Alert archive / Virginia / Flash Flood Warnings in 1987

Flash Flood Warning 17, NWS Blacksburg, VA

June 21, 1987Patrick County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jun 21, 1987, 10:40 PM EDT for Patrick County, Virginia. It was in force for 80 min.

The area

The counties it named.

The facts

Issued
Jun 21, 1987, 10:40 PM EDT (02:40 UTC)
Expired
Jun 22, 1987, 12:00 AM EDT
In force
80 min
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 00:00Z, 2.7 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 00:00Z on 1987-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2627 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1987-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.193958Sfc1 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
2627 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1097 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRIC 220240
FFWROA
VAC141-220400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ROANOKE VA
ISSUED BY RICHMOND VA
1040 PM EDT SUN JUN 21 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1200 AM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

VIRGINIA...SOUTH CENTRAL PATRICK

FLOODING HAS BEEN REPORTED OR IS IMMINENT. TAKE IMMEDIATE
PRECAUTIONS AGAINST RAPIDLY RISING WATERS AND BE PREPARED
TO MOVE TO SAFETY.

ERT FOR FAST RISING WATER.

THER STATEMENTS OR WARNINGS WILL BE ISSUED WHEN THERE ARE
ORTANT CHANGES IN THE FLOODING CONDITIONS.

ELER

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 21, 6:43 PM EDT, 3 hours 57 minutes before
^WBCSPSROA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROANOKE VA
625 PM   EDT  SUN JUN 21 1987

A CLUSTER OF THUNDERSTORM CELLS IN CENTRAL AND SOUTHERN PATRICK COUNTY
VIRGINIA DURING THE PAST 2 HOURS HAVE PRODUCED 1.27 IN OF RAIN DURING
THIS TIME. WHILE THIS IS A WELCOME RELIEF IN GENERAL TO THE COUNTYS
RINFALL..THE SLOWNESS OF MOVEMENT OF THESE CELL WILL MAKE IT NECESSARY
TO CONTINUE TO MONITOR THIS AREA. THESE HEAVY THUNDERSTORMS ARE CAPABLW OF
HEAVY DOWNPOURS DANGEREOUS LIGHTNING ALONG WITH THE POSSIBILITY OF LOCAL
SMALL STREAM AND URBAN FLOODING.

OTHER VERY HEAVY THUNDERSTORMS CONTINUE IN EXTREME SOUTHWEST VIRGINIA
WHERE AN INFLUX OF MOISTURE AND DIRUNAL HEATING AND SET OFF THESE
HEAVY THUNDERSTORMS.
A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT OVER THE SOUTHERN WEST
VIRGINIA COUNTIES OF LOGAN AND MINGO UNTIL 7 PM THIS EVENING.
OTHER STATEMENT WILL BE ISSUED CONCERNING THESE CELL AS NECESSARY.
$$WB
Special weather statement, Jun 21, 8:06 PM EDT, 2 hours 34 minutes before
^WBCSPSROA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROANOKE VA
745T PM  EDT  SUN JUN 21 1987

...A VERY HEAVY THUNDERSTORM HAS DEVELOPED IN PATRICK COUNTY VA...

AT 735 PM RADAR DETECTED A VERY HEAVY THUNDERSTORM JUST TO THE NORTHWEST
OF STUART VIRGINIA WITH A SLIGHT SOUTHEASTERLY DRIFT.  THIS VERY HEAVY
THUNDERSTORM IS ONE OF SEVERAL CELLS THAT HAVE DEVELOPED IN THE CENTRAL
AND SOUTHERN PORTION OF PATRICK COSUNTY VA. RAINFALL TOTAL DURING THE
PAST 3 HOURS HAS REACHED 2.65 IN AT THE SLATE MOUNTAIN GAGE WHILE OTHER
GAGES HAVE IN EXCESS OF AN INCH.

THIS VERY HEAVY THUNDERSTORM IS CAPABLE OF VERY HEAVY DOWNPOURS STRONG
GUSTY WINDS DANGEREOUS LIGHTNING AND LOCAL SMALL STREAM AND URBAN
FLOODING. THE RAINFALL RATE AT THIS TIME SEEMS TO BE AROUND 11/2 IN.PER
HOUR WITH CONVECTIVE THUNDERSTORMS EXPECTED DURING THE NEXT 2 HOURS.
TAKE INDOOR SHELTER AND BE ALERT FOR THE POSSIBILITY OF SMALL STREAM
FLOODING DURING THE PASSAGE OF THESE STORMS DURING THE NEXT 2HRS.$$WB
Special weather statement, Jun 21, 9:32 PM EDT, 1 hour 8 minutes before
^WBCSPSROA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROANOKE VA
915 PM   EDT  SUN JUN 21 1987

...VERY HEAVY THUNDERSTORMS IN CARROLL PATRICK AND FLOYD COUNTIES OF
   VIRGINIA...
AT 910 PM EDT WEATHER RADAR DETECTED VERY HEAVY THUNDERSTORMS IN EASTERN
CARROLL NORTHCENTRAL PATRICK AND SOUTHCENTRAL FLOYD COUNTIES IN VIRGINIA
WITH MOVEMENT TO THE SOUTHEAST AROUND 10 TO 15 MPH BUT NEARLY STATIONRY
AT TIMES.
THESE STORMS ARE CAPABLE OF HEAVY DOWNPOURS DANGEREOUS LIGHTNING STRONG
GUSTY WINDS AND SMALL STREAM AND URBAN FLOODING DURING THE NEXT FEW HOURS.
RAINFALL AMOUNT AS OF 915 PM.. 2.38 AT BUSTED ROCK 1..1.66 BUSTED ROCK 2
3.42 PATRICK CENTRL ACADEMY..2.60 TROT VALLEY. THESE HEAVY RAINFALLS IS
CONNETED WITH THE OUTFLOW BOUNDRIES FROM WEST VIRGINIA AND NORTH CAROLINA
AND COSVER THE COUNTIES OF CARROLL PATRICK HENRY AND FLOYD AT THIS TIME
WITH CLOUDINESS BECOMING ENHENSED OVER PULASKI COUNTY VA.
...HAIL WAS INDICATED IN THE THUNDE	RSTORM IN SOUTHCENTRAL FLOYD AT 930 PM.
TAKE NECESSARY PRECAUTIONS TO PROTECT LIFE AND PROPERTY IN THESE COUNTIES$$WB

Nearby

Flash Flood Warnings in Virginia, 1987Every flash flood warning in 1987

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.