Alert archive / Louisiana / Flash Flood Warnings in 2003

Flash Flood Warning 18, NWS Jackson, MS

February 21, 2003Tensas Parish, Louisiana

NWS Jackson, MS issued this flash flood warning at Feb 21, 2003, 7:45 PM CST for Tensas Parish, Louisiana. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Feb 21, 2003, 7:45 PM CST (01:45 UTC)
Expired: Feb 21, 2003, 9:45 PM CST
In force: 2 hr
Issued by: NWS Jackson, MS
Area: Counties, with a storm outline in the text

County Tensas Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.8 hours before the alert went out and 136 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 589 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 289 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 KJAN 220148
FFWJAN
LAC107-220345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
745 PM CST FRI FEB 21 2003

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  TENSAS PARISH IN NORTHEAST LOUISIANA

* UNTIL 945 PM CST

* AT 745 PM CST...WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN
  OVER TENSAS PARISH...OR ABOUT 15 MILES NORTH OF FERRIDAY...MOVING
  NORTHEAST AT 20 MPH.

RADAR ESTIMATED RAINFALL AMOUNTS OF 5 TO 6 INCHES OF RAINFALL HAVE 
FALLEN SINCE THIS MORNING.  AN ADDITIONAL INCH OF RAIN IS EXPECTED 
OVER THE NEXT TWO HOURS.

NEWELLTON POLICE DEPARTMENT IN TENSAS COUNTY REPORTED THAT HIGHWAY 
3209 NEAR US 65 AT WATERPROOF WAS UNDER WATER.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.

MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.

LAT...LON 3185 9153 3185 9145 3190 9130 3210 9139
          3192 9147

$$

GAGAN

1 follow-up statement

000 
WGUS74 KJAN 220344
FFSJAN
LAC107-220440-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
940 PM CST FRI FEB 21 2003

FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 945 PM CST FOR
TENSAS PARISH IN NORTHEAST LOUISIANA

AT 940 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT MOST OF THE RAINFALL HAS MOVED WELL EAST OF THE AREA.  
HOWEVER...TENSAS PARISH SHERIFFS OFFICE REPORTED THAT TWO 
SUBDIVISIONS IN WATERPROOF WERE UNDER WATER. 

ALTHOUGH FLOODING WILL CONTINUE FOR SOME TIME OVERNIGHT...THE LACK 
OF SIGNIFICANT ADDITIONAL RAINFALL SHOULD ALLOW THE WATER TO 
GRADUALLY RECEDE OVERNIGHT. 

$$

CRAVEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 21, 6:14 PM CST	Flash Flood Warning	JAN	East Carroll, Morehouse, Richland, West Carroll	6 hr

Nearby

Flash Flood Warnings in Louisiana, 2003 Every 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.