Alert archive / Virginia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 21, NWS Blacksburg, VA

March 4, 20088 counties in Virginia; Caswell County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 4, 2008, 9:41 PM EST for 8 counties in Virginia; Caswell County, North Carolina. It was in force for 46 min. 12 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 4, 2008, 9:41 PM EST (02:41 UTC)
Expired
Mar 4, 2008, 10:27 PM EST
In force
46 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon

Counties Caswell County, NC, Amherst County, VA, Appomattox County, VA, Buckingham County, VA, Campbell County, VA, Charlotte County, VA, City of Lynchburg, VA, Halifax County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 133 km from the middle of the area, began a volume at 02:42 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.

What was reported inside it

TimeReportWhereRemark
Mar 4, 9:45 PM ESTTSTM WND DMG4 W Halifax, VATREE DOWN AT MOUNTAIN ROAD IN OAK LEVEL
Mar 4, 9:50 PM ESTTSTM WND DMG4 Sw Nathalie, VATREE DOWN ALONG VOLENS ROAD/HWY 603
Mar 4, 9:57 PM ESTTSTM WND DMG1 W South Boston, VATREE DOWN AT RIVER ROAD
Mar 4, 9:59 PM ESTTSTM WND DMGHalifax, VAHWY 501 BLOCKED BY DOWNED TREE
Mar 4, 10:00 PM ESTTSTM WND DMG4 Ne Virgilina, VATREE DOWN BUCK SHOAL ROAD
Mar 4, 10:00 PM ESTTSTM WND DMGScottsburg, VATREE DOWN
Mar 4, 10:04 PM ESTTSTM WND DMG3 E Halifax, VATREE DOWN AT HWY 626 AND HWY 360
Mar 4, 10:12 PM ESTTSTM WND DMG1 N Cluster Springs, VATREE DOWN AT HWY 501 AND HORSESHOE TRAIL
Mar 4, 10:15 PM ESTTSTM WND DMG2 N Virgilina, VATREES AND POWER LINES DOWN AT INTERSECTION OF BOWEN RD AND HUDSON ROAD
Mar 4, 10:15 PM ESTTSTM WND DMG4 E Clover, VAON HWY 360
Mar 4, 10:20 PM ESTTSTM WND DMG3 E Dillwyn, VATREES DOWN ALONG OLD TOWER HILL ROAD.
Mar 4, 10:34 PM ESTTSTM WND DMGVirgilina, VATREE DOWN ALONG VIRGILINA ROAD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 4, 4:31 PM ESTTornado WatchSPC8 hr
Mar 4, 5:53 PM ESTTornado WatchSPC9 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 2.7 hours before the alert went out and 71 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-pSkew-T log-p diagram, Roanoke, VA at 00:00Z on 2008-03-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 00:00Z on 2008-03-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 338 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
83 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
338 m²/s²
0-3 km storm-relative helicity
363 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KRNK 050241
SVRRNK
NCC033-VAC009-011-029-031-037-083-143-680-050345-
/O.NEW.KRNK.SV.W.0021.080305T0241Z-080305T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
941 PM EST TUE MAR 4 2008

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA
  HALIFAX COUNTY IN SOUTH CENTRAL VIRGINIA
  CHARLOTTE COUNTY IN SOUTH CENTRAL VIRGINIA
  EASTERN CAMPBELL COUNTY IN CENTRAL VIRGINIA
  CITY OF LYNCHBURG IN CENTRAL VIRGINIA  
  APPOMATTOX COUNTY IN CENTRAL VIRGINIA
  SOUTHERN BUCKINGHAM COUNTY IN CENTRAL VIRGINIA
  SOUTH CENTRAL AMHERST COUNTY IN CENTRAL VIRGINIA
  SOUTHEASTERN PITTSYLVANIA COUNTY IN SOUTH CENTRAL VIRGINIA

* UNTIL 1045 PM EST.

* AT 938 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM CONCORD TO BROOKNEAL TO JERICHO...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MILTON...
  STONEWALL...
  OAKVILLE...
  APPOMATTOX NATIONAL HISTORIC PARK...
  SOUTH BOSTON...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

PLEASE SEND YOUR REPORTS OF PENNY OR LARGER SIZED HAIL...AS WELL AS
WIND DAMAGE...INCLUDING TREES OR LARGE LIMBS DOWNED BY CALLING THE
NATIONAL WEATHER SERVICE TOLL FREE AT...1...8 6 6...2 1 5...4 3 2 4.

LAT...LON 3734 7846 3732 7851 3737 7858 3726 7867
      3716 7861 3708 7844 3690 7848 3672 7862
      3663 7855 3668 7868 3654 7875 3654 7913
      3624 7915 3624 7946 3624 7947 3670 7918
      3700 7906 3744 7914 3757 7830
TIME...MOT...LOC 0241Z 259DEG 39KT 3737 7900 3702 7894
          3627 7936

$$

WP
1 follow-up statement
000 
WWUS51 KRNK 050327
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1023 PM EST TUE MAR 4 2008

NCC033-VAC009-011-029-031-037-083-143-680-050333-
/O.CAN.KRNK.SV.W.0021.000000T0000Z-080305T0345Z/
CASWELL NC-HALIFAX VA-CHARLOTTE VA-CAMPBELL VA-CITY OF LYNCHBURG VA-
APPOMATTOX VA-BUCKINGHAM VA-AMHERST VA-PITTSYLVANIA VA-
1023 PM EST TUE MAR 4 2008

...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF LYNCHBURG...
SOUTHEASTERN PITTSYLVANIA...SOUTHERN AMHERST...SOUTHERN BUCKINGHAM...
APPOMATTOX...EASTERN CAMPBELL...CHARLOTTE...HALIFAX AND EASTERN
CASWELL COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE 
AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...INCLUDING WIND DAMAGE...PLEASE CONTACT 
THE NATIONAL WEATHER SERVICE IN BLACKSBURG AT...TOLL FREE...1 8 6 
6...2 1 5...4 3 2 4.

LAT...LON 3734 7846 3732 7851 3737 7858 3726 7867
      3716 7861 3708 7844 3690 7848 3672 7862
      3663 7855 3668 7868 3654 7875 3654 7913
      3624 7915 3624 7946 3624 7947 3670 7918
      3700 7906 3744 7914 3757 7830
TIME...MOT...LOC 0323Z 259DEG 39KT 3746 7844 3711 7838
          3636 7880

$$

WP

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 4, 7:11 PM ESTSevere Thunderstorm WarningRNKCarroll, Floyd, Grayson, Patrick, Pulaski, Wythe and 1 more49 min
Mar 4, 7:33 PM ESTSevere Thunderstorm WarningRNKFloyd, Franklin, Henry, Patrick, City of Martinsville42 min
Mar 4, 7:51 PM ESTSevere Thunderstorm WarningRNKAlleghany, Bath, Botetourt, Craig, Floyd, Franklin and 8 more54 min
Mar 4, 8:15 PM ESTSevere Thunderstorm WarningRNKAmherst, Bedford, Botetourt, Campbell, Franklin, Henry and 4 more60 min
Mar 4, 8:18 PM ESTAreal Flood AdvisoryRNKFranklin, Montgomery, Roanoke, City of Roanoke, City of Salem3 hr
Mar 4, 8:22 PM ESTTornado WarningRNKBedford, Campbell, Franklin, Henry, Pittsylvania23 min
Mar 4, 8:38 PM ESTSevere Thunderstorm WarningRNKHenry, Patrick, Pittsylvania, City of Danville67 min
Mar 4, 8:47 PM ESTSevere Thunderstorm WarningRNKAlleghany, Bath, Bedford, Botetourt, Craig, Roanoke and 4 more50 min
Mar 4, 9:07 PM ESTSevere Thunderstorm WarningRNKAmherst, Rockbridge, City of Buena Vista23 min
Mar 4, 9:40 PM ESTAreal Flood WarningRNKBland7 hr
Mar 4, 9:55 PM ESTAreal Flood WarningRNKSmyth, Tazewell10 hr
Mar 4, 10:47 PM ESTAreal Flood WarningRNKBath7 hr
Mar 4, 7:37 PM ESTSevere Thunderstorm WarningRNKSurry, Wilkes, Yadkin23 min
Mar 4, 9:45 PM ESTAreal Flood WarningRNKWatauga3 hr
Mar 5, 12:44 AM ESTAreal Flood WarningRNKWatauga7 hr
Mar 5, 7:47 AM ESTAreal Flood WarningRNKWatauga4 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 2008Severe Thunderstorm Warnings in North Carolina, 2008Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.