Alert archive / North Carolina / Flash Flood Warnings in 1992

Flash Flood Warning 55, NWS Blacksburg, VA

November 22, 1992Alleghany County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Nov 22, 1992, 9:26 PM EST for Alleghany County, North Carolina. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Nov 22, 1992, 9:26 PM EST (02:26 UTC)
Expired: Nov 23, 1992, 12:30 AM EST
In force: 3 hr
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Alleghany County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.4 hours before the alert went out and 119 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 576 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 274 m²/s²
0-3 km storm-relative helicity: 354 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGSO 230226
FFWGSO
NCC005-230530-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE GREENSBORO NC
926 PM EST SUN NOV 22 1992

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1230 AM EST FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE STATE OF NORTH CAROLINA
      ALLEGHANY

AT 920 PM THE ALLEGHANY COUNTY SHERIFF DEPARTMENT REPORTED
NUMEROUD LOW WATER BRIDGES WERE UNDER WATER AND SEVERAL MUDSLIDES
HAD ALSO OCCURRED.  THE SOAKED TERRAIN ALSO CONTRIBUTED TO
SEVERAL TREES TOPPLING OVER.  MUCH OF THIS HAS OCCURRED IN THE
PINEY CREEK AND LAUREL SPRINGS AREAS IN THE WESTERN PART OF THE
COUNTY.

A FLASH FLOOD WARNING MEANS FLOODING IS OCCURRING OR IS IMMINENT.
PEOPLE IN THE WARNED AREA SHOULD TAKE IMMEDIATE ACTION TO PROTECT
LIFE AND PROPERTY.

NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
ESCAPE RISING WATER BY MOVING TO HIGHER GROUND.

 SHOWERS AND THUNDERSTORMS WITH HEAVY RAINS WILL CONTINUE TO MOVE
 ACROSS ALLEGHANY COUNTY FOR THE NEXT HOUR OR TWO.  THE SHOWERS AND
 THUNDERSTORMS ARE MOVING NORTHEAST AT AROUND 50 MPH.

 IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO AP SAFE PLACE
 IMMEDIATELY.  WHEN IT IS SAFE..ASK YOUR NEAREST LAW ENFORCEMENT
 AGENCY TO RELAY YOUR SEVERE WEATHER REPORT TO THE LOCAL NATIONAL
 WEATHER SERVICE OFFICE.

 RBN

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, Nov 22, 5:49 PM EST, 3 hours 37 minutes before

VAZ008-009-013>016-230100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROANOKE VIRGINIA
645 PM EST SUN NOV 22 1992

...HEAVY DOWNPOURS AND SCATTERD THUNDERSTORMS OVER SOUTHWEST VIRGINIA...

AT 640 PM RADAR SHOWS SCATTERED THUNDERSTORMS IN PULASKI MONTGOMERY
AND CRAIG COUNTIES IN VIRGINIA. THESE THUNDERSTORMS ARE MOVING TO THE
NORTHEAST. ALSO AUTOMATIC RAIN GAUGES SHOW SOME HEAVY DOWNPOURS.

THESE THUNDERSTORMS AND OTHERS THAT DEVELOP COULD CAUSE STORNG GUSTY
WINDS AND DANGEROUS LIGHTNING. HEAVY DOWNPOURS COULD CAUSE SOME LOW
AREA FLOODING AND SMALL STREAM FLOODING. ANYONE IN THESE AREAS SHOULD
BE ON THE LOOKOUT IN CASE SOME FLOODING OCCURS.
END/CE

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 22, 10:50 PM EST	Severe Thunderstorm Warning	RNK	Iredell	25 min
Nov 22, 11:14 PM EST	Tornado Warning	RNK	Davie, Rowan	31 min
Nov 22, 11:30 PM EST	Severe Thunderstorm Warning	RNK	Forsyth, Yadkin	45 min
Nov 22, 11:43 PM EST	Tornado Warning	RNK	Davidson	32 min
Nov 23, 12:04 AM EST	Severe Thunderstorm Warning	RNK	Guilford, Rockingham, Stokes	56 min
Nov 23, 12:37 AM EST	Severe Thunderstorm Warning	RNK	Caswell	68 min
Nov 23, 12:51 AM EST	Tornado Warning	RNK	Davidson, Rowan	54 min
Nov 23, 1:25 AM EST	Severe Thunderstorm Warning	RNK	Alamance	35 min
Nov 23, 1:58 AM EST	Severe Thunderstorm Warning	RNK	Alamance, Caswell	47 min

Nearby

Flash Flood Warnings in North Carolina, 1992 Every flash flood warning in 1992

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.