Alert archive / Virginia / Flash Flood Warnings in 1996

Flash Flood Warning 49, NWS Baltimore/Washington

June 11, 1996Loudoun County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Jun 11, 1996, 1:04 PM EDT for Loudoun County, Virginia. It was in force for 116 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
Jun 11, 1996, 1:04 PM EDT (17:04 UTC)
Expired
Jun 11, 1996, 3:00 PM EDT
In force
116 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Loudoun County, VA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.1 hours before the alert went out and 26 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 1996-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1188 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, Washington/Dulle, VA at 12:00Z on 1996-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
1188 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
967 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
10 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KWBC 111705
FFWWBC
VAC047-107-061-157-111900-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WASHINGTON DC
104 PM EDT TUE JUN 11 1996
 
THE NATIONAL WEATHER SERVICE IN WASHINGTON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  300 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH VIRGINIA
 
   ...CULPEPER COUNTY...LOUDOUN COUNTY
 
IN NORTH CENTRAL VIRGINIA
 
   ...FAUQUIER COUNTY
 
IN NORTHWEST VIRGINIA
 
   ...RAPPAHANNOCK COUNTY
 
THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE ACROSS THE WARNED AREA. THESE
THUNDERSTORMS ARE PRODUCING AROUND ONE AND HALF INCHES OF RAIN IN ONE
HOUR. THIS RAINFALL OVER ALREADY SATURATED GROUND WILL CAUSE FLASH
FLOODING. SEEK SHELTER IMMEDIATELY IF FLOODING OCCURS.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
 
JAB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 9:34 PM EDTFlash Flood WarningLWXLoudoun56 min
Jun 10, 10:34 PM EDTFlash Flood WarningLWXLoudoun86 min
Jun 11, 11:48 AM EDTFlash Flood WarningLWXMadison42 min
Jun 11, 11:48 AM EDTSevere Thunderstorm WarningLWXMadison42 min
Jun 11, 12:12 PM EDTFlash Flood WarningLWXFauquier, Rappahannock63 min
Jun 11, 12:12 PM EDTFlash Flood WarningLWXGreene63 min
Jun 11, 1:04 PM EDTFlash Flood WarningLWXCulpeper, Fauquier, Rappahannock116 min
Jun 11, 4:30 PM EDTFlash Flood WarningLWXOrange2 hr
Jun 11, 7:47 PM EDTTornado WarningLWXKing George28 min

Nearby

Flash Flood Warnings in Virginia, 1996Every flash flood warning in 1996

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.