Alert archive / Virginia / Flash Flood Warnings in 1987
Flash Flood Warning 17, NWS Blacksburg, VA
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.
- 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
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.