Alert archive / Virginia / Flash Flood Warnings in 2003

Flash Flood Warning 74, NWS Blacksburg, VA

August 28, 2003Alleghany County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Aug 28, 2003, 6:03 PM EDT for Alleghany County, Virginia. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 28, 2003, 6:03 PM EDT (22:03 UTC)
Expired: Aug 28, 2003, 9:00 PM EDT
In force: 3 hr
Issued by: NWS Blacksburg, VA
Area: Counties, with a storm outline in the text

County Alleghany County, VA

The radar

The Roanoke radar (KFCX), 99 km from the middle of the area, began a volume at 22:05 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

Roanoke, VA (KRNK), launched 12:00Z, 10.1 hours before the alert went out and 88 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: 1180 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 898 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 25 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 KRNK 282205
FFWRNK
VAC005-560-290100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
603 PM EDT THU AUG 28 2003

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ALLEGHANY COUNTY IN WEST CENTRAL VIRGINIA
  CLIFTON FORGE IN WEST CENTRAL VIRGINIA

* UNTIL 900 PM EDT

* AT 603 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED 
SHOWERS AND THUNDERSTORMS WITH HEAVY RAINS ACROSS NORTHERN ALLEGHANY
COUNTY. THESE STORMS WERE DRIFTING TO THE NORTH AT 5 MPH.

* OTHER LOCATIONS THREATENED BY HEAVY RAIN INCLUDE...HOLLINS AND
  NATURAL WELL...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

RELAY REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE IN
BLACKSBURG BY CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

LAT...LON 3795 8003 3784 7974 3781 8004 3790 8013

$$

07

1 follow-up statement

000 
WGUS71 KRNK 282347
FFSRNK
VAC005-560-290145-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
743 PM EDT THU AUG 28 2003

...THE FLASH FLOOD WARNING IS CANCELED FOR...
  CLIFTON FORGE AND ALLEGHANY COUNTY IN VIRGINIA...

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 FLOOD THREAT. EVEN THOUGH STREAMS AND CREEKS WERE RECEDING...
SOME ROADWAYS STILL MAY BE COVERED WITH WATER. MOTORISTS ARE ADVISED
TO AVOID DRIVING THROUGH FLOODED ROADWAYS.

RELAY YOUR REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

$$

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 7:15 PM EDT	Flash Flood Warning	RNK	City of Lynchburg	3 hr

Nearby

Flash Flood Warnings in Virginia, 2003 Every flash flood warning in 2003

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.