Alert archive / Virginia / Flash Flood Warnings in 1989

Flash Flood Warning 9, NWS Blacksburg, VA

June 21, 1989Patrick County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jun 21, 1989, 7:11 PM EDT for Patrick County, Virginia. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jun 21, 1989, 7:11 PM EDT (23:11 UTC)
Expired
Jun 21, 1989, 9:15 PM EDT
In force
2 hr
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Patrick County, VA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.2 hours before the alert went out and 75 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, Greensboro/Hi Pt, NC at 12:00Z on 1989-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 432 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, Greensboro/Hi Pt, NC at 12:00Z on 1989-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
432 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
588 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KROA 212313
FFWROA
VAC141-220115-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ROANOKE VA
711 PM EDT WED JUN 21 1989
 
THE NATIONAL WEATHER SERVICE IN ROANOKE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  915 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHWEST VIRGINIA
          ...PATRICK
 
AT 707 PM WEATHER RADAR SHOWED A SERIES OF THUNDERSTORMS MOVING OUT OF
NORTH CAROLINA INTO THE SOUTHWEST SECTIONS OF PATRICK AND THEN MOVING
NORTHEAST ALONG THE BLUE RIDGE MOUNTAINS TOWARD FRANKLIN COUNTY.
ONE INCH AMOUNTS OF RAIN PER HOUR ARE FALLING IN SOME SECTIONS.  SMALL
STREAMS SHOULD BEGIN RISING RAPIDLY SOON.
 
PERSONS IN PATRICK ALONG THESE STREAMS SHOULD BEGIN TAKING IMMEDIATE
ACTION AND BE PREPARED FOR RISING WATER.  AT THIS TIME THE MAYO RIVER
IN STUART IS NOT AN IMMEDIATE THREAT...BUT RESPONSIBLE OFFICIALS IN
PATRICK SHOULD BEGIN TO MONITOR RISES ALONG THE MAYO RIVER
IMMEDIATELY.
 
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
ON>E...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

Nearby

Flash Flood Warnings in Virginia, 1989Every flash flood warning in 1989

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.