Alert archive / North Carolina / Flash Flood Warnings in 1987

Flash Flood Warning 6, NWS Blacksburg, VA

April 15, 1987Caswell County, Rockingham County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Apr 15, 1987, 10:56 PM EDT for Caswell County, Rockingham County, North Carolina. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Apr 15, 1987, 10:56 PM EDT (02:56 UTC)
Expired
Apr 16, 1987, 3:00 AM EDT
In force
4 hr
Issued by
NWS Blacksburg, VA
Area
Whole counties

Counties Caswell County, NC, Rockingham County, NC

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, 2.9 hours before the alert went out and 47 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 1987-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1987-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
213 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGSO 160256
FFWGSO
NCC033-157-160700-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENSBORO NC
1056 PM EDT WED APR 15 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 300 AM EDT FOR THE FOLLOWING COUNTIES OF
 
NORTH CAROLINA... CASWELL... ROCKINGHAM
 
AT 1057 PM RADAR INDICATED EXTREMELY HEAVY RAINFALL IN CASWELL AND
ROCKINGHAM COUNTIES. STREAMS AND CREEKS ARE RUNNING VERY HIGH. ALSO..
MANY ROADWAYS ARE BEGINNING TO INUNDATE WITH WATER. HEAVY SHOWERS AND
THUNDERSTORMS CONTINUE IN GUILFORD AND RANDOLPH COUNTIES AND THESE
STORMS WILL LIKELY DRIFT TO THE NORTHEAST PRODUCING RAPID AND LARGE
AMOUNTS OF RUNOFF IN BOTH CASWELL AND ROCKINGHAM COUNTIES.
 
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT
OR HAS BEEN REPORTED. PEOPLE IN THE WARNING AREA SHOULD TAKE
IMMEDIATE ACTION TO PROTECT LIVES AND PROPERTY FROM RAPIDLY
RISING AND SWIFTLY MOVING WATER.
 
RESIDENTS LIVING NEAR STREAMS..CREEKS OR AREAS PRONE TO FLOODING DUE TO
FAST RISING WATER SHOULD BE ESPECIALLY ALERT AND WATCHFUL.
 
MOTORISTS SHOULD BE PARTICULARLY CAUTIOUS AND NOT ATTEMPT TO CROSS
ANY ROADWAY..BRIDGE OR LOW LYING AREA INUNDATED WITH SWIFTLY MOVING WATER.
PEDESTRIANS AS WELL SHOULD NOT ATTEMPT TO CROSS ANY AREA CONTAINING
RAPIDLY MOVING WATER ESPECIALLY IF THE WATER DEPTH IS ABOVE KNEE LEVEL.
 
RJK

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, Apr 15, 8:34 PM EDT, 2 hours 22 minutes before
^WBCSPSROA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROANOKE VA
830  PM  EDT  WED APR 15 1987

AT 820 PM RADAR SHOWED THAT THUNDERSTORMS WERE OCCURRING OVER
CENTRAL THROUGH EASTERN PATRICK..WESTERN HENRY..WESTERN FRANKLIN
AND SOUTHERN FLOYD COUNTIES. HEAVIEST RAINS APPEARED TO BE CENTERED
FROM A FEW MILES NORTH OF STUART OVER TO CRITZ IN PATRICK COUNTY..
WHERE SOME AMOUNTS AROUND AN INCH IN TWO HOURS HAVE BEEN MEASURED.

A SMALL STREAM FLOOD WATCH CONTINUES IN THESE COUNTIES. PERSONS
LIVING NEAR FLOOD PRONE AREAS SHOULD BE ESPECIALLY ALERT SINCE
THE RAINFALL ACTIVITY SHOWS ONLY SLOW MOVEMENT AND CONTINUED RAINS
THE NEXT FEW HOURS IS POSSIBLE.

STAY TUNED TO MEDIA AND NOAA WEATHER RADIO SOURCES IN THE EVENT A
WARNING OF IMMINENT OR ACTUAL FLOODING IS REQUIRED.

MCINTOSH
Special weather statement, Apr 15, 8:43 PM EDT, 2 hours 13 minutes before
^WBCSPSROA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROANOKE VA
830  PM  EDT  WED APR 15 1987

AT 820 PM RADAR SHOWED THAT THUNDERSTORMS WERE OCCURRING OVER
CENTRAL THROUGH EASTERN PATRICK..WESTERN HENRY..WESTERN FRANKLIN
AND SOUTHERN FLOYD COUNTIES. HEAVIEST RAINS APPEARED TO BE CENTERED
FROM A FEW MILES NORTH OF STUART OVER TO CRITZ IN PATRICK COUNTY..
WHERE SOME AMOUNTS AROUND AN INCH IN TWO HOURS HAVE BEEN MEASURED.

A SMALL STREAM FLOOD WATCH CONTINUES IN THESE COUNTIES. PERSONS
LIVING NEAR FLOOD PRONE AREAS SHOULD BE ESPECIALLY ALERT SINCE
THE RAINFALL ACTIVITY SHOWS ONLY SLOW MOVEMENT AND CONTINUED RAINS
THE NEXT FEW HOURS IS POSSIBLE.

STAY TUNED TO MEDIA AND NOAA WEATHER RADIO SOURCES IN THE EVENT A
WARNING OF IMMINENT OR ACTUAL FLOODING IS REQUIRED.

MCINTOSH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 8:25 PM EDTSevere Thunderstorm WarningRNKDavidson65 min
Apr 15, 9:37 PM EDTFlash Flood WarningRNKRandolph3 hr
Apr 15, 10:13 PM EDTFlash Flood WarningRNKDavidson, Guilford3 hr
Apr 16, 1:24 AM EDTFlash Flood WarningRNKDavidson, Guilford96 min

Nearby

Flash Flood Warnings in North Carolina, 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.