Alert archive / Mississippi / Flash Flood Warnings in 1990

Flash Flood Warning 30, NWS Jackson, MS

May 31, 1990Warren County, Mississippi

NWS Jackson, MS issued this flash flood warning at May 31, 1990, 2:06 PM CDT for Warren County, Mississippi. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
May 31, 1990, 2:06 PM CDT (19:06 UTC)
Expired
May 31, 1990, 9:00 PM CDT
In force
7 hr
Issued by
NWS Jackson, MS
Area
Whole counties

County Warren County, MS

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

Jackson, MS (KJAN), launched 12:00Z, 7.1 hours before the alert went out and 73 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 1990-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1990-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
908 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
98 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 311910
FFWJAN
MSC149-010200-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
206 PM CDT THU MAY 31 1990

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  900 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN WEST CENTRAL MISSISSIPPI

   ...WARREN COUNTY

THUNDERSTORMS CONTINUE TO TRAIL OVER WARREN COUNTY THIS AFTERNOON. A
LONG FETCH OF SHOWERS AND THUNDERSTORMS EXTENDED WESTWARD ACROSS
LOUISIANA AND TEXAS. THIS ACTIVITY WILL CONTINUE TO TRACK OVER THE
WARREN COUNTY AREA THIS AFTERNOON AND EVENING.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT
TO CROSS BRIDGES OR LOW SPOTS IF WATER COVERS THE ROAD;.  NEVER
TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.

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 31, 1:44 PM CDT, 22 minutes before
MSZALL-311945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
141 PM CDT THU MAY 31 1990

A FLASH FLOOD WATCH REMAINS IN EFFECT FOR MUCH OF WEST MISSISSIPPI
THIS AFTERNOON.

AT 130 PM...JACKSON RADAR INDICATED A BAND OF SCATTERED THUNDERSTORMS
WITH LOCALY HEAVY RAIN EXTENDING FROM NEAR PORT GIBSON TO NEAR COLUMBI
THE HEAVIEST THUNDERSTORMS WERE LOCATED 10 MILES WEST OF CRYSTAL
SPRINGS, 30 MILES WEST OF PORT GIBSON, AND 15 MILES SOUTH OF COLUMBIA.

THE BAND HAS MOVED LITTLE DURING THE PAST SEVERAL HOURS. THIS HAS RESU
IN FLOODING OF LOW LYING AREAS, ESPECIALLY IN THE VICKSBURG AREA.

PERSONS IN VICKSBURG AND WEST MISISSIPPI SHOULD REMAIN ALERT TO FLASH
FLOODING FROM THUNDERSTORMS THIS AFTERNOON. MOTORISTS ARE ADVISED NOT
TO DRIVE THORUGH WATER OF UNKNOWN DEPTH.

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 10:59 AM CDTFlash Flood WarningJANWarren3 hr
May 31, 1:00 PM CDTSevere Thunderstorm WarningJANHinds30 min

Nearby

Flash Flood Warnings in Mississippi, 1990Every flash flood warning in 1990

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.