Alert archive / Virginia / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 21, NWS Blacksburg, VA

May 18, 1993Bedford County, Campbell County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 18, 1993, 9:21 PM EDT for Bedford County, Campbell County, Virginia. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
May 18, 1993, 9:21 PM EDT (01:21 UTC)
Expired
May 18, 1993, 10:30 PM EDT
In force
69 min
Issued by
NWS Blacksburg, VA
Area
Whole counties

Counties Bedford County, VA, Campbell County, VA

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.4 hours before the alert went out and 141 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, Greensboro/Hi Pt, NC at 00:00Z on 1993-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1630 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, Greensboro/Hi Pt, NC at 00:00Z on 1993-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.193958Sfc1 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
1630 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1224 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.8

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KLYH 190121 RRA
SVRLYH
VAC011-019-031-680-190230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LYNCHBURG VA
921 PM EDT TUE MAY 18 1993
 
THE NATIONAL WEATHER SERVICE IN LYNCHBURG HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN SOUTH CENTRAL VIRGINIA
 
   ...APPOMATTOX COUNTY...SOUTHERN BEDFORD COUNTY
   ...CAMPBELL COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...CITY OF LYNCHBURG
 
SMALL HAIL WAS REPORTED WHEN A LINE OF THUNDERSTORMS THAT EXTENDS FROM
EAST OF CHARLOTTSVILLE TO PULASKY COUNTY MOVED THROUGH ROANOKE.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
 
 
CEM
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 8:36 PM EDTSevere Thunderstorm WarningRNKAmherst, Bedford54 min
May 18, 8:44 PM EDTSevere Thunderstorm WarningRNKRoanoke31 min
May 18, 9:21 PM EDTSevere Thunderstorm WarningRNKAppomattox69 min
May 18, 10:22 PM EDTSevere Thunderstorm WarningRNKPittsylvania68 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1993Every severe thunderstorm warning in 1993

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.