Alert archive / Mississippi / Flash Flood Warnings in 1991

Flash Flood Warning 6, NWS Mobile, AL

May 10, 1991George County, Mississippi

NWS Mobile, AL issued this flash flood warning at May 10, 1991, 3:04 PM CDT for George County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
May 10, 1991, 3:04 PM CDT (20:04 UTC)
Expired
May 10, 1991, 6:00 PM CDT
In force
3 hr
Issued by
NWS Mobile, AL
Area
Whole counties

County George County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.1 hours before the alert went out and 122 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, Slidell Radar S, LA at 12:00Z on 1991-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 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, Slidell Radar S, LA at 12:00Z on 1991-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
38 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
841 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
220 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 102004
FFWMOB
MSC039-102300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
304 PM CDT FRI MAY 10 1991
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  600 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST MISSISSIPPI
 
   ...GEORGE COUNTY
 
GEORGE COUNTY MISSISSIPPI CIVIL DEFENSE OFFICE REPORTED RAINFALL IN
EXCESS OF FOUR INCHES HAS FALLEN IN AND AROUND LUCEDALE MISSISSIPPI
SINCE NOON CDT CAUSING STREET AND FLOOD PRONE AREAS TO FLOOD. HIGHWAY
98 AND ROAD 163 HAS BEEN CLOSED IN THE PAST HOUR IN GEORGE COUNTY...
AS WELL AS SOME BACK ROADS IN THE COUNTY.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER M4OVE UP TO HIGHER GROUND.

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, May 10, 2:30 PM CDT, 34 minutes before
ALZ013-016-015-MSZ013-014-102130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
230 PM CDT FRI MAY 10 1991

...ONCE AGAIN HEAVY RAINFALL COVERING PARTS OF SOUTHEAST MISSISSIPPI
AND SOUTHWEST ALABAMA...

AT 225 PM CDT MOBILE RADAR SHOWED A LARGE AREA OF SHOWERS WITH SCATTERED
STRONG THUNDERSTORMS OVER EXTREME SOUTHEAST MISSISSIPPI AND SOUTHWEST
ALABAMA.  THE STRONGEST STORMS WERE FROM SOUTHEAST OF WIGGINS MISSISSIPPI
TO SOUTHEAST OF CITRONELLE ALABAMA.  THE STORMS WERE TRACKING EAST AT
20 MPH.

RESIDENTS IN OR NEAR THE STRONGER STORMS CAN EXPECT HEAVY RAINFALL...
CAUSING STREET AND FLOOD PRONE AREAS TO FLOOD BRIEFLY AS THESE STORMS
MOVE SLOWLY EAST ACROSS THE AREA FOR THE NE	XT COUPLE HOURS.

Nearby

Flash Flood Warnings in Mississippi, 1991Every flash flood warning in 1991

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.