Alert archive / Virginia / Flash Flood Warnings in 1987

Flash Flood Warning 9, NWS Blacksburg, VA

April 16, 1987Craig County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Apr 16, 1987, 12:54 PM EDT for Craig County, Virginia. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 16, 1987, 12:54 PM EDT (16:54 UTC)
Expired
Apr 16, 1987, 4:00 PM EDT
In force
3 hr
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Craig 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, 4.9 hours before the alert went out and 158 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 1987-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 59 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 1987-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
59 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
594 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
75 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 KRIC 161654
FFWROA
VAC045-162000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ROANOKE VA
ISSUED BY RICHMOND VA
1254 PM EDT THU APR 16 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 400 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

VIRGINIA...CRAIG

SMALL STREAM FLOODING IS OCCURRING IN THE COUNTY AT THIS TIME.
RADAR SHOWS CONTINUED PRECIPITATION OVER THE AREA...AND FLOODING
WILL PERSIST THROUGH THE AFTERNOON.

REMEMBER...A SMALL STREAM FLOOD WARNING MEANS THAT FLOODING OF
SMALL STREAMS HAS BEEN REPORTED OR IS IMMINENT. ALL RESIDENTS
IN THE FLOODING AREA SHOULD TAKE NECESSARY PRECAUTIONS TO E,NSURE
THEIR SAFETY NOW. BE PREPARED TO MOVE TO HIGH GROUND IF FLOOD
WATERS THREATEN.

REPORT ALL SEVERE WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY
FOR RELAY TO THE NATIONAL WEATHER SERVICE.

  GILLEN

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 9:25 PM EDTFlash Flood WarningRNKPatrick5 hr
Apr 15, 11:00 PM EDTFlash Flood WarningRNKBedford, Pittsylvania3 hr

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.