Alert archive / Virginia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 13, NWS Baltimore/Washington

April 9, 1998Culpeper County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 9, 1998, 1:36 PM EDT for Culpeper County, Virginia. It was in force for 49 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
Apr 9, 1998, 1:36 PM EDT (17:36 UTC)
Expired
Apr 9, 1998, 2:25 PM EDT
In force
49 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Culpeper County, VA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.6 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, Washington/Dulle, VA at 12:00Z on 1998-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 1998-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 215 square meters per square second.1939587897117Sfc1 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
440 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
215 m²/s²
0-3 km storm-relative helicity
256 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 091736 RRA
SVRWBC
VAC047-091825-

BULLETIN -IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON DC
136 PM EDT THU APR 9 1998

THE BALTIMORE/WASHINGTON DC NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 225 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHERN VIRGINIA

   ...CULPEPER COUNTY
 
AT 134 PM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY
BALTIMORE/WASHINGTON DOPPLER RADAR 2 MILES WEST OF MITCHELLS MOVING
NORTHEAST AT 35 MPH.

THIS STORM IS EXPECTED TO AFFECT THE FOLLOWING COMMUNITIES FROM 134
PM EDT TO 225 PM EDT ... MITCHELLS... MERRIMAC... WINSTON...
NORMAN... CULPEPER... CARDOVA... CATALPA... GREENS CORNER...
BATNA... STEVENSBURG... RIXEYVILLE AND BRANDY STATION.

 A TORNADO WATCH IS ALSO IN EFFECT.  SEVERE THUNDERSTORMS CAN
PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
LARGE HAIL...LIGHTNING...AND HEAVY RAIN.  FOR YOUR PROTECTION MOVE
INDOORS AND STAY AWAY FROM WINDOWS.  HEAVY RAINS FLOOD ROADS
QUICKLY. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

DMW/SMZ

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 1:15 PM EDTSevere Thunderstorm WarningLWXAugusta, Rockingham, City of Staunton, City of Waynesboro45 min
Apr 9, 1:15 PM EDTSevere Thunderstorm WarningLWXCity of Harrisonburg45 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1998Every severe thunderstorm warning in 1998

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.