Alert archive / Virginia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 114, NWS Blacksburg, VA

July 7, 20134 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 7, 2013, 2:20 PM EDT for 4 counties in Virginia. It was in force for 55 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 7, 2013, 2:20 PM EDT (18:20 UTC)
Expired: Jul 7, 2013, 3:15 PM EDT
In force: 55 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Bland County, VA, Giles County, VA, Pulaski County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 57 km from the middle of the area, began a volume at 18:19 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.3 hours before the alert went out and 145 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: 470 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 547 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 Jul 7, 1:16 PM EDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jul 7, 1:16 PM EDT, 1 hour 4 minutes before

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Hazardous weather outlook, Jul 7, 9:44 AM EDT, 4 hours 36 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
944 AM EDT SUN JUL 7 2013

NCZ003-VAZ011-013-014-016>020-022>024-032>035-WVZ044-081345-
SURRY-GILES-PULASKI-MONTGOMERY-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-
ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-FRANKLIN-BEDFORD-AMHERST-MONROE-
944 AM EDT SUN JUL 7 2013

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...

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

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

 FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ004>006-020-VAZ043>047-058-059-081345-
STOKES-ROCKINGHAM-CASWELL-YADKIN-HENRY-PITTSYLVANIA-CAMPBELL-
APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-
944 AM EDT SUN JUL 7 2013

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 ARE EXPECTED THIS AFTERNOON INTO
MONDAY. A FEW STORMS WILL PRODUCE HEAVY RAIN AND LOCALIZED
FLOODING IS POSSIBLE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ001-002-019-VAZ007-009-010-012-015-WVZ042-043-045-081345-
ASHE-ALLEGHANY NC-WILKES-TAZEWELL-SMYTH-BLAND-WYTHE-GRAYSON-MERCER-
SUMMERS-GREENBRIER-
944 AM EDT SUN JUL 7 2013

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

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

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ018-081345-
WATAUGA-
944 AM EDT SUN JUL 7 2013

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

THE WATAUGA RIVER AT SUGAR GROVE IS ABOVE FLOOD STAGE. AT 800 AM
THE STAGE WAS 8.1 FEET AND FALLING. FLOOD STAGE IS 6.0 FEET.
ADDITIONAL RISES ARE LIKELY THIS AFTERNOON WHEN MORE RAIN
ENTERS THE AREA.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

RCS

In the hours before

Special weather statement, Jul 7, 11:47 AM EDT, 2 hours 33 minutes before

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Special weather statement, Jul 7, 12:35 PM EDT, 1 hour 45 minutes before

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Special weather statement, Jul 7, 12:49 PM EDT, 1 hour 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1249 PM EDT SUN JUL 7 2013

WVZ045-071730-
GREENBRIER WV-
1249 PM EDT SUN JUL 7 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR... CENTRAL AND NORTHERN
  GREENBRIER COUNTY IN SOUTHEAST WEST VIRGINIA...

* UNTIL 130 PM EDT

* AT 1243 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
  TRACKING STRONG SHOWERS AND THUNDERSTORMS ALONG A LINE EXTENDING
  FROM DUO TO LAWN...MOVING TO THE NORTHEAST AT 35 MPH.

* WIND GUSTS UP TO 30 MPH ARE EXPECTED WITH THESE STORMS. HEAVY RAIN
  WILL CAUSE WATER TO QUICKLY POND ON ROADWAYS AND FILL ROADSIDE
  DITCHES.

* LOCATIONS IMPACTED INCLUDE...
  RUPERT...
  RENICK...
  MAXWELTON...
  ASBURY...
  AND ANJEAN.

LAT...LON 3823 8036 3811 8036 3807 8030 3806 8030
      3776 8048 3773 8051 3782 8073 3787 8080
      3787 8075 3791 8079 3807 8072 3827 8044
TIME...MOT...LOC 1643Z 223DEG 31KT 3812 8057 3788 8075

CF

Special weather statement, Jul 7, 1:37 PM EDT, 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
137 PM EDT SUN JUL 7 2013

WVZ045-071815-
GREENBRIER WV-
137 PM EDT SUN JUL 7 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  CENTRAL GREENBRIER COUNTY IN SOUTHEAST WEST VIRGINIA...

* UNTIL 215 PM EDT

* AT 134 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
  TRACKING STRONG SHOWERS AND THUNDERSTORMS ALONG A LINE EXTENDING
  FROM WILLIAMSBURG TO ALDERSON...MOVING TO THE NORTHEAST AT 30 MPH.

* WIND GUSTS UP TO 30 MPH ARE EXPECTED WITH THESE STORMS. HEAVY RAIN
  WILL QUICKLY CAUSE WATER TO POND ON ROADWAYS AND FILL ROADSIDE
  DITCHES.

* LOCATIONS IMPACTED INCLUDE...
  LEWISBURG...
  RONCEVERTE...
  RENICK...
  MAXWELTON...
  AND LEWISBURG AIRPORT.

LAT...LON 3816 8036 3811 8036 3805 8027 3804 8016
      3806 8011 3805 8006 3769 8044 3769 8047
      3784 8076 3817 8038
TIME...MOT...LOC 1734Z 223DEG 36KT 3795 8047 3775 8067

CF

Special weather statement, Jul 7, 1:58 PM EDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
158 PM EDT SUN JUL 7 2013

VAZ010>013-WVZ042-071900-
GILES VA-BLAND VA-WYTHE VA-PULASKI VA-MERCER WV-
158 PM EDT SUN JUL 7 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  GILES COUNTY IN SOUTHWEST VIRGINIA...
  BLAND COUNTY IN SOUTHWEST VIRGINIA...
  WYTHE COUNTY IN SOUTHWEST VIRGINIA...
  PULASKI COUNTY IN SOUTHWEST VIRGINIA...
  SOUTHEASTERN MERCER COUNTY IN SOUTHEAST WEST VIRGINIA...

* UNTIL 300 PM EDT

* AT 156 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM WILLOWTON TO
  COMERS ROCK...MOVING TO THE EAST AT 15 MPH.

* WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS. VERY HEAVY
  RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON ROADWAYS AND
  QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

* LOCATIONS IMPACTED INCLUDE...
  RADFORD...
  ROCKY GAP...
  ALLISONIA...
  PULASKI...
  AND BLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

THESE STORMS MAY INTENSIFY...SO MONITOR LOCAL RADIO AND TELEVISION
FOR ADDITIONAL INFORMATION...AND POSSIBLE WARNINGS...FROM THE
NATIONAL WEATHER SERVICE.

&&

LAT...LON 3750 8096 3737 8077 3748 8055 3747 8050
      3732 8044 3723 8061 3719 8059 3720 8051
      3718 8056 3714 8053 3712 8059 3706 8054
      3697 8055 3689 8068 3690 8076 3685 8081
      3681 8103 3677 8109 3677 8127 3691 8133
TIME...MOT...LOC 1756Z 255DEG 11KT 3732 8090 3677 8119

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:02 PM EDT	Special Weather Statement	RNK	Henry, Patrick, City of Danville, City of Martinsville	43 min
Jul 6, 8:46 PM EDT	Special Weather Statement	RNK	Carroll, Floyd, Franklin, Henry, Patrick, Pittsylvania and 2 more	59 min
Jul 6, 9:47 PM EDT	Special Weather Statement	RNK	Franklin, City of Roanoke, City of Salem	58 min
Jul 7, 12:35 PM EDT	Special Weather Statement	RNK	Tazewell	55 min
Jul 7, 1:58 PM EDT	Special Weather Statement	RNK	Bland, Giles, Pulaski, Wythe	62 min
Jul 7, 2:34 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, Botetourt, Rockbridge, City of Buena Vista, City of Covington and 1 more	56 min
Jul 7, 2:40 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	65 min
Jul 7, 2:46 PM EDT	Areal Flood Advisory	RNK	Grayson, Patrick, City of Galax	3 hr
Jul 7, 3:10 PM EDT	Special Weather Statement	RNK	Craig, Montgomery, Pulaski, Roanoke, City of Radford, City of Roanoke and 1 more	65 min
Jul 7, 3:12 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, Pulaski, Wythe	63 min
Jul 7, 4:24 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Montgomery, Pulaski, Wythe, City of Galax and 1 more	3 hr
Jul 7, 4:35 PM EDT	Special Weather Statement	RNK	Amherst, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	55 min
Jul 7, 6:35 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Grayson, Patrick	4 hr
Jul 7, 7:14 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Montgomery, Pulaski, Wythe, City of Galax and 1 more	3 hr
Jul 7, 7:21 PM EDT	Special Weather Statement	RNK	Charlotte, Halifax	39 min
Jul 7, 7:34 PM EDT	Special Weather Statement	RNK	City of Martinsville	41 min
Jul 6, 8:17 PM EDT	Areal Flood Advisory	RNK	Watauga	3 hr
Jul 7, 4:21 AM EDT	Areal Flood Warning	RNK	Watauga	6 hr
Jul 7, 4:45 PM EDT	Flash Flood Warning	RNK	Ashe, Watauga, Wilkes	3 hr
Jul 7, 7:45 PM EDT	Areal Flood Warning	RNK	Ashe, Watauga, Wilkes	4 hr
Jul 7, 7:59 PM EDT	Special Weather Statement	RNK	Stokes	46 min
Jul 7, 11:47 AM EDT	Special Weather Statement	RNK	Greenbrier	58 min
Jul 7, 12:49 PM EDT	Special Weather Statement	RNK	Greenbrier	41 min
Jul 7, 1:37 PM EDT	Special Weather Statement	RNK	Greenbrier	38 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2013 Every severe thunderstorm warning in 2013

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.