Alert archive / Mississippi / Flash Flood Warnings in 1993

Flash Flood Warning 10, NWS Jackson, MS

January 20, 1993Lamar County, Marion County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jan 20, 1993, 7:10 PM CST for Lamar County, Marion County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jan 20, 1993, 7:10 PM CST (01:10 UTC)
Expired
Jan 20, 1993, 10:00 PM CST
In force
3 hr
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Lamar County, MS, Marion County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.2 hours before the alert went out and 108 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 00:00Z on 1993-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 334 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 00:00Z on 1993-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 431 square meters per square second.19395878Sfc1 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
334 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
518 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
431 m²/s²
0-3 km storm-relative helicity
463 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Jan 20, 3:57 PM CST, 3 hours 13 minutes before
MSZALL-202200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
350 PM CST WED JAN 20 1993

...DISREGARD ERRONEOUS FLASH FLOOD WARNING FOR 921 AM ISSUED
   FOR FORREST AND LAMAR COUNTIES...

A FLASH FLOOD WARNING FOR FORREST AND LAMAR COUNTIES WAS
MISTAKENLY TRANSMITTED OVER THE NATIONAL WEATHER WIRE CIRCUIT.
PLEASE DISREGARD THIS PARTICULAR MESSAGE. FLASH FLOOD WARNINGS FOR
THESE COUNTIES MAY BE NECESSARY LATER THIS EVENIN.

CONDITIONS COULD GET WORSE THROUGH THE REMAINDER OF THE PREDAWN
HOURS...DURING THE DAY WEDNESDAY...AND WEDNESDAY NIGHT.  MORE HEAVY
RAINFALL AND A FEW SEVERE THUNDERSTORMS ARE POSSIBLE OVER THE NEXT 24
HOURS.
Special weather statement, Jan 20, 4:54 PM CST, 2 hours 16 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-202345-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
430 PM CST WED JAN 20 1993

JACKSON RADAR INDICATED EXTENSIVE COVERAGE OF LIGHT RAIN AND RAIN ACROSS
THE LOWER TWO-THIRDS OF MISSISSIPPI.  THIS RAIN AREA INCLUDED ISOLATED
THUNDERSTORMS WITH HEAVY RAINFALL THAT WERE LOCATED IN THE DELTA AND IN
SOUTH MISSISSIPPI.

THE THUNDERSTORMS IN THE DELTA WERE LOCATED FROM THE VICINITY OF
GREENVILLE TO THE VICINITY OF LAKE PROVIDENCE LOUISIANA.  THIS ACTIVITY
WAS IMMEDIATELY ALONG A COLD FRONT THAT EXTENDED ALONG THE MISSISSIPPI
RIVER IN ARKANSAS AND EXTREME NORTHEAST LOUISIANA AND CONTINUING TO NEAR
ALEXANDRIA LOUISIANA.

THE THUNDERSTORMS AND HEAVIER RAINFALL IN THE SOUTH WERE LOCATED NEAR
COLUMBIA MISSISSIPPI AND EXTENDED NORTHWARD TO THE VICINITY OF RALEIGH.
PEOPLE IN FLOOD PRONE AREAS SHOULD REMAIN ALERT TO THE WEATHER SITUATION
THROUGHOUT THE EVENING AND BE PREPARED TO TAKE ACTION SHOULD A FLOOD
WARNING BE ISSUED FOR YOUR COUNTY OR AREA.  THE RAINS ARE EXPECTED TO
CONTINUE THROUGHOUT THE EVENING AND MAY ACCUMULATE RAPIDLY IN SOME
LOCAL AREAS AFTER NIGHTFALL.

MOVEMENT OF THE LRAIN AREAS AND THUNDERSTORMS WAS TO THE NORTHEAST AT
35 MILES AN HOUR.
Special weather statement, Jan 20, 5:49 PM CST, 1 hour 21 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-202345-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
530 PM CST WED JAN 20 1993

AT 530 PM CST JACKSON RADAR INDICATED CONTINUING COVERAGE OF MOSTLY
LIGHT RAIN ACROSS MUCH OF CENTRAL AND SOUTHWEST MISSISSIPPI.  AN AREA
OF MODERATE RAINFALL CONTAINING ISOLATED EMBEDDED THUNDERSTORMS WITH
HEAVY RAINFALL WAS SITUATED ACROSS SOUTH MISSISSIPPI FROM NEAR BAY
SPRINGS TO SOUTH OF MCCOMB AND CONTINUED INTO SOUTHEAST LOUISIANA.

THE AREA OF MODERATE TO HEAVY RAIN INCLUDED THE VICINITY OF HATTIESBURG
WHERE SOME URBAN FLOODING HAD OCCURRED EARLIER TODAY.  AN ADDITIONAL
1 TO 2 INCHES OF RAINFALL IS POSSIBLE FROM THIS ACTIVITY DURING THE NEXT
SEVERAL HOURS.  PEOPLE IN SOUTH AND SOUTHEAST MISSISSIPPI SHOULD CONTINUE
TO MONITOR THEIR NOAA WEATHER RADIO...LOCAL RADIO AND TV FOR THE LATEST
STATEMENTS AND POSSIBLE WARNINGS AND BE PREPARED TO ACT ACCORDINGLY.

MEANWHILE...THE RAIN AREA IN THE EXTREME WESTERN PART OF THE STATE WAS
DIMINISHING IN COVERAGE FROM WEST TO EAST AS THE COLD FRONT SLOWLY
MOVES EASTWARD.

THE MOVEMENT OF ALL THE RAIN AREAS WAS TO THE NORTHEAST AT ABOUT
35 MILES AN HOUR.
Special weather statement, Jan 20, 5:50 PM CST, 1 hour 20 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-210045-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY ...CORRECTED FOR TIME...
NATIONAL WEATHER SERVICE JACKSON MS
530 PM CST WED JAN 20 1993

AT 530 PM CST JACKSON RADAR INDICATED CONTINUING COVERAGE OF MOSTLY
LIGHT RAIN ACROSS MUCH OF CENTRAL AND SOUTHWEST MISSISSIPPI.  AN AREA
OF MODERATE RAINFALL CONTAINING ISOLATED EMBEDDED THUNDERSTORMS WITH
HEAVY RAINFALL WAS SITUATED ACROSS SOUTH MISSISSIPPI FROM NEAR BAY
SPRINGS TO SOUTH OF MCCOMB AND CONTINUED INTO SOUTHEAST LOUISIANA.

THE AREA OF MODERATE TO HEAVY RAIN INCLUDED THE VICINITY OF HATTIESBURG
WHERE SOME URBAN FLOODING HAD OCCURRED EARLIER TODAY.  AN ADDITIONAL
1 TO 2 INCHES OF RAINFALL IS POSSIBLE FROM THIS ACTIVITY DURING THE NEXT
SEVERAL HOURS.  PEOPLE IN SOUTH AND SOUTHEAST MISSISSIPPI SHOULD CONTINUE
TO MONITOR THEIR NOAA WEATHER RADIO...LOCAL RADIO AND TV FOR THE LATEST
STATEMENTS AND POSSIBLE WARNINGS AND BE PREPARED TO ACT ACCORDINGLY.

MEANWHILE...THE RAIN AREA IN THE EXTREME WESTERN PART OF THE STATE WAS
DIMINISHING IN COVERAGE FROM WEST TO EAST AS THE COLD FRONT SLOWLY
MOVES EASTWARD.

THE MOVEMENT OF ALL THE RAIN AREAS WAS TO THE NORTHEAST AT ABOUT
35 MILES AN HOUR.
Special weather statement, Jan 20, 6:52 PM CST, 18 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-210145-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
630 PM CST WED JAN 20 1993

AT 630 PM CST JACKSON RADAR INDICATED AN AREA OF RAIN AND THUNDERSTORMS
ACROSS SOUTHEAST MISSISSIPPI AND SOUTHEAST LOUISIANA. THE AREA WAS
ORIENTED GENERALLY ALONG U.S. INTERSTATE HIGHWAY 59 FROM MERIDIAN TO
POPLARVILLE...TO THE NORTHWEST SHORE OF LAKE PONCHARTRAIN AND INCLUDED
THE CITIES OF HATTIESBURG AND LAUREL.  RAINFALL ACROSS THIS AREA WAS
FALLING AT A RATE OF 1/2 TO 1 INCH PER HOUR AND FALLING ON GROUND THAT
IS ALREADY SATURATED.

PEOPLE IN SOUTHEAST MISSISSIPPI...PARTICULARLY THOSE IN AREAS WHERE FLOOD
WARNINGS HAVE BEEN ISSUED SHOULD REMAIN WEATHER ALERT AND BE READY TO MOVE
TO HIGHER LOCATIONS SHOULD FLOODING COMMENCE.  AVOID DRIVING ACROSS WATER
COVERED ROADS AND BRIDGES.  MOST DEATHS ASSOCIATED WITH FLOOD WATERS IS A
RESULT OF UNDERESTIMATING THE DEPTH AND SWIFTNESS OF THE FLOOD WATERS.
ELSEWHERE...MOSTLY LIGHT RAIN COVERED A LARGE PART OF CENTRAL
MISSISSIPPI.  A FEW PATCHES OF SOMEWHAT HEAVIER RAIN WAS LOCATED IN THE
VICINITY OF VICKSBURG.

THE MOVEMENT OF ALL THE RAIN WAS TO THE N<ORTHEAST AT 35 MILES AN HOUR.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 20, 7:10 PM CSTFlash Flood WarningJANWalthall3 hr
Jan 20, 9:32 PM CSTFlash Flood WarningJANClarke12 hr
Jan 20, 10:27 PM CSTFlash Flood WarningJANLamar, Marion3 hr
Jan 20, 10:34 PM CSTFlash Flood WarningJANPike, Walthall86 min
Jan 20, 11:00 PM CSTFlash Flood WarningJANForrest3 hr

Nearby

Flash Flood Warnings in Mississippi, 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.