749 7926 3751 7928 3752 7923
      3755 7886 3754 7883 3755 7882 3758 7843
TIME...MOT...LOC 1833Z 279DEG 29KT 3741 7921

KK

Special weather statement, Aug 11, 2:39 PM EDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
239 PM EDT TUE AUG 11 2015

NCZ001>003-VAZ009-015-016-111945-
ASHE-ALLEGHANY-SURRY-SMYTH-CARROLL-GRAYSON-
239 PM EDT TUE AUG 11 2015

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN SURRY...NORTHERN
ASHE...ALLEGHANY...GRAYSON... SOUTHEASTERN SMYTH AND CITY OF GALAX
COUNTIES...

AT 238 PM EDT...A STRONG THUNDERSTORM WAS OVER MOUNT ROGERS SUMMIT...
MOVING EAST AT 30 MPH.

WINDS IN EXCESS OF 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
GALAX...
SPARTA...
INDEPENDENCE...
FRIES...
AND LANSING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 3656 8169 3657 8169 3657 8168 3659 8168
      3661 8165 3662 8162 3663 8160 3664 8161
      3664 8162 3672 8167 3676 8165 3671 8087
      3641 8092 3653 8171
TIME...MOT...LOC 1838Z 279DEG 28KT 3665 8159

KK

Local storm report, Aug 11, 2:45 PM EDT, 7 minutes before

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Special weather statement, Aug 11, 2:45 PM EDT, 7 minutes before

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Local storm report, Aug 11, 2:50 PM EDT, 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 8:29 PM EDT	Special Weather Statement	RNK	Alleghany, Botetourt, Craig, Giles, Roanoke, Rockbridge and 5 more	61 min
Aug 10, 9:10 PM EDT	Special Weather Statement	RNK	Patrick	65 min
Aug 10, 9:32 PM EDT	Special Weather Statement	RNK	Botetourt, Craig, Montgomery, Pulaski, Roanoke, City of Radford and 2 more	73 min
Aug 10, 9:42 PM EDT	Special Weather Statement	RNK	Pittsylvania	63 min
Aug 10, 9:58 PM EDT	Special Weather Statement	RNK	Bedford	62 min
Aug 10, 10:44 PM EDT	Special Weather Statement	RNK	Bedford, Botetourt	46 min
Aug 11, 12:35 PM EDT	Special Weather Statement	RNK	Tazewell	40 min
Aug 11, 12:45 PM EDT	Special Weather Statement	RNK	Bland	45 min
Aug 11, 1:08 PM EDT	Special Weather Statement	RNK	City of Buena Vista	37 min
Aug 11, 1:28 PM EDT	Special Weather Statement	RNK	Montgomery, Pulaski, City of Radford	32 min
Aug 11, 1:38 PM EDT	Special Weather Statement	RNK	Botetourt	37 min
Aug 11, 1:45 PM EDT	Special Weather Statement	RNK	Buckingham	30 min
Aug 11, 1:50 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	25 min
Aug 11, 1:58 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Roanoke, City of Roanoke, City of Salem	47 min
Aug 11, 2:15 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge	44 min
Aug 11, 2:27 PM EDT	Special Weather Statement	RNK	Franklin	63 min
Aug 11, 2:28 PM EDT	Special Weather Statement	RNK	City of Danville	62 min
Aug 11, 2:30 PM EDT	Special Weather Statement	RNK	Wythe	60 min
Aug 11, 2:34 PM EDT	Special Weather Statement	RNK	Appomattox, City of Lynchburg	56 min
Aug 11, 2:39 PM EDT	Special Weather Statement	RNK	Grayson, City of Galax	66 min
Aug 11, 2:45 PM EDT	Special Weather Statement	RNK	Bedford, Campbell	60 min
Aug 11, 3:03 PM EDT	Special Weather Statement	RNK	Cumberland	57 min
Aug 11, 3:22 PM EDT	Special Weather Statement	RNK	Halifax	68 min
Aug 11, 3:32 PM EDT	Special Weather Statement	RNK	Appomattox, Charlotte	58 min
Aug 11, 3:38 PM EDT	Special Weather Statement	RNK	Pittsylvania, City of Danville, City of Martinsville	67 min
Aug 11, 3:43 PM EDT	Special Weather Statement	RNK	Henry	62 min
Aug 11, 4:12 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Pittsylvania, City of Danville, City of Martinsville	63 min
Aug 11, 4:22 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax, Pittsylvania	68 min
Aug 10, 8:05 PM EDT	Special Weather Statement	RNK	Stokes	55 min
Aug 10, 9:16 PM EDT	Special Weather Statement	RNK	Rockingham	74 min
Aug 11, 3:10 PM EDT	Special Weather Statement	RNK	Caswell	65 min
Aug 11, 3:18 PM EDT	Special Weather Statement	RNK	Ashe, Wilkes	57 min
Aug 11, 3:46 PM EDT	Special Weather Statement	RNK	Stokes	59 min
Aug 11, 4:56 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	79 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2015 Every severe thunderstorm warning in 2015

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.