Alert archive / Virginia / Flash Flood Warnings in 2002

Flash Flood Warning 25, NWS Blacksburg, VA

July 3, 2002Montgomery County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jul 3, 2002, 5:41 PM EDT for Montgomery County, Virginia. It was in force for 2 hr. 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 3, 2002, 5:41 PM EDT (21:41 UTC)
Expired
Jul 3, 2002, 7:45 PM EDT
In force
2 hr
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Montgomery County, VA

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 9.7 hours before the alert went out and 79 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, Roanoke, VA at 12:00Z on 2002-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1126 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, Roanoke, VA at 12:00Z on 2002-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939Sfc1 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
1126 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
894 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
53 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 032141
FFWRNK
VAC121-032345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
540 PM EDT WED JUL 3 2002

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MONTGOMERY COUNTY IN SOUTHWEST VIRGINIA

* UNTIL 745 PM EDT

* AT 540 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA 
OF THUNDERSTORMS OVER NORTHERN MONTGOMERY COUNTY...MOVING SOUTHWEST 
AT 15 MPH. VERY HEAVY RAIN WILL CAUSE FLASH FLOODING ALONG CREEKS 
NEAR BRUSH MOUNTAIN AND IN NORTHERN MONTGOMERY COUNTY.

* OTHER LOCATIONS THREATENED BY HEAVY RAIN INCLUDE...
  ELLISTON-LAFAYETTE...MERRIMAC...ELLISTON...PRICES FORK AND
  WALTON...

<<>>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 IN
BLACKSBURG BY CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

$$

05

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 8:04 PM EDTSevere Thunderstorm WarningRNKPittsylvania26 min
Jul 3, 1:48 PM EDTSevere Thunderstorm WarningRNKCarroll27 min
Jul 3, 2:17 PM EDTSevere Thunderstorm WarningRNKCarroll28 min
Jul 3, 2:38 PM EDTSevere Thunderstorm WarningRNKAppomattox, Campbell37 min
Jul 3, 2:47 PM EDTSevere Thunderstorm WarningRNKAmherst28 min
Jul 3, 2:55 PM EDTSevere Thunderstorm WarningRNKCarroll, City of Galax50 min
Jul 3, 2:59 PM EDTSevere Thunderstorm WarningRNKBedford31 min
Jul 3, 3:11 PM EDTSevere Thunderstorm WarningRNKPittsylvania34 min
Jul 3, 3:15 PM EDTSevere Thunderstorm WarningRNKAppomattox30 min
Jul 3, 3:17 PM EDTSevere Thunderstorm WarningRNKFranklin43 min
Jul 3, 3:18 PM EDTSevere Thunderstorm WarningRNKFranklin42 min
Jul 3, 3:34 PM EDTSevere Thunderstorm WarningRNKAlleghany, City of Covington26 min
Jul 3, 3:38 PM EDTSevere Thunderstorm WarningRNKHenry, Pittsylvania, City of Danville, City of Martinsville52 min
Jul 3, 3:44 PM EDTSevere Thunderstorm WarningRNKCarroll31 min
Jul 3, 3:45 PM EDTSevere Thunderstorm WarningRNKHenry, Pittsylvania, City of Danville, City of Martinsville45 min
Jul 3, 3:53 PM EDTSevere Thunderstorm WarningRNKBotetourt52 min
Jul 3, 4:01 PM EDTSevere Thunderstorm WarningRNKWythe29 min
Jul 3, 4:41 PM EDTSevere Thunderstorm WarningRNKFloyd34 min
Jul 3, 4:45 PM EDTSevere Thunderstorm WarningRNKCraig30 min
Jul 3, 4:57 PM EDTSevere Thunderstorm WarningRNKRoanoke, Wythe, City of Roanoke, City of Salem33 min
Jul 3, 5:04 PM EDTSevere Thunderstorm WarningRNKPatrick26 min
Jul 3, 5:07 PM EDTSevere Thunderstorm WarningRNKMontgomery38 min
Jul 3, 5:16 PM EDTSevere Thunderstorm WarningRNKCraig29 min
Jul 3, 5:22 PM EDTSevere Thunderstorm WarningRNKPulaski, City of Radford23 min
Jul 3, 5:26 PM EDTSevere Thunderstorm WarningRNKRoanoke, City of Roanoke, City of Salem34 min
Jul 3, 5:35 PM EDTSevere Thunderstorm WarningRNKTazewell25 min
Jul 3, 5:38 PM EDTSevere Thunderstorm WarningRNKGiles, Pulaski22 min
Jul 3, 5:42 PM EDTSevere Thunderstorm WarningRNKMontgomery48 min
Jul 3, 5:50 PM EDTFlash Flood WarningRNKTazewell115 min
Jul 3, 6:01 PM EDTSevere Thunderstorm WarningRNKPulaski, Tazewell29 min
Jul 3, 6:28 PM EDTFlash Flood WarningRNKGiles2 hr

Nearby

Flash Flood Warnings in Virginia, 2002Every 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.