Alert archive / Louisiana / Flash Flood Warnings in 2005

Flash Flood Warning 2, NWS Shreveport, LA

April 11, 2005Caddo Parish, Louisiana

NWS Shreveport, LA issued this flash flood warning at Apr 11, 2005, 5:56 AM CDT for Caddo Parish, Louisiana. 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: Apr 11, 2005, 5:56 AM CDT (10:56 UTC)
Expired: Apr 11, 2005, 10:00 AM CDT
In force: 4 hr
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Caddo Parish, LA

The radar

The Shreveport radar (KSHV), 18 km from the middle of the area, began a volume at 10:58 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

Shreveport, LA (KSHV), launched 00:00Z, 10.9 hours before the alert went out and 15 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: 196 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1167 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSHV 111100
FFWSHV
LAC017-111500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
556 AM CDT MON APR 11 2005

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CADDO PARISH IN NORTHWEST LOUISIANA

* UNTIL 1000 AM CDT

* AT 547 AM CDT...SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF THUNDERSTORMS PRODUCING HEAVY RAIN OVER CADDO
  PARISH. INDIVIDUAL STORMS IN THE LINE WERE MOVING NORTHEAST AT
  35 MPH...WHILE THE OVERALL LINE WAS CREEPING SLOWLY EASTWARD AT
  7 MPH. HEAVY RAIN WILL FALL REPEATEDLY OVER THE SAME AREAS...
  PRODUCING OVER TWO INCHES OF RAIN IN SOME LOCATIONS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD
WARNING FOR...
  CADDO PARISH IN NORTHWEST LOUISIANA
UNTIL 1000 AM CDT.

LAT...LON 3286 9380 3277 9380 3274 9384 3264 9376
      3241 9369 3228 9354 3227 9360 3236 9376
      3222 9391 3220 9400 3292 9400 3302 9387
      3302 9384

$$

17

2 follow-up statements

000 
WGUS74 KSHV 111155
FFSSHV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
653 AM CDT MON APR 11 2005

LAC017-111500-
CADDO LA-
653 AM CDT MON APR 11 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 1000 AM CDT FOR CADDO
PARISH...

AT 645 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH
FLOODING NEAR PINES AND INTERSTATE 20...NEAR LINE AND 
EVANGELINE...AND AT OTHER SPOTS ACROSS SHREVEPORT. NATIONAL 
WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS STILL TO
THE SOUTHWEST OF CADDO PARISH...MOVING NORTHEAST AT 40 MPH. 
THEREFORE ANOTHER ROUND OR TWO OF HEAVY RAIN IS LIKELY THIS 
MORNING.

ADDITIONAL RAINFALL AMOUNTS OVER ONE INCH ARE POSSIBLE IN THE
WARNED AREA.

REMEMBER...MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO 
NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS...OR LOW 
WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A 
SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

LAT...LON 3286 9380 3278 9380 3274 9384 3263 9376
      3241 9369 3228 9356 3238 9374 3224 9389
      3222 9398 3292 9399 3302 9387 3302 9384

$$

17

000 
WGUS74 KSHV 111358
FFSSHV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
853 AM CDT MON APR 11 2005

LAC017-111500-
CADDO LA-
853 AM CDT MON APR 11 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 1000 AM CDT FOR CADDO
PARISH...

AT 850 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED 
AREA. VERY HEAVY RAINFALL OF 4 TO 5 INCHES HAS OCCURRED OVER SOUTH 
AND SOUTHEAST SHREVEPORT. THERE ARE NUMEROUS REPORTS OF STREET 
FLOODING IN EAST...SOUTHEAST...AND SOUTH SHREVEPORT. 

FLASH FLOODING WAS OCCURRING AT 830 AM ALONG OCKLEY DRIVE...AND 
SOUTH ALONG LINE AVENUE...AND FARTHER SOUTH ALONG ELLERBE ROAD. 
ADDITIONAL FLOODING IS LIKELY ALONG BERT KOUNS ROAD...AND ALONG 
YOUREE DRIVE.

REMEMBER...TURN AROUND DONT DROWN. DO NOT TRY TO DRIVE THROUGH AREAS 
WHERE WATER CROSSES THE ROAD.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

LAT...LON 3268 9389 3271 9385 3275 9385 3263 9378
      3241 9370 3228 9356 3239 9375 3224 9389
      3223 9401 3261 9397 3266 9395 3271 9395

$$

03

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 9:50 AM CDT	Flash Flood Warning	SHV	Claiborne	4 hr
Apr 11, 9:53 AM CDT	Flash Flood Warning	SHV	Caddo	3 hr
Apr 11, 11:37 AM CDT	Severe Thunderstorm Warning	SHV	Sabine	53 min

Nearby

Flash Flood Warnings in Louisiana, 2005 Every flash flood warning in 2005

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.