Alert archive / Louisiana / Flash Flood Warnings in 2012
Flash Flood Warning 16, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood warning at Mar 21, 2012, 1:52 AM CDT for 4 parishes in Louisiana; Union County, Arkansas. It was in force for 8 hr. 4 reports 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
- Mar 21, 2012, 1:52 AM CDT (06:52 UTC)
- Expired
- Mar 21, 2012, 9:45 AM CDT
- In force
- 8 hr
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Union County, AR, Bienville Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Union Parish, LA
The radar
The Shreveport radar (KSHV), 133 km from the middle of the area, began a volume at 06:55 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 21, 2:45 AM CDT | FLASH FLOOD | 2 N Bernice, LA | WATER ON ROADWAY ON 167 NORTH AT GRAFTON CROSSING. |
| Mar 21, 2:45 AM CDT | FLASH FLOOD | 3 W Farmerville, LA | LA 2 WEST, 3 MILES WEST OF FARMERVILLE REPORTED 6-8 INCHES OF WATER ON ROADWAY |
| Mar 21, 6:51 AM CDT | FLASH FLOOD | Ruston, LA | SHERIFFS OFFICE REPORTS NUMEROUS ROADS ACROSS THE PARISH HAVE BEEN FLOODED AND CLOSED |
| Mar 21, 7:00 AM CDT | FLASH FLOOD | 3 Ssw Jonesboro, LA | HWY 505 BARRICADED DUE TO OVER A FOOT OF WATER ON ROADWAY BETWEEN WYATT AND GANSVILLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 6.9 hours before the alert went out and 229 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
- 267 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 1256 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
978
WGUS54 KSHV 210652
FFWSHV
ARC139-LAC013-049-061-111-211045-
/O.NEW.KSHV.FF.W.0016.120321T0652Z-120321T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
152 AM CDT WED MAR 21 2012
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* FLASH FLOOD WARNING FOR...
JACKSON PARISH IN NORTH CENTRAL LOUISIANA...
THIS INCLUDES THE CITY OF JONESBORO...
LINCOLN PARISH IN NORTH CENTRAL LOUISIANA...
THIS INCLUDES THE CITIES OF...RUSTON...GRAMBLING...
UNION PARISH IN NORTH CENTRAL LOUISIANA...
EAST CENTRAL BIENVILLE PARISH IN NORTHWEST LOUISIANA...
EASTERN UNION COUNTY IN SOUTH CENTRAL ARKANSAS...
THIS INCLUDES THE CITY OF HUTTIG...
* UNTIL 545 AM CDT
* AT 142 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
WIDESPREAD HEAVY RAIN FROM SHOWERS AND THUNDERSTORMS OVER THE WARNED
AREA. SURFACE REPORTS AND RADAR ESTIMATES INDICATE THAT WIDESPREAD
RAINFALL TOTALS OF TWO AND A HALF TO NEARLY FOUR INCHES OF RAIN HAS
FALLEN ACROSS THE WARNED AREA. ADDITIONAL SHOWER AND THUNDERSTORM
ACTIVITY WILL SPREAD NORTH ACROSS THE AREA...PRODUCING AN ADDITIONAL
TWO TO THREE INCHES RAINFALL. THIS WILL FURTHER ENHANCE THE FLASH
FLOOD THREAT. THIS IS AN EXTREMELY DANGEROUS SITUATION! TRAVEL
ACROSS THE WARNED AREAS IS STRONGLY DISCOURAGED THIS MORNING!
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FARMERVILLE...BERNICE...URBANA...STRONG...LAWSON...LAPILE AND
CALION...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF TWO TO THREE INCHES ARE POSSIBLE IN
THE WARNED AREA.
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.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 3259 9223 3258 9241 3241 9242 3232 9231
3215 9231 3215 9281 3245 9277 3245 9288
3269 9286 3276 9282 3277 9272 3301 9273
3301 9267 3338 9258 3328 9244 3326 9223
3315 9210 3310 9213 3300 9206 3274 9205
$$
ELEVEN2 follow-up statements
062
WGUS54 KSHV 211039
FFWSHV
ARC139-LAC013-049-061-111-211445-
/O.EXT.KSHV.FF.W.0016.000000T0000Z-120321T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
539 AM CDT WED MAR 21 2012
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
JACKSON PARISH IN NORTH CENTRAL LOUISIANA...
THIS INCLUDES THE CITY OF JONESBORO...
LINCOLN PARISH IN NORTH CENTRAL LOUISIANA...
THIS INCLUDES THE CITIES OF...RUSTON...GRAMBLING...
UNION PARISH IN NORTH CENTRAL LOUISIANA...
EXTREME EAST CENTRAL BIENVILLE PARISH IN NORTHWEST LOUISIANA...
EASTERN UNION COUNTY IN SOUTH CENTRAL ARKANSAS...
THIS INCLUDES THE CITY OF HUTTIG...
* UNTIL 945 AM CDT
* AT 533 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED
TO DETECT WIDESPREAD MODERATE TO HEAVY RAIN FROM SHOWER AND
THUNDERSTORM ACTIVITY MOVING INTO THE WARNED AREA. LOCAL LAW
ENFORCEMENT OFFICIALS HAVE RELAYED REPORTS OF FLASH FLOODING OVER
THE WARNED AREA. SURFACE REPORTS AND RADAR ESTIMATES INDICATE THAT
RAINFALL AMOUNTS OF FOUR TO SIX INCHES HAVE FALLEN ACROSS THE WARNED
AREA. SOME ROADS ARE ALREADY FLOODED AND CLOSED... AND ADDITIONAL
HEAVY RAINFALL WILL CONTINUE TO PRODUCE MORE FLASH FLOODING. THIS IS
AN EXTREMELY DANGEROUS SITUATION! TRAVEL IS STRONGLY DISCOURAGED
THIS MORNING!
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FARMERVILLE...BERNICE...URBANA...STRONG...LAWSON...LAPILE AND
CALION...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN
THE WARNED AREA.
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.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3259 9223 3258 9241 3241 9242 3232 9231
3215 9231 3215 9281 3245 9277 3245 9288
3269 9286 3276 9282 3277 9272 3301 9273
3301 9267 3338 9258 3328 9244 3326 9223
3315 9210 3310 9213 3300 9206 3274 9205
$$
ELEVEN831
WGUS74 KSHV 211333
FFSSHV
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
833 AM CDT WED MAR 21 2012
ARC139-LAC013-049-061-111-211445-
/O.CON.KSHV.FF.W.0016.000000T0000Z-120321T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION AR-UNION LA-LINCOLN LA-JACKSON LA-BIENVILLE LA-
833 AM CDT WED MAR 21 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR UNION
COUNTY...AND BIENVILLE...JACKSON...LINCOLN AND UNION PARISHES...
AT 828 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
THAT HEAVY RAINFALL HAS MOVED EAST OF THESE PARISHES IN
LOUISIANA...AND UNION COUNTY IN ARKANSAS...BUT LIGHT TO MODERATE
RAINFALL CONTINUES OVER THE AREA.
FLASH FLOODING OF STREETS IN RURAL AND URBAN AREAS WILL CONTINUE
THROUGH MID MORNING.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FARMERVILLE...BERNICE...URBANA...STRONG...LAWSON...LAPILE...HUTTIG
AND CALION
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 3259 9223 3258 9241 3241 9242 3232 9231
3215 9231 3215 9281 3245 9277 3245 9288
3269 9286 3276 9282 3277 9272 3301 9273
3301 9267 3338 9258 3328 9244 3326 9223
3315 9210 3310 9213 3300 9206 3274 9205
$$
03The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 8:55 PM CDT | Flash Flood Warning | SHV | Grant, Natchitoches, Sabine, Winn | 10 hr |
| Mar 20, 9:02 PM CDT | River Flood Warning | SHV | Bienville, Bossier, Red River, Webster | 11 days |
| Mar 20, 9:03 PM CDT | Tornado Warning | SHV | Natchitoches | 27 min |
| Mar 20, 9:15 PM CDT | Flash Flood Warning | SHV | Bienville, De Soto, Red River | 9 hr |
| Mar 20, 9:24 PM CDT | Tornado Warning | SHV | Natchitoches | 36 min |
| Mar 20, 10:20 PM CDT | Tornado Warning | SHV | Grant, Natchitoches | 40 min |
| Mar 20, 10:50 PM CDT | Flash Flood Warning | SHV | Bossier, Claiborne, Webster | 10 hr |
| Mar 21, 2:49 AM CDT | Tornado Warning | SHV | Grant, Winn | 26 min |
| Mar 21, 3:14 AM CDT | Tornado Warning | SHV | Jackson, Winn | 46 min |
| Mar 21, 5:41 AM CDT | Tornado Warning | SHV | Jackson, Winn | 34 min |
| Mar 21, 6:16 AM CDT | Flash Flood Warning | SHV | Bienville, Red River | 3 hr |
| Mar 21, 6:47 AM CDT | Flash Flood Warning | SHV | Grant, Natchitoches, Red River, Sabine, Winn | 4 hr |
| Mar 21, 8:44 AM CDT | Flash Flood Warning | SHV | Claiborne | 2 hr |
| Mar 21, 9:36 AM CDT | Flash Flood Warning | SHV | Union | 114 min |
| Mar 21, 10:51 AM CDT | Flash Flood Warning | SHV | Grant, Natchitoches, Winn | 3 hr |
| Mar 21, 1:53 PM CDT | Areal Flood Warning | SHV | Natchitoches | 6 hr |
| Mar 20, 7:27 PM CDT | River Flood Warning | SHV | Ashley, Union | 28 days |
Nearby
Flash Flood Warnings in Louisiana, 2012Flash Flood Warnings in Arkansas, 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; radar from the NEXRAD Level II archive.