Alert archive / Virginia / Flash Flood Warnings in 1990
Flash Flood Warning 4, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flash flood warning at May 22, 1990, 12:26 AM EDT for Roanoke County, Virginia. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- May 22, 1990, 12:26 AM EDT (04:26 UTC)
- Expired
- May 22, 1990, 1:30 AM EDT
- In force
- 64 min
- Issued by
- NWS Blacksburg, VA
- Area
- Whole counties
County Roanoke 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, 4.4 hours before the alert went out and 126 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KROA 220427 RRA
FFWROA
VAC770-161-220530-
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE ROANOKE VA
1226 AM EDT TUE MAY 22 1990
THE NATIONAL WEATHER SERVICE IN ROANOKE HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL 130 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHWEST VIRGINIA
...CTY OF ROANOKE...ROANOKE
AT 1230 AM EDT...WEATHER RADAR INDICATES SCATTERED THUNDERSTORMS
ACROSS THE SOUTHERN SHENANDOAH AND ROANOKE VALLEYS AND EXTENDING
ACROSS THE BLUE RIDGE INTO WESTERN BEDFORD COUNTY. THESE THUNDERTORMS
HAVE CONTAINED VERY HEAVY DOWNPOURS IN A SHORT PERIOD OF TIME. ROANOKE
REGIONAL AIRPORT HAS MEASURED NEAR 1.50 INCHES OF RAIN SINCE AROUND
1100 PM MONDAY EVENING. THE THUNDERSTORMS ARE MOVING EASTWARD AT 30
MPH.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS
OBSERVED...A&CT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
END/DOCWhat 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, May 22, 12:00 AM EDT, 26 minutes before
VAZ008-009-014-220500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROANOKE VA 1200 AM EDT TUE MAY 22 1990 ...THUNDERSTORMS WITH VERY HEAVY RAIN OVER ROANOKE VALLEY AREA... AT 1155 PM RADAR SHOWED A CLUSTER OF THUNDERSTORMS WITH VERY HEAVY RAIN OVER BOTETOURT COUNTY...THE CITY OF ROANOKE AND EASTERN ROANOKE COUNTY.. AND ALSO EASTERN FRANKLIN COUNTY. THESE STORMS ARE DUMPING UP TO 1 INCH OF RAIN IN SOME AREAS IN LESS THAN AN HOURS TIME. THIS COULD CAUSE SOME FLOODING IN LOW LYING AREAS...ESPECIALLY URBAN AREAS. THESE STORMS WILL BE MOVING INTO BEDFORD COUNTY WITHIN THE HOUR. MOTORISTS ARE ADVISED TO SLOW DOWN AND DRIVE WITH EXTREME CAUTION IN THE VERY HEAVY RAIN. END/JJ $
Nearby
Flash Flood Warnings in Virginia, 1990Every flash flood warning in 1990
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.