Alert archive / Louisiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 46, NWS Shreveport, LA

April 4, 20114 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 4, 2011, 12:17 PM CDT for 4 parishes in 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: Apr 4, 2011, 12:17 PM CDT (17:17 UTC)
Expired: Apr 4, 2011, 1:00 PM CDT
In force: 43 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Grant Parish, LA, Jackson Parish, LA, Natchitoches Parish, LA, Winn Parish, LA

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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 4, 7:44 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 5.3 hours before the alert went out and 124 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: 1653 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

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

039 
WUUS54 KSHV 041717
SVRSHV
LAC043-049-069-127-041800-
/O.NEW.KSHV.SV.W.0046.110404T1717Z-110404T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1217 PM CDT MON APR 4 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GRANT PARISH IN NORTH CENTRAL LOUISIANA...
  SOUTHEASTERN JACKSON PARISH IN NORTH CENTRAL LOUISIANA...
  WINN PARISH IN NORTH CENTRAL LOUISIANA...
  THIS INCLUDES THE CITY OF WINNFIELD...
  EASTERN NATCHITOCHES PARISH IN NORTHWEST LOUISIANA...
  THIS INCLUDES THE CITY OF NATCHITOCHES...

* UNTIL 100 PM CDT

* AT 1213 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 7 MILES
  WEST OF MONTGOMERY...OR 7 MILES SOUTHEAST OF NATCHITOCHES...AND
  MOVING NORTHEAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CLEAR
  LAKE...ATLANTA...WILLIANA...CALVIN...JOYCE...GEORGETOWN...DODSON...
  ROCHELLE...HUDSON...SIKES AND CHATHAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3172 9235 3147 9322 3172 9315 3244 9247
      3221 9232
TIME...MOT...LOC 1717Z 231DEG 52KT 3174 9293

$$

04

1 follow-up statement

424 
WWUS54 KSHV 041752
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1252 PM CDT MON APR 4 2011

LAC043-049-069-127-041801-
/O.EXP.KSHV.SV.W.0046.000000T0000Z-110404T1800Z/
JACKSON LA-NATCHITOCHES LA-WINN LA-GRANT LA-
1252 PM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR GRANT...WINN...NATCHITOCHES
AND JACKSON PARISHES HAS EXPIRED...

STORMS HAVE DIMINISHED IN INTENSITY WITHING THE WARNED AREA.  SMALL 
HAIL UP TO MARBLE SIZE IS STILL POSSIBLE HOWEVER.

LAT...LON 3172 9235 3147 9322 3172 9315 3244 9247
      3221 9232
TIME...MOT...LOC 1751Z 231DEG 52KT 3201 9244

$$

04

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 4, 11:37 AM CDT, 40 minutes earlier.

Area forecast discussion, Apr 4, 11:37 AM CDT, 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
1137 AM CDT MON APR 4 2011

.DISCUSSION...
THE COLD FRONT CONTINUES A STRONG EWD PUSH ACROSS SW AR/E TX LATE
THIS MORNING...WITH A LINE OF CONVECTION TRANSLATING E ACROSS AN
INCREASINGLY UNSTABLE AIR MASS AHEAD OF THE FRONT ACROSS NCNTRL
LA. IN FACT..SBCAPES HAVE INCREASE TO NEAR 2000 J/KG AHEAD OF THE
FRONT...WITH THE UPPER TROUGH AXIS NOW BEGINNING TO BECOME
NEUTRALLY TILTED ACROSS THE CNTRL PLAINS S INTO CNTRL OK/TX.
THUS...CONVECTION WILL CONTINUE TO INCREASING TREND...IN COVERAGE
AND INTENSITY...ESPECIALLY OVER THE SE ZONES THAT HAVE YET TO BE
AFFECTED BY THE CURRENT CONVECTION/ATTENDANT GUST FRONTS.

MEANWHILE...STRONG NW WINDS BEHIND THE FRONT HAVE BEEN ONGOING
THIS MORNING ACROSS CNTRL OK/NCNTRL TX...WITH FREQUENT GUSTS TO
25-35+ KTS. THUS...THE LAKE WIND ADVISORY WILL CONTINUE THROUGH
00Z AREAWIDE...BEFORE THEY BEGIN TO SUBSIDE WITH A RELAXING
PRESSURE GRADIENT AHEAD OF BUILDING HIGH PRESSURE.

THE ZONE UPDATE THIS MORNING ENCOMPASSES LOWERING TEMPS
SIGNIFICANTLY BEHIND THE FRONT...WITH READING HAVING FALLEN INTO
THE MID 50S. NOT MUCH RECOVERY IS EXPECTED THIS AFTERNOON AS THE
STRONG NW WINDS AND POSTFRONTAL CLOUD COVER WILL LINGER...WITH
TEMPS STRUGGLING TO REACH THE LOWER 60S. HAVE ALSO EXTENDED SVR
WATCH 90 TO ENCOMPASS THE REMAINDER OF OUR ERN NCNTRL LA PARISHES
THROUGH 20Z...WHILE CANCELLING THE WATCH FATHER W BEHIND THE
FRONT.

UPDATE ALREADY OUT...GRIDS WILL BE AVAILABLE SHORTLY.

15

&&

.AVIATION...
A LINE OF STRONG TSTMS HAVE WEAKENED SLIGHTLY DURING THE PAST HOUR...
AND EASTWARD MOVEMENT OF THIS LINE HAS ALSO SLOWED DOWN. SMALL
HAIL...FREQUENT LIGHTNING STRIKES...GUSTY WINDS TO NEAR 40 MPH...AND
VERY HEAVY RAIN IS STILL EXPECTED WITH STORMS. THIS LINE COULD REINTENSIFY
WITH MORE SVR STORMS POSSIBLE OVER EAST TX LAKES AND PARTS OF NORTH
LA...AS AFTN HEATING AIDS THE DELAYED ONSET OF STORM ARRIVAL...INCLUDING
THE MLU TERMINAL. CURRENT STORM ACTIVITY CAN BE EXPECTED TO MOVE EAST
OF THE ELD...SHV...AND LFK TERMINALS BTWN 17-18Z. CONVECTION HAS
CEASED AT TXK...GGG...AND TYR...WITH NW WINDS 15 TO 25 KTS...GUSTS OVER
35 KTS PSBL...FOR MUCH OF AFTN. SKIES BECMG MOSTLY VFR SKC ABOUT 2
HOURS FOLLOWING NW WSHFT...BUT WITH SOME PATCHY MID AND UPPER LVL
CLOUDS. NW WINDS DIMINISHING OVERNIGHT...BUT LOWERING DEWPOINTS IN
COLDER AIR SHOULD PRECLUDE FOG DEVELOPMENT...DESPITE SKC SKIES AND
WET GROUND OVERNIGHT. /VII/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  70  41  70  47  77 /  80  10   0   0   0
MLU  79  40  69  44  77 /  80  20   0   0   0
DEQ  66  33  69  42  75 /  10  10   0   0   0
TXK  68  37  70  45  76 /  20  10   0   0   0
ELD  71  38  70  44  77 /  80  10   0   0   0
TYR  68  40  72  49  77 /  10  10   0   0   0
GGG  69  40  72  47  77 /  20  10   0   0   0
LFK  71  41  75  46  79 /  80  10   0   0   0

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...LAKE WIND ADVISORY UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING
     ZONES: ARZ050-051-059>061-070>073.

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

OK...LAKE WIND ADVISORY UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING
     ZONES: OKZ077.

TX...LAKE WIND ADVISORY UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING
     ZONES: TXZ096-097-108>112-124>126-136>138-149>153-165>167.

&&

15/07

Hazardous weather outlook, Apr 4, 11:51 AM CDT, 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1151 AM CDT MON APR 4 2011

ARZ050-051-059>061-070-071-OKZ077-TXZ096-097-108>112-124>126-
136>138-149-150-051200-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
MCCURTAIN-RED RIVER-BOWIE-FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-
UPSHUR-MARION-SMITH-GREGG-HARRISON-CHEROKEE-RUSK-
1151 AM CDT MON APR 4 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
ARKANSAS...SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

STRONG NORTHWEST WINDS OF 15 TO 25 MPH...WITH GUSTS UP TO
35 MPH...CAN BE EXPECTED THIS AFTERNOON ACROSS SOUTHEAST
OKLAHOMA...SOUTHWEST ARKANSAS...AND NORTHEAST TEXAS...BEHIND A
STRONG COLD FRONT WHICH PASSED THROUGH THE AREA EARLIER THIS
MORNING. THESE WINDS WILL BEGIN TO DIMINISH THIS EVENING AS THE
PRESSURE GRADIENT RELAXES AHEAD OF AN AREA OF HIGH PRESSURE AS IT
BUILDS SOUTH INTO TEXAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL BE
POSSIBLE THURSDAY AND DURING NEXT WEEKEND...AS A SERIES OF UPPER
LEVEL DISTURBANCES MOVE ACROSS THE REGION. HOWEVER...NO HAZARDOUS
WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON OR TONIGHT.

ARZ072-073-LAZ001>006-010>014-017>022-TXZ151>153-165>167-051200-
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-PANOLA-NACOGDOCHES-
SHELBY-ANGELINA-SAN AUGUSTINE-SABINE TX-
1151 AM CDT MON APR 4 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO DEVELOP AND SPREAD
EAST NORTHEAST THIS AFTERNOON ACROSS DEEP EAST TEXAS...NORTH
LOUISIANA...AND SOUTHCENTRAL ARKANSAS...ALONG AND AHEAD OF A
STRONG COLD FRONT AND ASSOCIATED UPPER LEVEL STORM SYSTEM. STRONG
INSTABILITY AND DYNAMICS AHEAD OF THE FRONT WILL CONTRIBUTE TO
THE SEVERE WEATHER THREAT THIS AFTERNOON...WITH DAMAGING
WINDS...LARGE HAIL...AND ISOLATED TORNADOES POSSIBLE. GIVEN THE
RICH MOISTURE FEED FROM THE GULF OF MEXICO AHEAD OF THE
FRONT...LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE FROM THE
STRONGER STORMS...AND WILL BE CAPABLE OF PRODUCING LOCALIZED
FLOODING OF LOW LYING...POOR DRAINAGE AREAS. THE SEVERE WEATHER
THREAT WILL DIMINISH FROM WEST TO EAST THIS AFTERNOON WITH THE
PASSAGE OF THE COLD FRONT.

IN ADDITION...STRONG NORTHWEST WINDS OF 15 TO 25 MPH...WITH GUSTS
TO 30 MPH...WILL FOLLOW THE FRONTAL PASSAGE THIS AFTERNOON. THESE
WINDS WILL BEGIN TO RELAX THIS EVENING AS HIGH PRESSURE BUILDS
SOUTH INTO TEXAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL BE
POSSIBLE THURSDAY AND DURING NEXT WEEKEND...AS A SERIES OF UPPER
LEVEL DISTURBANCES MOVE ACROSS THE REGION. HOWEVER...NO HAZARDOUS
WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND AMATEUR
RADIO OPERATORS...WILL BE NEEDED THIS AFTERNOON ACROSS PORTIONS OF
DEEP EAST TEXAS...ALL OF NORTH LOUISIANA...AND SOUTHCENTRAL ARKANSAS.

15

In the hours before

Local storm report, Apr 4, 11:23 AM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1123 AM CDT MON APR 04 2011

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

1030 AM     TSTM WND DMG     10 NE HOMER             32.90N 92.94W
04/04/2011                   CLAIBORNE          LA   TRAINED SPOTTER

            TREE DOWN ACROSS CUPPS CROSSING RD.

&&

03

Local storm report, Apr 4, 11:28 AM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1128 AM CDT MON APR 04 2011

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

0848 AM     TSTM WND DMG     PRESCOTT                33.80N 93.39W
04/04/2011                   NEVADA             AR   EMERGENCY MNGR

            DAMAGE TO RESIDENCE AND SEVERAL CHICKEN HOUSES OFF CR 23.
            NUMEROUS COUNTY ROADS BLOCKED DUE TO DOWNED TREES.

0936 AM     TSTM WND DMG     MAGNOLIA                33.27N 93.24W
04/04/2011                   COLUMBIA           AR   EMERGENCY MNGR

            DAMAGE TO MOBILE HOME AND ALSO RESIDENCE ALONG WITH
            NUMEROUS TREES AND POWER LINES DOWN AT 600 BLOCK OF CR
            148 NEAR MAGNOLIA. ROADWAY BLOCKED DUE TO TREES.

&&

LFRANTZ

Local storm report, Apr 4, 11:30 AM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1130 AM CDT MON APR 04 2011

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

0812 AM     TSTM WND DMG     ASHDOWN                 33.67N 94.13W
04/04/2011                   LITTLE RIVER       AR   EMERGENCY MNGR

            SEVERAL TREES AND POWER LINES DOWN IN EASTERN PART OF
            ASHDOWN. ONE FAMILY TRAPPED IN RESIDENCE DUE TO DOWNED
            TREES ON HOME. NATURAL GAS PIPE RUPTURED DUE TO TREES
            BEING UPROOTED OFF OF HWY 32 WEST. HWY 32 WEST AND
            NUMEROUS CITY STREETS BLOCKED.

&&

LFRANTZ

Local storm report, Apr 4, 11:41 AM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1141 AM CDT MON APR 04 2011

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

0819 AM     LIGHTNING        2 E LIBERTY CITY        32.45N 94.91W
04/04/2011                   GREGG              TX   NEWSPAPER

            3 OILFIELD SERVICE TANKS EXPLODED FOLLOWING A LIGHTNING
            STRIKE. TANKS LOCATED ALONG FM 1252 EAST OF LIBERTY CITY.
            ONE TANK WAS STRUCK WHICH CAUSED THE OTHER TWO TO BLOW.

&&

04

Local storm report, Apr 4, 12:07 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1207 PM CDT MON APR 04 2011

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

0848 AM     TSTM WND DMG     2 S PRESCOTT            33.77N 93.39W
04/04/2011                   NEVADA             AR   EMERGENCY MNGR

            FIVE HOMES DAMAGED, 3 OF THESE DUE TO DOWNED TREES, SOUTH
            OF PRESCOTT NEAR EMMETT CLOSE TO HWY 53 AND HWY 24.

0848 AM     TSTM WND DMG     3 N PRESCOTT            33.84N 93.39W
04/04/2011                   NEVADA             AR   EMERGENCY MNGR

            POWER LINES, TREES DOWN, LARGE OAK TREES DOWN NORTH
            PORTION OF NEVADA COUNTY

&&

LFRANTZ

Special weather statement, Apr 4, 12:07 PM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1207 PM CDT MON APR 4 2011

LAZ013-017>020-041745-
GRANT-JACKSON-NATCHITOCHES-SABINE-WINN-
1207 PM CDT MON APR 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 1245 PM CDT...FOR THE FOLLOWING
PARISHES...

IN NORTH CENTRAL LOUISIANA...
     JACKSON...WINN AND GRANT...
IN NORTHWEST LOUISIANA...
     NATCHITOCHES AND SABINE...

INCLUDING THE FOLLOWING LOCATIONS...
     MONTGOMERY...NATCHITOCHES AND WINNFIELD...

AT 1202 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM 7 MILES SOUTH OF NATCHITOCHES...
MOVING NORTHEAST AT 65 MPH.

DIME SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS
STORM. SMALL HAIL HAS ALREADY BEEN REPORTED IN NATCHITOCHES LA

04

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 8:29 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	61 min
Apr 4, 9:21 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	54 min
Apr 4, 9:33 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	57 min
Apr 4, 9:46 AM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Webster	59 min
Apr 4, 10:10 AM CDT	Areal Flood Advisory	SHV	Bossier, Caddo, Webster	2 hr
Apr 4, 1:24 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Jackson, LaSalle, Natchitoches, Winn	51 min
Apr 4, 2:11 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, Jackson, LaSalle, Winn	49 min
Apr 4, 2:39 PM CDT	Tornado Warning	SHV	Caldwell, Grant, LaSalle, Winn	36 min
Apr 4, 2:49 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Ouachita	26 min

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; the sounding from the Mesonet's radiosonde archive.