Alert archive / Virginia / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 21, NWS Baltimore/Washington

April 29, 1994Madison County, Rappahannock County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 29, 1994, 2:44 PM EDT for Madison County, Rappahannock County, Virginia. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Apr 29, 1994, 2:44 PM EDT (18:44 UTC)
Expired
Apr 29, 1994, 3:15 PM EDT
In force
31 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

Counties Madison County, VA, Rappahannock County, VA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.7 hours before the alert went out and 84 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, Washington/Dulle, VA at 12:00Z on 1994-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 1994-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
860 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KWBC 291843
SVRWBC
VAC157-113-291915-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WASHINGTON DC
244 PM EDT FRI APR 29 1994
 
THE NATIONAL WEATHER SERVICE IN WASHINGTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL VIRGINIA
 
   ...SOUTHERN RAPPAHANNOCK COUNTY
 
IN WEST CENTRAL VIRGINIA
 
   ...NORTHERN MADISON COUNTY
 
WEATHER RADAR WAS SHOWING AN INTENSIFYING STORM IN PAGE
COUNTY...BEGINNING TO ENTER NORTHERN MADISON AND SOUTHERN RAPPAHANNOCK
COUNTY. MOVEMENT WAS EAST AT 30 MPH.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
HITCHENS

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 29, 2:13 PM EDTSevere Thunderstorm WarningLWXShenandoah32 min
Apr 29, 2:32 PM EDTSevere Thunderstorm WarningLWXPage28 min
Apr 29, 3:36 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Augusta54 min
Apr 29, 4:46 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania44 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1994Every severe thunderstorm warning in 1994

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.