Alert archive / West Virginia / Flash Flood Warnings in 2002

Flash Flood Warning 21, NWS Baltimore/Washington

July 23, 2002Hardy County, West Virginia

NWS Baltimore/Washington issued this flash flood warning at Jul 23, 2002, 4:36 PM EDT for Hardy County, West Virginia. It was in force for 84 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: Jul 23, 2002, 4:36 PM EDT (20:36 UTC)
Expired: Jul 23, 2002, 6:00 PM EDT
In force: 84 min
Issued by: NWS Baltimore/Washington
Area: Whole counties

County Hardy County, WV

The radar

The Sterling radar (KLWX), 118 km from the middle of the area, began a volume at 20:38 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.6 hours before the alert went out and 126 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 357 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 69 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 
WGUS51 KLWX 232036
FFWLWX
WVC031-232200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
436 PM EDT TUE JUL 23 2002

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HARDY COUNTY IN EASTERN WEST VIRGINIA

* UNTIL 600 PM EDT.

* AT 433 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAINFALL 6 MILES EAST OF MOOREFIELD.

SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
FLOODING IN NORTHWEST HARDY COUNTY.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE TO
HIGHER GROUND.

$$

HTS

2 follow-up statements

000 
WGUS71 KLWX 232142
FFSLWX
WVC027-031-232215-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
542 PM EDT TUE JUL 23 2002

...A FLASH FLOOD WARNING CONTINUES UNTIL 600 PM EDT FOR
  HARDY COUNTY IN EASTERN WEST VIRGINIA

...A FLASH FLOOD WARNING CONTINUES UNTIL 630 PM EDT FOR
  HAMPSHIRE COUNTY IN EASTERN WEST VIRGINIA

AT 535 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS FAR EASTERN HAMPSHIRE 
COUNTY...AND ACROSS HARDY COUNTY

RAINFALL WAS ESTIMATED TO BE 3 TO 4 INCHES IN THE NORTHWEST CORNERS 
OF BOTH HARDY AND HAMPSHIRE COUNTY.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAYS. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE
TO HIGHER GROUND.

$$

HTS

000 
WGUS71 KLWX 232220
FFSLWX
WVC031-232230-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
620 PM EDT TUE JUL 23 2002

...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR HARDY COUNTY HAS 
EXPIRED...

THE HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN
THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE
FLASH FLOODING. EVEN THOUGH STREAMS AND CREEKS WERE RECEDING...SOME
ROADWAYS MAY BE COVERED WITH WATER. MOTORISTS ARE ADVISED TO AVOID
DRIVING THROUGH FLOODED ROADWAYS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAYS. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE
TO HIGHER GROUND.

$$

LAT...LON 3899 7902 3887 7886 3903 7863 3917 7880

HTS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 5:02 PM EDT	Flash Flood Warning	LWX	Hampshire	88 min

Nearby

Flash Flood Warnings in West Virginia, 2002 Every flash flood warning in 2002

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; radar from the NEXRAD Level II archive.