Alert archive / Maryland / Flash Flood Warnings in 1993

Flash Flood Warning 19, NWS Charleston, WV

March 4, 1993Allegany County, Maryland

NWS Charleston, WV issued this flash flood warning at Mar 4, 1993, 11:02 AM EST for Allegany County, Maryland. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Mar 4, 1993, 11:02 AM EST (16:02 UTC)
Expired
Mar 4, 1993, 2:00 PM EST
In force
3 hr
Issued by
NWS Charleston, WV
Area
Whole counties

County Allegany County, MD

The radar

The Sterling radar (KLWX), 127 km from the middle of the area, began a volume at 16:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 4.0 hours before the alert went out and 148 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, Pittsburgh, PA at 12:00Z on 1993-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Pittsburgh, PA at 12:00Z on 1993-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 square meters per square second.1939587897Sfc1 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
592 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
238 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 KEKN 041602
FFWEKN
MDC001-WVC023-027-031-057-071-041900-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE ELKINS WV
1102 AM EST THU MAR 4 1993
 
THE NATIONAL WEATHER SERVICE IN ELKINS HAS ISSUED AND EXTENDED A
FLOOD WARNING FOR SMALL STREAMS AND CREEKS EFFECTIVE UNTIL  200 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST MARYLAND
 
   ...ALLEGANY COUNTY
 
 
IN EAST WEST VIRGINIA
 
   ...GRANT COUNTY...HAMPSHIRE COUNTY...HARDY COUNTY
   ...MINERAL COUNTY...PENDLETON COUNTY
 
A FLOOD WARNING FOR SMALL STREAMS AND CREEKS HAS BEEN ISSUED FOR
ALLEGANY COUNTY OF WESTERN MARYLAND. THE FLOOD WARNING FOR SMALL STREAMS
AND CREEKS HAS BEEN EXTENDED FOR GRANT...HAMPSHIRE...HARDY...MINERAL AND
PENDLETON COUNTIES OF THE POTOMAC HIGHLANDS OF WEST VIRGINIA.
 
WEATHER RADAR CONTINUES TO SHOW RAIN OVER THE WARNED COUNTIES. STREAMS
ARE RUNNING HIGH WITH SOME OVERFLOW PROBLEMS BEING REPORTED. NUMEROUS
POOR DRAINAGE AND BASEMENT FLOODING PROBLEMS HAVE BEEN REPORTED.
 
WITH THE ADDITIONAL RAINFALL..STREAMS WILL CONTINUE TO RISE. FLOODING TO
LOW LYING AND POOR DRAINAGE AREAS WILL CONTINUE.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  TH
E WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
 
 
END
 
GILKERSON
 
NNNN

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, Mar 4, 8:54 AM EST, 2 hours 8 minutes before
WVZ003-KYZ006-009-OHZ008-009-041500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTINGTON WV
850 AM EST THU MAR 04 1993

...RAINS CAUSING MINOR FLOODING ACROSS THE OHIO VALLEY.....

RAINFALL AMOUNTS OVERNIGHT RANGED FROM ABOUT ONE QUARTER OF AN INCH
TO AROUND ONE AND ONE QUARTER OF AN INCH.  THIS WAS PRODUCING MINOR
FLOODING OF LOW LYING AREAS, LARGE PUDDLES ON ROADS AND HIGH RUNNING
STREAMS AND CREEKS.

AT 850 AM MOSTLY LIGHT RAIN CONTINUED TO FALL ACROSS ALL OF THE OHIO VALLEY.
THE HEAVIEST RAIN AROUND THE TRI-STATE AREA WAS FALLING OVER NORTHERN
MASON COUNTY OF WEST VIRGINIA AND GALLIA AND MEIGS COUNTIES OF OHIO.

RAIN, MODERATE AT TIMES, WILL CONTINUE TO FALL THROUGHOUT THE DAY.  MINOR
FLOODING WILL CONTINUE, BUT NO MAJOR FLOODING IS EXPECTED AT THIS TIME.

WHEN OUT AND ABOUT TODAY, SLOW DOWN IF YOU ARE DRIVING AND BE CAREFUL OF
WATER OVER THE ROAD.  REMEMBER, HIGH RUNNING CREEKS AND STREAMS CAN BE
VERY DANGEROUS, SO lTRY TO AVOID THESE AT ALL TIMES.

END/COSTELLO
Special weather statement, Mar 4, 9:48 AM EST, 1 hour 14 minutes before
WVZ003-KYZ006-009-OHZ008-009-041600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTINGTON WV
945 AM EST THU MAR 04 1993

...FLASH FLOOD WATCH FOR WESTERN WEST VIRGINIA UNTIL NOON...

RAINFALL ACROSS THE AREA OVERNIGHT HAS PRODUCED MINOR FLOODING OF
LOW LYING AREAS, HIGH RUNNING STREAMS AND CREEKS, AND PONDING OF
WATER ON ROADWAYS.

AT 945 PM A BAND OF MODERATE TO HEAVY RAIN EXTENDED FROM EASTERN LAWRENCE
COUNTY OF OHIO SOUTHWARD THROUGH CENTRAL CABELL INTO EASTERN WAYNE AND
WESTERN LINCOLN COUNTIES OF WEST VIRGINIA.  MOVEMENT WAS TO THE NORTHEAST
AT ABOUT 15 MPH.

WITH SMALL STREAMS AND CREEKS ALREADY RUNNING HIGH, ANY QUICK HEAVY
ADDITIONAL AMOUNT OF RAINFALL COULD PRODUCE FLASH FLOODING.

PERSONS, ESPECIALLY THOSE LIVING IN OR NEAR LOW LYING AREAS, SMALL STREAMS
AND CREEKS SHOULD BE ON THE ALERT FOR ANY POSSIBLE RAPID RISE IN WATER.

IF FLOODING IS OBSERVED, SEEK SHELTER TO HIGHER GROUNDS.  AVOID HIGH
RUNNING STREAMS AND CREEKS AT ALL TIMES.

END/COSTELLO

Nearby

Flash Flood Warnings in Maryland, 1993Every flash flood warning in 1993

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; radar from the NEXRAD Level II archive.