Alert archive / Mississippi / Flash Flood Warnings in 2002

Flash Flood Warning 3, NWS New Orleans, LA

August 5, 2002Walthall County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Aug 5, 2002, 11:27 AM CDT for Walthall County, Mississippi. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 5, 2002, 11:27 AM CDT (16:27 UTC)
Expired
Aug 5, 2002, 2:30 PM CDT
In force
3 hr
Issued by
NWS New Orleans, LA
Area
Whole counties

County Walthall County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.5 hours before the alert went out and 107 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 2002-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 612 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 2002-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 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
612 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
467 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
34 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 
WGUS54 KLIX 051627
FFWNEW
MSC147-051930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1125 AM CDT MON AUG 5 2002

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WALTHALL COUNTY IN SOUTHERN MISSISSIPPI

* UNTIL 230 PM CDT

* AT 1121 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN OVER TYLERTOWN IN THE PAST HOUR. RADAR INDICATED UP TO 6 INCHES 
  IN THE TYLERTOWN AREA. THIS AREA OF EXCESSIVE RAINFALL IS ABOUT 10 
  MILES WIDE DRIFTING WESTNORTHWEST.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABONDONED. MOVE TO HIGHER 
GROUND. DANGEROUS FLOODING IS LIKELY MAINLY IN PORTIONS OF THE SOUTH 
HALF OF WALTHALL COUNTY DURING THE NEXT 2 TO 3 HOURS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.
1 follow-up statement
000 
WGUS74 KLIX 051932
FFSNEW
MSC147-051945-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
230 PM CDT MON AUG 5 2002

...THE FLASH FLOOD WARNING EXPIRES FOR WALTHALL COUNTY...

THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR WALTHALL COUNTY HAS 
EXPIRED. WALTHALL COUNTY SHERIFF OFFICE REPORTED NO FLOODING OF 
BUSINESSES OR HOMES IN WALTHALL COUNTY. THE HEAVIEST RAINFALL HAS 
MOVED NORTH OF THE WARNED AREA. THEREFORE...THE FLASH FLOOD WARNING 
HAS BEEN ALLOWED TO EXPIRE.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 5, 11:52 AM CDTFlash Flood WarningLIXJackson3 hr

Nearby

Flash Flood Warnings in Mississippi, 2002Every flash flood warning in 2002

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.