Alert archive / Mississippi / Flash Flood Warnings in 1991

Flash Flood Warning 9, NWS Jackson, MS

February 19, 1991Issaquena County, Mississippi

NWS Jackson, MS issued this flash flood warning at Feb 19, 1991, 6:56 AM CST for Issaquena County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Feb 19, 1991, 6:56 AM CST (12:56 UTC)
Expired
Feb 19, 1991, 10:00 AM CST
In force
3 hr
Issued by
NWS Jackson, MS
Area
Whole counties

County Issaquena County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 0.9 hours before the alert went out and 97 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, Jackson, MS at 12:00Z on 1991-02-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 211 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, Jackson, MS at 12:00Z on 1991-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.1939587897117Sfc1 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
211 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
663 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
132 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 KJAN 191307
FFWJAN
MSC097-013-053-055-125-191600-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
656 AM CST TUE FEB 19 1991
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1000 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MISSISSIPPI
 
   ...MONTGOMERY COUNTY
 
IN NORTH CENTRAL MISSISSIPPI
 
   ...CALHOUN COUNTY
 
IN WEST CENTRAL MISSISSIPPI
 
   ...HUMPHREYS COUNTY...ISSAQUENA COUNTY...SHARKEY COUNTY
 
AT 700 AM CST WEATHER SERVICE RADAR INDICATED THUNDERSTORMS WITH HEAVY
RAIN AROSS WEST CENTRAL MISSISSIPPI. SINCE THE GROUND IS ALREADY
SATURATED...FLASH FLOODING WILL LIKELY OCCUR.
 
IN ADDITION...THE CALHOUN COUNTY SHERIFF REPORTED MANY COUNTY ROADS
UNDER WATER AND EVACUATIONS MAY HAVE TO BE DONE LATER THIS MORNING.
 
 
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT
TO CROSS BRIDGES OR LOW SPOTS IF WATER COVERS THE ROAD.6  NEVER
TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
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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, Feb 19, 3:51 AM CST, 3 hours 5 minutes before
MSZ002-002

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
345 AM CST TUE FEB 19 1991

AT 345AM...THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE INDICATED OVER
WEST CENTRAL MISSISSIPPI EXTENDING INTO SOUTHEAST ARKANSAS. THE
STRONGEST THUNDERSTORMS WERE LOCATED IN THE VICINITY OF GREEVILLE AND
GREENWOOD.

A LARGE BAND OF MOSTLY LIGHT RAIN AND OTHER THUNDERSTORMS WERE OVER
MOST OF NORHTWEST MISSISSIPPI.

FLASH FLOOD WARNINGS ARE NOW BEING ISSUSED FOR SOME DELTA COUNTIES.

ALONG WITH THE HEAVY RAIN...GUSTY WINDS AND LIGHTNING WILL LIKELY
DEVELOP WITH THESE THUNDERSTORMS.  BY LATER THIS MORNING THERE WILL
BE A THREAT FOR SEVERE THUNDERSTORMS SO RESIDENTS SHOULD REMAIN ALERT
FOR CHANGING CONDITIONS.

ALSO A TORNADO WATCH HAS BEEN ISSUED FOR BOLIVAR...WASHINGTON...
ISSAQUENA..JEFFERSON...WARREN...ADAMS...FRANKLIN...AND WILKINSON
COUNTIES UNTIL 10 AM.
Special weather statement, Feb 19, 6:04 AM CST, 52 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-191800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
600 AM CST TUE FEB 19 1991

...TORNADO WATCH #13 REMAINS IN EFFECT UNTIL 1000 AM THIS MORNING FOR A
SMALL PORTION OF WEST AND SOUTHWEST MISSISSIPPI...

AT 555 AM CST...A BAND OF MODERATE RAIN ALONG WITH SCATTERED EMBEDDED
THUNDERSTORMS...SOME OF WHICH WERE PRODUCING VERY HEAVY RAINFALL
CONTINUED TO MOVE ACROSS THE DELTA AND INTO NORTHEAST MISSISSIPPI. THIS
BAND OF RAIN WAS PART OF THE LEADING EDGE OF PRECIPITATION ASSOCIATED
WITH AN APPROACHING COLD FRONT. THIS COLD FRONT WILL MOVE SOUTHEAST INTO
A INCREASINGLY UNSTABLE AIR MASS DURING THE DAY TODAY. THE HEAVIER RAINS
AND THUNDERSTORMS WILL MOVE INTO CENTRAL AND SOUTH PORTIONS OF
MISSISSIPPI LATER THIS MORNING AND INTO THE EVENING.

ALONG WITH HEAVY RAINFALL AMOUNTS...THESE THUNDERSTORMS WILL LIKELY
PRODUCE GUSTY SURFACE WINDS...FREQUENT LIGHTNING...AND POSSIBLY SMALL
HAIL AS THEY MOVE THROUGH THE AREA. THE THREAT FOR SEVERE THUNDERSTORMS
WILL CONTINUE FOR THE ENTIRE STATE THROUGH THE DAY TODAY AND INTO
TONIGHT.

THE COLD FRONT IS EXPECTED TO PUSH INTO THE NORTHWEST CORNER OF THE
STATE THIS MORNING AND BE THROUGH TO THE MISSISSIPPI COAST BY WEDNESDAY
AFTERNOON. AS THE FRONT PASSES THROUGH THE THREAT OF HEAVY RAINFALL AND
SEVERE WEATHER WILL DIMINISH. COOLER AND DRIER AIR WILL FILTER INTO THE
STATE BEHIND THE FRONT. HOWEVER..THE CHAoNCE FOR SOME LIGHT RAIN WILL
CONTINUE INTO THURSDAY.
Special weather statement, Feb 19, 6:41 AM CST, 15 minutes before
MSZ003-008-002-191335-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
640 AM CST TUE FEB 19 1991

...STRONG THUDERSTORMS MOVING INTO WEST CENTRAL MISSISSIPPI...

AT 640 AM CST WEATHER SERVICE RADAR INDICATED STRONG THUNDERSTORMS
MOVING INTO WEST CENTRAL MISSISSIPPI. THE STORMS WILL AFFECT THE
VICKSBURG AREA BEFORE 7 AM. THE STORMS WILL PRODUCE HEAVY RAIN AND
STRONG GUSTY WINDS. THE STORMS WERE MOVING TO THE EAST NORTHEAST AT
45 MPH.

THE STORMS WILL SLO AFFECT PART SO ISSAQUENA...SHARKEY AND WASHINGTON
COUNTIES BEFORE 730 AM CST.

REMEMBER A TORNADO WATCH IS IN EFFECT TIL 10 AM CST FOR A SMALL SECTION
OF WESTERN MISSISSIPPI. THIS WATCH DOES INCLUDE SUCH CITIES AS VICKSBURG
...NATCHEZ...AND GREENVILLE.

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 19, 4:48 AM CSTFlash Flood WarningJANBolivar, Sunflower, Washington4 hr
Feb 19, 4:48 AM CSTFlash Flood WarningJANCarroll, Grenada, Leflore4 hr
Feb 19, 4:48 AM CSTFlash Flood WarningJANTallahatchie, Yalobusha4 hr
Feb 19, 6:56 AM CSTFlash Flood WarningJANCalhoun3 hr
Feb 19, 6:56 AM CSTFlash Flood WarningJANMontgomery3 hr
Feb 19, 6:56 AM CSTFlash Flood WarningJANHumphreys, Sharkey3 hr
Feb 19, 7:25 AM CSTSevere Thunderstorm WarningJANYazoo20 min
Feb 19, 9:06 AM CSTFlash Flood WarningJANCarroll, Grenada, Leflore7 hr
Feb 19, 9:06 AM CSTFlash Flood WarningJANBolivar, Sunflower, Tallahatchie, Washington7 hr
Feb 19, 9:06 AM CSTFlash Flood WarningJANYalobusha7 hr
Feb 19, 9:36 AM CSTSevere Thunderstorm WarningJANNeshoba, Winston54 min
Feb 19, 10:46 AM CSTSevere Thunderstorm WarningJANSmith44 min
Feb 19, 1:36 PM CSTFlash Flood WarningJANLauderdale, Newton4 hr
Feb 19, 4:28 PM CSTFlash Flood WarningJANLeflore, Sunflower, Tallahatchie6 hr
Feb 19, 4:28 PM CSTFlash Flood WarningJANBolivar, Washington6 hr
Feb 19, 4:28 PM CSTFlash Flood WarningJANYalobusha6 hr
Feb 19, 4:52 PM CSTSevere Thunderstorm WarningJANLawrence53 min
Feb 19, 5:57 PM CSTFlash Flood WarningJANLauderdale7 hr
Feb 19, 5:57 PM CSTFlash Flood WarningJANNoxubee7 hr

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.