Alert archive / Mississippi / Flash Flood Warnings in 2003

Flash Flood Warning 50, NWS Memphis, TN

July 18, 2003DeSoto County, Mississippi

NWS Memphis, TN issued this flash flood warning at Jul 18, 2003, 4:33 PM CDT for DeSoto County, Mississippi. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 18, 2003, 4:33 PM CDT (21:33 UTC)
Expired
Jul 18, 2003, 6:30 PM CDT
In force
117 min
Issued by
NWS Memphis, TN
Area
Counties, with a storm outline in the text

County DeSoto County, MS

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 9.6 hours before the alert went out and 11 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, Little Rock, AR at 12:00Z on 2003-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2491 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, Little Rock, AR at 12:00Z on 2003-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
2491 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1286 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KMEG 182136
FFWMEM
MSC033-182330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
433 PM CDT FRI JUL 18 2003

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DESOTO COUNTY IN NORTHWEST MISSISSIPPI

* UNTIL 630 PM CDT.

* AT 430 PM CDT...WEATHER RADAR INDICATED VERY HEAVY RAIN OVER THE 
WESTERN HALF OF DESOTO COUNTY. THE HEAVIEST RAIN WAS OCCURRING 
BETWEEN WALLS AND SOUTHHAVEN AND SOUTH OF LAKE CORMORANT. FLOODING IS 
OCCURRING ON SOME STREETS AND LOW LYING AREAS.

* CITIES AFFECTED THROUGH 630 PM CDT INCLUDE...
  WALLS...SOUTHAVEN...LYNCHBURG...HORN LAKE...HERNANDO...EUDORA

.A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
MOVE TO HIGHER GROUND IMMEDIATELY. DO NOT ATTEMPT TO CROSS FLOODED
ROADWAYS.

.STAY TUNED TO THIS NATIONAL WEATHER SERVICE BROADCAST FOR THE LATEST
UPDATES AND INFORMATION. TO REPORT FLOODING ONLY...CALL 1 800 4 3 2 0
8 7 5.

LAT...LON 3499 8992 3479 8994 3476 9019 3500 9020

$$

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 3:42 PM CDTSevere Thunderstorm WarningMEGDeSoto33 min
Jul 18, 4:01 PM CDTSevere Thunderstorm WarningMEGTunica29 min
Jul 18, 4:14 PM CDTSevere Thunderstorm WarningMEGDeSoto31 min
Jul 18, 4:31 PM CDTSevere Thunderstorm WarningMEGTunica29 min
Jul 18, 4:49 PM CDTSevere Thunderstorm WarningMEGTate26 min

Nearby

Flash Flood Warnings in Mississippi, 2003Every flash flood warning in 2003

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.