Alert archive / Louisiana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 302, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Jul 13, 2011, 4:26 PM CDT for Ouachita Parish, Union Parish, Louisiana. It was in force for 43 min. 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 13, 2011, 4:26 PM CDT (21:26 UTC)
- Expired
- Jul 13, 2011, 5:09 PM CDT
- In force
- 43 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Ouachita Parish, LA, Union Parish, LA
The radar
The Shreveport radar (KSHV), 170 km from the middle of the area, began a volume at 21:26 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.4 hours before the alert went out and 161 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
- 1051 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 1313 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
894
WUUS54 KSHV 132126
SVRSHV
LAC073-111-132230-
/O.NEW.KSHV.SV.W.0302.110713T2126Z-110713T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
ISSUED BY NATIONAL WEATHER SERVICE FORT WORTH TX
426 PM CDT WED JUL 13 2011
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN OUACHITA PARISH IN NORTH CENTRAL LOUISIANA...
SOUTHEASTERN UNION PARISH IN NORTH CENTRAL LOUISIANA...
* UNTIL 530 PM CDT
* AT 426 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 8 MILES
WEST OF STERLINGTON...AND MOVING SOUTHEAST AT 5 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STERLINGTON BY 435 PM
CLAIBORNE BY 525 PM
WEST MONROE...MONROE AND SWARTZ BY 530 PM
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AND
STAY INSIDE...AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
&&
LAT...LON 3251 9190 3246 9194 3251 9223 3254 9230
3270 9234 3284 9210 3278 9204 3272 9205
3271 9204 3272 9199 3263 9190 3258 9191
3254 9189
TIME...MOT...LOC 2126Z 333DEG 6KT 3265 9219
$$3 follow-up statements
322
WWUS54 KSHV 132144
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
ISSUED BY NATIONAL WEATHER SERVICE FORT WORTH TX
444 PM CDT WED JUL 13 2011
LAC073-111-132230-
/O.CON.KSHV.SV.W.0302.000000T0000Z-110713T2230Z/
UNION LA-OUACHITA LA-
444 PM CDT WED JUL 13 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHERN OUACHITA AND SOUTHEASTERN UNION PARISHES...
AT 445 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 6 MILES NORTH OF
CLAIBORNE...MOVING SOUTHEAST AT 5 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
CLAIBORNE BY 520 PM CDT...
WEST MONROE...MONROE AND SWARTZ BY 530 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM HAS
PASSED.
&&
LAT...LON 3251 9190 3246 9194 3251 9223 3254 9230
3270 9234 3284 9210 3278 9204 3272 9205
3271 9204 3272 9199 3263 9190 3258 9191
3254 9189
TIME...MOT...LOC 2145Z 333DEG 6KT 3262 9217
$$094
WWUS54 KSHV 132157
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
ISSUED BY NATIONAL WEATHER SERVICE FORT WORTH TX
457 PM CDT WED JUL 13 2011
LAC111-132207-
/O.CAN.KSHV.SV.W.0302.000000T0000Z-110713T2230Z/
UNION LA-
457 PM CDT WED JUL 13 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN UNION PARISH IS
CANCELLED...
LAT...LON 3246 9194 3251 9223 3254 9230 3259 9231
3260 9222 3267 9213 3269 9213 3269 9209
3273 9206 3271 9204 3272 9199 3263 9190
3258 9191 3254 9189 3253 9189
TIME...MOT...LOC 2157Z 333DEG 6KT 3255 9211
$$
LAC073-132230-
/O.CON.KSHV.SV.W.0302.000000T0000Z-110713T2230Z/
OUACHITA LA-
457 PM CDT WED JUL 13 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHERN OUACHITA PARISH...
AT 457 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 3 MILES NORTHWEST OF
MONROE...MOVING SOUTHEAST AT 5 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
WEST MONROE BY 505 PM CDT...
SWARTZ BY 515 PM CDT...
MONROE BY 525 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM HAS
PASSED.
&&
LAT...LON 3246 9194 3251 9223 3254 9230 3259 9231
3260 9222 3267 9213 3269 9213 3269 9209
3273 9206 3271 9204 3272 9199 3263 9190
3258 9191 3254 9189 3253 9189
TIME...MOT...LOC 2157Z 333DEG 6KT 3255 9211
$$871
WWUS54 KSHV 132209
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
ISSUED BY NATIONAL WEATHER SERVICE FORT WORTH TX
509 PM CDT WED JUL 13 2011
LAC073-132219-
/O.CAN.KSHV.SV.W.0302.000000T0000Z-110713T2230Z/
OUACHITA LA-
509 PM CDT WED JUL 13 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN OUACHITA PARISH IS
CANCELLED...
AT 509 PM CDT THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING
WEAKENED AND WAS NO LONGER SEVERE...THUS THE WARNING HAS BEEN
CANCELLED.
LAT...LON 3246 9194 3251 9223 3254 9230 3259 9231
3260 9222 3267 9213 3269 9213 3269 9209
3273 9206 3271 9204 3272 9199 3263 9190
3258 9191 3254 9189 3253 9189
TIME...MOT...LOC 2209Z 333DEG 6KT 3253 9210
$$What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 2:26 PM CDT, 2 hours earlier.
Area forecast discussion, Jul 13, 2:26 PM CDT, 2 hours before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
ISSUED BY NATIONAL WEATHER SERVICE FORT WORTH TX
226 PM CDT WED JUL 13 2011
.DISCUSSION...
FEW CHANGES TO THIS FORECAST PACKAGE. HAVE RAISED SLIGHTLY THE
LOW TEMPERATURES FOR THE NEXT TWO DAYS BASED ON LOWS THIS
MORNING. LOW POPS STILL REQUIRED OVER THE NEXT SEVERAL DAYS BASED
ON GUIDANCE. 06Z NAM BROUGHT A TROPICAL WAVE INTO LOUISIANA
SATURDAY...BUT 12Z RUN DOES NOT SHOW SUCH A WELL DEFINED SYSTEM
AND DOES NOT CARRY THE WIDESPREAD POPS OF THE PREVIOUS RUN.
HAVE EXTENDED HEAT ADVISORY ANOTHER 24 HOURS...THROUGH THURSDAY
AFTERNOON. NIGHT TIME LOWS WILL REMAIN IN THE 80S MANY
AREAS...AND AFTERNOON HEAT INDICES WILL REACH ABOVE 105 AS WELL.
AS UPPER RIDGE MOVES NORTH A BIT OVER THE WEEKEND...TO LIE
CENTERED OVER KS/MO SATURDAY EVENING...AFTERNOON HIGHS MAY DROP A
FEW DEGREES AND GIVE SOME SLIGHT RELIEF. FWD-84
&&
.AVIATION...
CONCERNS...AFTERNOON/EVENING CONVECTION. OTHERWISE...VFR.
CONVECTION NEAR MLU/ELD. AT MLU...REDUCED CATEGORICAL -TSRA AFTER
00Z TO LATE AFTERNOON TEMPO.
CU FIELD HAS BEEN SLOW TO DEVELOP NEAR EAST TEXAS TAF SITES. CU IS
RATHER FLAT. WILL CONTINUE TO MONITOR...BUT MAY NEED TO REMOVE CB.
FWD-25
&&
.PRELIMINARY POINT TEMPS/POPS...
SHV 81 98 81 97 79 / 20 30 20 30 20
MLU 80 98 80 97 78 / 20 40 20 40 20
DEQ 78 97 78 96 75 / 30 20 20 30 20
TXK 80 98 80 97 78 / 30 30 20 30 20
ELD 78 96 78 97 77 / 30 40 20 30 20
TYR 80 100 80 99 79 / 20 20 20 30 20
GGG 80 99 80 98 79 / 20 20 20 30 20
LFK 79 99 79 98 78 / 20 20 20 30 20
&&
.SHV WATCHES/WARNINGS/ADVISORIES...
AR...HEAT ADVISORY UNTIL 8 PM CDT THURSDAY FOR THE FOLLOWING
ZONES: ARZ050-051-059>061-070>073.
LA...HEAT ADVISORY UNTIL 8 PM CDT THURSDAY FOR THE FOLLOWING
ZONES: LAZ001>006-010>014-017>022.
OK...HEAT ADVISORY UNTIL 8 PM CDT THURSDAY FOR THE FOLLOWING
ZONES: OKZ077.
TX...HEAT ADVISORY UNTIL 8 PM CDT THURSDAY FOR THE FOLLOWING
ZONES: TXZ096-097-108>112-124>126-136>138-149>153-165>167.
&&
99/99/99Hazardous weather outlook, Jul 13, 11:53 AM CDT, 4 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE SHREVEPORT LA ISSUED BY NATIONAL WEATHER SERVICE FORT WORTH TX 1153 AM CDT WED JUL 13 2011 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-141700- SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE- COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN- UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA- NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE- FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG- HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA- SAN AUGUSTINE-SABINE TX- 1153 AM CDT WED JUL 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA... NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... HIGH TEMPERATURES NEAR OR ABOVE 100 DEGREES WILL COMBINE WITH ELEVATED HUMIDITY LEVELS TO PRODUCE HEAT INDEX VALUES OF 105 TO 110 DEGREES. THEREFORE...A HEAT ADVISORY IS IN EFFECT THROUGH THIS EVENING...WHICH MEANS THERE IS AN INCREASED CHANCE FOR HEAT RELATED INJURIES. IN ADDITION...ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND EVENING ACROSS MOST OF THE REGION. ANY STORMS THAT DEVELOP WILL HAVE THE POTENTIAL TO PRODUCE STRONG GUSTY WINDS...BRIEF HEAVY RAINFALL...AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... THUNDERSTORM CHANCES WILL CONTINUE INTO THE WEEKEND AND THROUGH EARLY NEXT WEEK...AS A SERIES OF DISTURBANCES MOVE OVER THE FOUR STATE REGION. ANY STORMS THAT DEVELOP WILL BE CAPABLE OF PRODUCING FREQUENT LIGHTNING... HEAVY RAINFALL...AND STRONG GUSTY WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
In the hours before
Special weather statement, Jul 13, 3:52 PM CDT, 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
ISSUED BY NATIONAL WEATHER SERVICE FORT WORTH TX
352 PM CDT WED JUL 13 2011
LAZ006-014-132130-
UNION LA-OUACHITA LA-
352 PM CDT WED JUL 13 2011
...SIGNIFICANT WEATHER ADVISORY FOR...
NORTHERN OUACHITA PARISH
SOUTHEASTERN UNION PARISH
AT 353 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 12 MILES NORTH OF CLAIBORNE...STATIONARY.
CITIES IN THE PATH OF THIS STORM INCLUDE CLAIBORNE...STERLINGTON AND
SWARTZ.
PEA-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS
STORM.
LAT...LON 3255 9194 3253 9227 3285 9235 3297 9208
3294 9205 3286 9207 3280 9204 3274 9204
3273 9206 3271 9204 3272 9197 3267 9194
3267 9190 3262 9191
TIME...MOT...LOC 2053Z 001DEG 0KT 3271 9215The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 3:52 PM CDT | Special Weather Statement | SHV | Union | 38 min |
| Jul 13, 5:10 PM CDT | Special Weather Statement | SHV | Union | 35 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2011Every severe thunderstorm warning in 2011
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.