Alert archive / Louisiana / Flash Flood Warnings in 2004

Flash Flood Warning 79, NWS Jackson, MS

July 17, 2004Morehouse Parish, Louisiana; Ashley County, Arkansas

NWS Jackson, MS issued this flash flood warning at Jul 17, 2004, 6:29 AM CDT for Morehouse Parish, Louisiana; Ashley County, Arkansas. It was in force for 4 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: Jul 17, 2004, 6:29 AM CDT (11:29 UTC)
Expired: Jul 17, 2004, 10:30 AM CDT
In force: 4 hr
Issued by: NWS Jackson, MS
Area: Counties, with a storm outline in the text

Counties Ashley County, AR, Morehouse Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 176 km from the middle of the area, began a volume at 11:29 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 11.5 hours before the alert went out and 166 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: 227 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 1375 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 424 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KJAN 171132
FFWJAN
ARC003-LAC067-171530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
629 AM CDT SAT JUL 17 2004

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ASHLEY COUNTY IN SOUTHEAST ARKANSAS
  MOREHOUSE PARISH IN NORTHEAST LOUISIANA

* UNTIL 1030 AM CDT

* AT 629 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED            
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER CENTRAL MOREHOUSE     
  PARISH. THE STORMS ARE MOVING SOUTHEAST AT 20 MPH. RAINFALL RATES  
  OF 2 INCHES PER HOUR HAVE BEEN OBSERVED ON DOPPLER RADAR.

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 3302 9145 3302 9208 3270 9205 3272 9197
      3268 9193 3260 9192 3254 9191 3258 9183
      3264 9171 3274 9164 3287 9156 3294 9146

$$

2 follow-up statements

000 
WGUS74 KJAN 171234 CCA
FFSJAN
ARC003-LAC067-171530-

FLASH FLOOD STATEMENT...CORRECTION
NATIONAL WEATHER SERVICE JACKSON MS
715 AM CDT SAT JUL 17 2004

FLASH FLOOD WARNINGS REMAIN IN EFFECT UNTIL 1030 AM CDT FOR

ASHLEY COUNTY IN SOUTHEAST ARKANSAS
MOREHOUSE PARISH IN NORTHEAST LOUISIANA

THE FLASH FLOOD WARNINGS FOR ASHLEY COUNTY AND MOREHOUSE PARISH 
REMAINS IN EFFECT. LAW ENFORCEMENT IN HAMBURG...IN ASHLEY COUNTY AND 
IN BASTROP...IN MOREHOUSE PARISH HAVE REPORTED VERY HEAVY RAINFALL 
WITH NUMEROUS STREETS FLOODED. THEREFORE THE WARNING REMAINS IN 
EFFECT. THE RAIN SHOULD BEGIN TO TAPER OFF FROM NORTH TO SOUTH OVER 
THE NEXT TWO HOURS.

$$

000 
WGUS74 KJAN 171442
FFSJAN
LAC067-171535-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
936 AM CDT SAT JUL 17 2004

FLASH FLOOD WARNING HAS BEEN CANCELED FOR...

MOREHOUSE PARISH IN NORTHEAST LOUISIANA

AT 936 AM WEATHER SERVICE RADAR INDICATED LIGHT RAIN ENDING ACROSS 
SOUTHERN MOREHOUSE PARISH WITH NO ADDITIONAL THUNDERSTORMS EXPECTED 
THIS MORNING. THUS THE RISK OF LOCALIZED FLOODING HAS DIMINISHED.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:16 AM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Morehouse, West Carroll	59 min
Jul 17, 1:48 AM CDT	Severe Thunderstorm Warning	JAN	Chicot	37 min
Jul 17, 2:15 AM CDT	Severe Thunderstorm Warning	JAN	Ashley	45 min
Jul 17, 2:19 AM CDT	Severe Thunderstorm Warning	JAN	Chicot	46 min
Jul 17, 2:57 AM CDT	Severe Thunderstorm Warning	JAN	Ashley	38 min
Jul 17, 3:04 AM CDT	Severe Thunderstorm Warning	JAN	Chicot	46 min

Nearby

Flash Flood Warnings in Louisiana, 2004 Flash Flood Warnings in Arkansas, 2004 Every flash flood warning in 2004

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; radar from the NEXRAD Level II archive.