Alert archive / Louisiana / Flash Flood Warnings in 2012
Flash Flood Warning 32, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood warning at Aug 7, 2012, 9:00 AM CDT for 4 parishes in Louisiana. It was in force for 108 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 7, 2012, 9:00 AM CDT (14:00 UTC)
- Expired
- Aug 7, 2012, 10:48 AM CDT
- In force
- 108 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Grant Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Winn Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 7, 10:00 AM CDT | FLASH FLOOD | 1 W Pollock, LA | SEVERAL INCHES OF WATER COVERED PORTIONS OF STUART LAKE ROAD NEAR POLLOCK. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Shreveport, LA (KBAD), launched 12:00Z, 2.0 hours before the alert went out and 146 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.
- Mixed-layer CAPE
- 2594 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 932 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
347
WGUS54 KSHV 071400
FFWSHV
LAC043-059-069-127-071700-
/O.NEW.KSHV.FF.W.0032.120807T1400Z-120807T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
900 AM CDT TUE AUG 7 2012
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* FLASH FLOOD WARNING FOR...
GRANT PARISH IN NORTH CENTRAL LOUISIANA...
WESTERN LA SALLE PARISH IN NORTH CENTRAL LOUISIANA...
WINN PARISH IN NORTH CENTRAL LOUISIANA...
THIS INCLUDES THE CITY OF WINNFIELD...
EASTERN NATCHITOCHES PARISH IN NORTHWEST LOUISIANA...
* UNTIL NOON CDT
* AT 854 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
VERY HEAVY RAIN FROM A COMPLEX OF THUNDERSTORMS OVER THE WARNED
AREA. SOME AREAS HAVE RECEIVED RAINFALL AMOUNTS IN EXCESS OF 4
INCHES...AND ADDITIONAL RAINFALL IS EXPECTED DURING THE NEXT
SEVERAL HOURS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SIKES...
HUDSON...GOLDONNA AND DODSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE
WARNED AREA.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3147 9222 3142 9243 3140 9269 3151 9272
3139 9289 3137 9312 3211 9289 3212 9233
$$
232 follow-up statements
644
WGUS74 KSHV 071527
FFSSHV
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1027 AM CDT TUE AUG 7 2012
LAC059-127-071536-
/O.CAN.KSHV.FF.W.0032.000000T0000Z-120807T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LA SALLE LA-WINN LA-
1027 AM CDT TUE AUG 7 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WINN AND LA SALLE
PARISHES...
LAT...LON 3142 9243 3140 9269 3151 9272 3138 9289
3139 9296 3171 9298 3171 9262 3179 9262
3180 9237 3178 9235 3161 9238 3152 9227
3150 9228 3148 9222
$$
LAC043-069-071700-
/O.CON.KSHV.FF.W.0032.000000T0000Z-120807T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATCHITOCHES LA-GRANT LA-
1027 AM CDT TUE AUG 7 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR GRANT
AND NATCHITOCHES PARISHES...
AT 1023 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MONTGOMERY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3142 9243 3140 9269 3151 9272 3138 9289
3139 9296 3171 9298 3171 9262 3179 9262
3180 9237 3178 9235 3161 9238 3152 9227
3150 9228 3148 9222
$$
23350
WGUS74 KSHV 071548
FFSSHV
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1048 AM CDT TUE AUG 7 2012
LAC043-069-071559-
/O.CAN.KSHV.FF.W.0032.000000T0000Z-120807T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATCHITOCHES LA-GRANT LA-
1048 AM CDT TUE AUG 7 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR GRANT AND
NATCHITOCHES PARISHES...
LAT...LON 3142 9243 3140 9269 3151 9272 3138 9289
3139 9296 3171 9298 3171 9262 3179 9262
3180 9237 3178 9235 3161 9238 3152 9227
3150 9228 3148 9222
$$
23The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:30 AM CDT | Areal Flood Advisory | SHV | Caldwell, Grant, LaSalle, Natchitoches, Winn | 60 min |
| Aug 7, 5:04 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Red River, Sabine | 41 min |
Nearby
Flash Flood Warnings in Louisiana, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.