Alert archive / Virginia / Flash Flood Warnings in 1992

Flash Flood Warning 32, NWS Blacksburg, VA

April 21, 1992Montgomery County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Apr 21, 1992, 6:44 PM EDT for Montgomery County, Virginia. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 21, 1992, 6:44 PM EDT (22:44 UTC)
Expired
Apr 21, 1992, 9:45 PM EDT
In force
3 hr
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Montgomery County, VA

The nearest sounding before it

Huntington/Tri S, WV (KHTS), launched 12:00Z, 10.7 hours before the alert went out and 228 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, Huntington/Tri S, WV at 12:00Z on 1992-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 67 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, Huntington/Tri S, WV at 12:00Z on 1992-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.1939587897Sfc1 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
67 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
1231 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KROA 212246
FFWROA
VAC067-141-161-770-023-035-045-063-077-121-640-775-220145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ROANOKE VA
644 PM EDT TUE APR 21 1992
 
THE NATIONAL WEATHER SERVICE IN ROANOKE VA HAS CONTINUED
FLASH FLOOD WARNINGS EFFECTIVE UNTIL  945 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL VIRGINIA
 
   ...FRANKLIN COUNTY...PATRICK COUNTY...ROANOKE COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...ROANOKE
 
IN SOUTHWEST VIRGINIA
 
   ...BOTETOURT COUNTY...CARROLL COUNTY...CRAIG COUNTY...FLOYD COUNTY
   ...GRAYSON COUNTY...MONTGOMERY COUNTY
 
  AND THE INDEPENDENT CITIES OF
 
   ...GALAX...SALEM
 
HEAVY RAINS HAVE CONTINUED ACROSS A WIDE SECTION OF SOUTHWEST AND WEST
CENTRAL VIRGINIA. IN THE ROANOKE AREA HEAVIEST RAINS ARE CURRENTLY
ALONG THE SOUTH SLOPES OF THE BLUE RIDGES FROM GRAYSON AND CARROLL
COUNTIES NORTHWARD THROUGH FLOYD...PATRICK FRANKLIN...ROANOKE...
BE@DFORD...BOTETOURT COUNTIES AND NORTHWARD.
 
END/MCINTOSH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 10:02 AM EDTFlash Flood WarningRNKCarroll3 hr
Apr 21, 10:49 AM EDTFlash Flood WarningRNKFranklin, Patrick4 hr
Apr 21, 1:12 PM EDTFlash Flood WarningRNKFloyd, Montgomery, Roanoke3 hr
Apr 21, 1:41 PM EDTFlash Flood WarningRNKBotetourt, Craig2 hr
Apr 21, 2:57 PM EDTFlash Flood WarningRNKFranklin, Patrick3 hr
Apr 21, 3:31 PM EDTFlash Flood WarningRNKCarroll, Grayson, Wythe3 hr
Apr 21, 3:31 PM EDTFlash Flood WarningRNKCraig, Floyd, Montgomery, Roanoke3 hr
Apr 21, 3:31 PM EDTFlash Flood WarningRNKBotetourt3 hr
Apr 21, 3:59 PM EDTFlash Flood WarningRNKFranklin, Patrick3 hr
Apr 21, 3:59 PM EDTFlash Flood WarningRNKBedford2 hr
Apr 21, 5:59 PM EDTFlash Flood WarningRNKBedford2 hr
Apr 21, 6:44 PM EDTFlash Flood WarningRNKFloyd, Franklin, Patrick, Roanoke3 hr
Apr 21, 6:44 PM EDTFlash Flood WarningRNKCarroll, Grayson3 hr
Apr 21, 6:44 PM EDTFlash Flood WarningRNKBotetourt, Craig3 hr

Nearby

Flash Flood Warnings in Virginia, 1992Every flash flood warning in 1992

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.