Alert archive / Louisiana / Tornado Warnings in 2011
Tornado Warning 60, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Apr 27, 2011, 12:39 AM CDT for Natchitoches Parish, Sabine Parish, Louisiana. It was in force for 46 min. 9 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 27, 2011, 12:39 AM CDT (05:39 UTC)
- Expired
- Apr 27, 2011, 1:25 AM CDT
- In force
- 46 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Natchitoches Parish, LA, Sabine Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 27, 12:40 AM CDT | TSTM WND DMG | 4 N Many, LA | ROOF OFF OF A HOME NORTH OF MANY AT 390 BRUMLEY ROAD. POWERLINES DOWN AT THIS LOCATION AS WELL. POSSIBLE TORNADO. |
| Apr 27, 12:42 AM CDT | TSTM WND DMG | 5 E Many, LA | POSSIBLE TORNADO. PINE TREES SNAPPED AND THROWN THROUGH ROOF OF HOUSE...WITH OTHER TREES UPROOTED. OTHER WIDESPREAD TREES DOWN AND OTHER DEBRIS NOTED NEAR ROCKY SPRINGS ROAD AND NATCHITOCHES HIGHWAY. |
| Apr 27, 12:42 AM CDT | TORNADO | 5 Ne Many, LA | AN EF1 TORNADO TOUCHED DOWN NORTHEAST OF MANY ALONG HIGHWAY 6 AND CONTINUED NORTHEAST TO JUST SOUTHWEST OF ROBELINE. NUMEROUS TREES WERE SNAPPED AND A FEW HOMES WERE DAMAGED. THE TORNADO THEN TURNED EAST ALONG ROBELINE PROVENCAL ROAD WHERE NUMEROUS TREES FELL |
| Apr 27, 12:56 AM CDT | TSTM WND DMG | 2 S Natchitoches, LA | POSSIBLE TORNADO. REPORTS OF NUMEROUS POWER POLES DOWN NEAR STATE HIGHWAY 1 AND LATERAL ROAD. |
| Apr 27, 12:56 AM CDT | TORNADO | Flora, LA | AN EF2 TORNADO TOUCHED DOWN NEAR FLORA ALONG HIGHWAY 120 AND MOVED NORTHEAST PARALLELING HIGHWAY 478 JUST SOUTH OF NATCHITOCHES. NUMEROUS TREES/POWER LINES WERE SNAPPED AND HOMES WERE DAMAGED AS THE TORNADO CROSSED HIGHWAY 1 INTO WINN PARISH. THE TORNADO INTEN |
| Apr 27, 1:00 AM CDT | TSTM WND DMG | 1 Se Natchez, LA | NUMEROUS TREES DOWN NEAR NATCHEZ. TREES DOWN THROUGH A ROOF OF A HOME ON HIGHWAY 494 JUST SOUTHEAST OF NATCHEZ. POSSIBLE TORNADO. |
| Apr 27, 1:00 AM CDT | TSTM WND DMG | Natchitoches, LA | SEVERAL TREES WERE DOWNED THROUGHOUT THE PARISH. |
| Apr 27, 1:00 AM CDT | HAIL 0.75 | Natchitoches, LA | DIME SIZE HAIL AND 40 MPH WINDS WERE MEASURED IN NATCHITOCHES. |
| Apr 27, 1:13 AM CDT | TSTM WND DMG | 9 Nw Montgomery, LA | A HOME WAS SEVERE DAMAGED NEAR NANTACHIE CREEK ON HARRISONBURG ROAD. POSSIBLE TORNADO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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, 9:33 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 5.7 hours before the alert went out and 104 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
139
WFUS54 KSHV 270539
TORSHV
LAC069-085-270645-
/O.NEW.KSHV.TO.W.0060.110427T0539Z-110427T0645Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1239 AM CDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* TORNADO WARNING FOR...
CENTRAL NATCHITOCHES PARISH IN NORTHWEST LOUISIANA...
THIS INCLUDES THE CITY OF NATCHITOCHES...
CENTRAL SABINE PARISH IN NORTHWEST LOUISIANA...
* UNTIL 145 AM CDT
* AT 1237 AM CDT...A TORNADO WAS REPORTED NEAR MANY...OR 24 MILES
WEST OF NATCHITOCHES...MOVING EAST AT 50 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MARTHAVILLE...ROBELINE...HAGEWOOD...PROVENCAL...FLORA...GRAND
ECORE...NATCHEZ...CLARENCE...BERMUDA...MELROSE AND ST. MAURICE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
&&
LAT...LON 3174 9353 3184 9295 3179 9295 3177 9297
3169 9295 3168 9293 3156 9291 3155 9352
TIME...MOT...LOC 0539Z 266DEG 59KT 3164 9345
$$
062 follow-up statements
348
WWUS54 KSHV 270556
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1256 AM CDT WED APR 27 2011
LAC069-085-270645-
/O.CON.KSHV.TO.W.0060.000000T0000Z-110427T0645Z/
NATCHITOCHES LA-SABINE LA-
1256 AM CDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 AM CDT FOR SABINE
AND NATCHITOCHES PARISHES...
AT 1251 AM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF
PRODUCING A TORNADO. THIS STORM WAS LOCATED NEAR HAGEWOOD...OR 9
MILES WEST OF NATCHITOCHES...MOVING EAST AT 55 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
NATCHITOCHES...FLORA...NATCHEZ...BERMUDA...CLARENCE...MELROSE AND ST.
MAURICE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
&&
LAT...LON 3176 9340 3184 9295 3179 9295 3177 9297
3172 9296 3168 9293 3156 9291 3155 9338
TIME...MOT...LOC 0554Z 260DEG 65KT 3172 9317
$$
06421
WWUS54 KSHV 270625
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
125 AM CDT WED APR 27 2011
LAC069-085-270635-
/O.CAN.KSHV.TO.W.0060.000000T0000Z-110427T0645Z/
NATCHITOCHES LA-SABINE LA-
125 AM CDT WED APR 27 2011
...THE TORNADO WARNING FOR SABINE AND NATCHITOCHES PARISHES IS
CANCELLED...
LAT...LON 3176 9340 3184 9295 3179 9295 3177 9297
3172 9296 3168 9293 3156 9291 3155 9338
TIME...MOT...LOC 0625Z 260DEG 65KT 3180 9252
$$
06The 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, 10:46 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Claiborne, Jackson, Lincoln, Red River, Union | 44 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, 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
Tornado Warnings in Louisiana, 2011Every tornado warning in 2011Tornadoes 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.