Alert archive / Louisiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 174, NWS Shreveport, LA

April 26, 20116 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 26, 2011, 10:46 PM CDT for 6 parishes in Louisiana. It was in force for 44 min. 3 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: Apr 26, 2011, 10:46 PM CDT (03:46 UTC)
Expired: Apr 26, 2011, 11:30 PM CDT
In force: 44 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Bienville Parish, LA, Claiborne Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Red River Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 83 km from the middle of the area, began a volume at 03:49 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
Apr 26, 10:55 PM CDT	TSTM WND DMG	Hall Summit, LA	NUMEROUS TREES AND POWER LINES DOWN NEAR HALL SUMMIT. POSSIBLE TORNADO.
Apr 26, 10:55 PM CDT	HAIL 1.75	Hall Summit, LA	GOLF BALL SIZE HAIL IN HALL SUMMIT.
Apr 26, 10:55 PM CDT	TORNADO	Hall Summit, LA	EF-1 TORNADO PATH LENGTH 3.5 MILES...WIDTH 125 MILES. A COUPLE BARNS WERE DESTROYED WEST OF TOWN NORTH OF STATE ROUTE 514. THE TORNADO CONTINUED EAST SNAPPING AND UPROOTING TREES ALONG 514 WITH SEVERAL HOMES IN TOWN SUSTAINING MINOR TO MODERATE ROOF DAMAGE. TH

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 9 minutes after it went out.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 26, 1:44 PM CDT	Tornado Watch PDS	SPC	10 hr
Apr 26, 9:33 PM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 3.8 hours before the alert went out and 75 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: 2270 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 281 m²/s²
0-3 km storm-relative helicity: 428 m²/s²
Significant tornado parameter: 5.6
Supercell composite: 23.5

Open this sounding in Storm Lab

The text

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

488 
WUUS54 KSHV 270346
SVRSHV
LAC013-027-049-061-081-111-270430-
/O.NEW.KSHV.SV.W.0174.110427T0346Z-110427T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1046 PM CDT TUE APR 26 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN JACKSON PARISH IN NORTH CENTRAL LOUISIANA...
  LINCOLN PARISH IN NORTH CENTRAL LOUISIANA...
  THIS INCLUDES THE CITIES OF...RUSTON...GRAMBLING...
  WESTERN UNION PARISH IN NORTH CENTRAL LOUISIANA...
  BIENVILLE PARISH IN NORTHWEST LOUISIANA...
  EASTERN CLAIBORNE PARISH IN NORTHWEST LOUISIANA...
  NORTHERN RED RIVER PARISH IN NORTHWEST LOUISIANA...

* UNTIL 1130 PM CDT

* AT 1044 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS   
  WERE LOCATED ALONG A LINE FROM EAST OF HAYNESVILLE...TO ATHENS TO 
  NEAR RINGGOLD AND HALL SUMMIT. THIS LINE WAS MOVING TO THE EAST
  NEAR 50 MPH. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 3269 9230 3258 9238 3258 9241 3252 9242
      3236 9258 3216 9287 3216 9352 3221 9359
      3225 9354 3224 9342 3234 9341 3242 9329
      3241 9323 3246 9322 3246 9315 3251 9316
      3269 9306 3302 9298 3300 9222
TIME...MOT...LOC 0344Z 266DEG 45KT 3296 9287 3270 9292
          3250 9304 3237 9325 3223 9343

$$

13

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 Apr 26, 10:18 PM CDT, 28 minutes earlier.

Area forecast discussion, Apr 26, 10:18 PM CDT, 28 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
1018 PM CDT TUE APR 26 2011

.DISCUSSION...
TORNADO WATCHES HAVE BEEN EXTENDED UNTIL 5 AM FOR THE SOUTHERN
HALF OF THE FOUR STATE AREA...MAINLY OVER EAST TEXAS...AND NORTH
LOUISIANA...AND THE SOUTH TIER OF COUNTIES OVER ARKANSAS. WILL
SEND AN UPDATE TO THE ZONES FOR THESE TWO NEW TORNADO WATCHES.
WILL ALSO SEND AN UPDATE TO THE FLASH FLOOD WATCH AND TO THE LAKE
WIND ADVISORY. WILL NOT MAKE ANY CHANGES TO POPS AND MIN
TEMPERATURES FOR TONIGHT.

WAVER VAPOR SATELLITE INDICATES THAT THE MAIN SHORT WAVE IS STILL
TO OUR WEST OVER NORTHWEST TEXAS...SO EXPECT THE STRONG TO SEVERE
THUNDERSTORMS TO CONTINUE THROUGH MOST OF THE NIGHT. THE STORMS
WILL TAPER OFF BY SUNRISE OR SO.

&&

.AVIATION...
IFR CIGS UNDER DOWNPOURS...OTHERWISE CIGS ARE MVFR/VFR. PREVAILING
WINDS REMAIN SOUTH WINDS 10 TO 20 KNOTS PERSISTING TO ABOUT 09Z AT
MOST LOCATIONS. VARYING AND QUITE GUSTY IN AND NEAR HEAVY RAIN.
SCATTERED LARGE THUNDERSTORMS PRODUCING DAMAGING WINDS...TORNADOES
AND TURBULENCE...ALONG WITH HEAVY RAINFALL AND HAIL. THUNDERSTORM
ACTIVITY TO DIMINISH AFTER 09-12Z E TO W WEDNESDAY WITH MVFR/IFR
CIGS PERSISTING TO AROUND 15Z OR SO. THEN...THE DRYLINE AND W TO NW
WINDS EXPECTED 15-18Z E TO W WITH VFR CIGS.
/24/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  69  79  53  79  53 /  60  30  10   0   0
MLU  70  81  52  75  50 /  60  40  10   0   0
DEQ  56  70  43  76  46 /  80  50  10   0   0
TXK  66  74  49  77  52 /  80  40  10   0   0
ELD  66  75  47  77  48 /  80  50  10   0   0
TYR  65  75  52  78  54 /  60  10  10   0   0
GGG  67  79  51  78  52 /  60  20  10   0   0
LFK  69  82  53  82  51 /  40  10  10   0   0

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...FLASH FLOOD WATCH UNTIL 7 AM CDT WEDNESDAY FOR THE FOLLOWING
     ZONES: ARZ050-051-059>061-070>073.

LA...LAKE WIND ADVISORY UNTIL 7 AM CDT WEDNESDAY FOR THE FOLLOWING
     ZONES: LAZ001>006-010>014-017>022.

OK...FLASH FLOOD WATCH UNTIL 7 AM CDT WEDNESDAY FOR THE FOLLOWING
     ZONES: OKZ077.

TX...LAKE WIND ADVISORY UNTIL 7 AM CDT WEDNESDAY FOR THE FOLLOWING
     ZONES: TXZ124>126-136>138-149>153-165>167.

     FLASH FLOOD WATCH UNTIL 7 AM CDT WEDNESDAY FOR THE FOLLOWING
     ZONES: TXZ096-097-108>112.

&&

03/24

Hazardous weather outlook, Apr 26, 12:00 PM CDT, 10 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1200 PM CDT TUE APR 26 2011

ARZ050-051-059>061-070>073-LAZ001>006-010>014-OKZ077-TXZ096-097-
108>112-124>126-136>138-149>151-271100-
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-MCCURTAIN-
BOWIE-FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-
GREGG-HARRISON-CHEROKEE-RUSK-PANOLA-
1200 PM CDT TUE APR 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT...

...FLASH FLOOD WATCH IN EFFECT FOR THE NORTHERN THIRD OF NORTHEAST
TEXAS...MCCURTAIN COUNTY IN SOUTHEAST OKLAHOMA AS WELL AS ALL OF
SOUTHWEST AND SOUTH CENTRAL ARKANSAS THROUGH 7 AM WEDNESDAY...

THE POTENTIAL EXIST FOR A VIOLENT OUTBREAK OF TORNADOES LATE THIS
AFTERNOON INTO THE OVERNIGHT HOURS ALONG AND NORTH OF THE
INTERSTATE 20 CORRIDOR OF NORTHEAST TEXAS AND NORTHERN
LOUISIANA...INCLUDING SOUTHEAST OKLAHOMA AND ALL OF SOUTHERN
ARKANSAS.

A STRONG UPPER LEVEL TROUGH IN COMBINATION WITH A VERY UNSTABLE AND
HIGHLY SHEARED ENVIRONMENT WILL LIKELY RESULT IN THE FORMATION OF
SUPERCELLS ACROSS THE REGION WITH A VIOLENT AND POTENTIAL DEADLY
TORNADO OUTBREAK EXPECTED. VERY LARGE HAIL AND DAMAGING WIND WILL
ALSO ACCOMPANY THE CONVECTION LATE THIS AFTERNOON THROUGH THE
OVERNIGHT HOURS.

TWO TO FOUR INCHES OF RAIN WITH ISOLATED HIGHER AMOUNTS CAN BE
EXPECTED ACROSS SOUTHEAST OKLAHOMA...SOUTHWEST ARKANSAS AND EXTREME
NORTHEAST TEXAS TONIGHT...WHICH WILL RESULT IN FLASH FLOODING
CONCERNS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...STRONG TO
SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE ACROSS THE REGION THIS
WEEKEND WITH THE APPROACH OF ANOTHER UPPER LEVEL STORM SYSTEM.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL BE NEEDED LATER THIS AFTERNOON...BUT
ESPECIALLY THIS EVENING AND THROUGH THE OVERNIGHT HOURS FOR THIS
SIGNIFICANT SEVERE THUNDERSTORM THREAT.

LAZ017>022-TXZ152-153-165>167-271100-
SABINE LA-NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-NACOGDOCHES-
SHELBY-ANGELINA-SAN AUGUSTINE-SABINE TX-
1200 PM CDT TUE APR 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
LOUISIANA...NORTHWEST LOUISIANA AND EAST TEXAS.

.DAY ONE...TODAY AND TONIGHT...
SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN BE POSSIBLE LATE THIS
AFTERNOON THROUGH THE OVERNIGHT HOURS ACROSS THE REGION. WITH A VERY
UNSTABLE ENVIRONMENT IN PLACE...STRONG TO SEVERE THUNDERSTORMS ARE
POSSIBLE...SOME OF WHICH COULD PRODUCE TORNADOES WITH HAIL AND
DAMAGING STRAIGHT LINE WINDS. THIS THREAT WILL INCREASE AS WE
TRANSITION INTO THE EVENING HOURS TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...STRONG TO
SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE ACROSS THE REGION THIS
WEEKEND WITH THE APPROACH OF ANOTHER UPPER LEVEL STORM SYSTEM.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED AS EARLY AS THIS AFTERNOON BUT
ESPECIALLY THIS EVENING AND THROUGH THE OVERNIGHT HOURS FOR THE
POTENTIAL OUTBREAK OF SEVERE THUNDERSTORMS.

In the hours before

Local storm report, Apr 26, 9:57 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
957 PM CDT TUE APR 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0837 PM     TSTM WND DMG     8 NW RINGGOLD           32.41N 93.38W
04/26/2011                   BIENVILLE          LA   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN ONTO CARS NEAR LAKE BISTINEAU.

0845 PM     TSTM WND DMG     RINGGOLD                32.33N 93.28W
04/26/2011                   BIENVILLE          LA   LAW ENFORCEMENT

            NUMEROUS TREES DOWN ON HOMES AND CARS.

0852 PM     TSTM WND DMG     JAMESTOWN               32.34N 93.21W
04/26/2011                   BIENVILLE          LA   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN IN JAMESTOWN.

0911 PM     HAIL             1 N LUCKY               32.26N 93.01W
04/26/2011  E1.75 INCH       BIENVILLE          LA   LAW ENFORCEMENT

            GOLF BALL SIZE HAIL NEAR THE SALINE COMMUNITY.

&&

15

Local storm report, Apr 26, 9:59 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
959 PM CDT TUE APR 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0820 PM     HAIL             4 SSE SHREVEPORT        32.42N 93.77W
04/26/2011  E1.50 INCH       CADDO              LA   PUBLIC

            PING PONG BALL SIZE HAIL OFF OF NORRIS FERRY ROAD
            EXTENSION

&&

15

Local storm report, Apr 26, 10:09 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1009 PM CDT TUE APR 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0808 PM     HAIL             STONEWALL               32.26N 93.82W
04/26/2011  E1.75 INCH       DE SOTO            LA   PUBLIC

            HAIL REPORTED JUST SOUTH OF STONEWALL.

&&

MBERRY

Local storm report, Apr 26, 10:11 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1011 PM CDT TUE APR 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0953 PM     TSTM WND DMG     5 SE EL DORADO          33.17N 92.60W
04/26/2011                   UNION              AR   LAW ENFORCEMENT

            NUMEROUS TREES DOWN ACROSS HIGHWAY 82 SOUTHEAST OF EL
            DORADO. POSSIBLE TORNADO.

&&

15

Local storm report, Apr 26, 10:25 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1025 PM CDT TUE APR 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1024 PM     HAIL             5 SE STONEWALL          32.21N 93.76W
04/26/2011  E1.75 INCH       DE SOTO            LA   AMATEUR RADIO

            GOLFBALL HAIL FALLING AT FRIERSON ROAD AND I49

&&

04

Local storm report, Apr 26, 10:38 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1038 PM CDT TUE APR 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1030 PM     HAIL             4 SW CHENIERE           32.46N 92.33W
04/26/2011  E1.00 INCH       OUACHITA           LA   TRAINED SPOTTER

            QUARTER SIZE HAIL ON NEW NATCHITOCHES RD AT HIGHWAY 546.

&&

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 7:10 PM CDT	Tornado Warning	SHV	Bossier, Caddo	50 min
Apr 26, 7:18 PM CDT	Severe Thunderstorm Warning	SHV	Caddo, De Soto	57 min
Apr 26, 7:22 PM CDT	Tornado Warning	SHV	Bossier, Caddo	23 min
Apr 26, 7:41 PM CDT	Tornado Warning	SHV	Caddo, De Soto	49 min
Apr 26, 7:44 PM CDT	Tornado Warning	SHV	Bossier, Webster	46 min
Apr 26, 8:25 PM CDT	Tornado Warning	SHV	Bienville, Bossier, Caddo, De Soto, Red River, Webster	50 min
Apr 26, 8:30 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, De Soto, Natchitoches, Red River	45 min
Apr 26, 8:46 PM CDT	Tornado Warning	SHV	Bienville, Claiborne, Webster	32 min
Apr 26, 8:52 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Webster	38 min
Apr 26, 9:05 PM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln	25 min
Apr 26, 9:10 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson	50 min
Apr 26, 9:16 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Union	44 min
Apr 26, 9:25 PM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln	35 min
Apr 26, 9:30 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Union	45 min
Apr 26, 9:41 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	49 min
Apr 26, 9:49 PM CDT	Tornado Warning	SHV	Jackson, Lincoln, Ouachita, Union	41 min
Apr 26, 9:56 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	49 min
Apr 26, 9:59 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Ouachita	46 min
Apr 26, 10:02 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln, Webster	43 min
Apr 26, 10:14 PM CDT	Severe Thunderstorm Warning	SHV	Union	46 min
Apr 26, 10:14 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Webster	46 min
Apr 26, 10:18 PM CDT	Tornado Warning	SHV	Jackson, Ouachita	42 min
Apr 26, 10:37 PM CDT	Tornado Warning	SHV	Ouachita	23 min
Apr 26, 10:51 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Union	54 min
Apr 26, 10:54 PM CDT	Tornado Warning	SHV	Bienville, Jackson, Natchitoches, Red River, Winn	51 min
Apr 26, 10:57 PM CDT	Tornado Warning	SHV	Claiborne, Union	45 min
Apr 26, 11:14 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Jackson, Lincoln, Ouachita, Union	61 min
Apr 26, 11:28 PM CDT	Tornado Warning	SHV	Jackson, Ouachita, Union	47 min
Apr 26, 11:31 PM CDT	Flash Flood Warning	SHV	Jackson, Lincoln, Ouachita	4 hr
Apr 26, 11:34 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	56 min
Apr 27, 12:14 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, De Soto, Jackson, Natchitoches, Ouachita and 2 more	61 min
Apr 27, 12:23 AM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	67 min
Apr 27, 12:39 AM CDT	Tornado Warning	SHV	Natchitoches, Sabine	46 min
Apr 27, 1:05 AM CDT	Severe Thunderstorm Warning	SHV	Ouachita	44 min
Apr 27, 1:05 AM CDT	Tornado Warning	SHV	Caldwell, Grant, LaSalle, Natchitoches, Winn	55 min
Apr 27, 1:16 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Grant, Jackson, LaSalle, Natchitoches and 3 more	59 min
Apr 27, 1:33 AM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Red River, Sabine	42 min
Apr 27, 1:44 AM CDT	Tornado Warning	SHV	Caldwell, LaSalle	31 min
Apr 27, 2:00 AM CDT	Tornado Warning	SHV	Sabine	47 min
Apr 27, 2:15 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Natchitoches, Winn	60 min
Apr 27, 3:27 AM CDT	Flash Flood Warning	SHV	Jackson, Ouachita	6 hr
Apr 27, 5:44 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	38 min
Apr 27, 7:30 AM CDT	Lake Wind Advisory	SHV	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more	12 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.