Alert archive / Louisiana / Tornado Warnings in 2011
Tornado Warning 94, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Nov 8, 2011, 6:42 PM CST for 4 parishes in Louisiana. It was in force for 48 min. 1 report 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
- Nov 8, 2011, 6:42 PM CST (00:42 UTC)
- Expired
- Nov 8, 2011, 7:30 PM CST
- In force
- 48 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Bienville Parish, LA, Claiborne Parish, LA, Lincoln Parish, LA, Webster Parish, LA
The radar
The Shreveport radar (KSHV), 89 km from the middle of the area, began a volume at 00:41 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 |
|---|---|---|---|
| Nov 8, 6:49 PM CST | TSTM WND DMG | 2 Nw Gibsland, LA | TREE DEBRIS NOTED ALONG INTERSTATE 20...BETWEEN MILE MARKERS 56 AND 57. |
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 |
|---|---|---|---|
| Nov 8, 5:30 PM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 0.7 hours before the alert went out and 270 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
- 107 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1030 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
458 WFUS54 KSHV 090042 TORSHV LAC013-027-061-119-090130- /O.NEW.KSHV.TO.W.0094.111109T0042Z-111109T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 642 PM CST TUE NOV 8 2011 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN LINCOLN PARISH IN NORTH CENTRAL LOUISIANA... NORTH CENTRAL BIENVILLE PARISH IN NORTHWEST LOUISIANA... SOUTHERN CLAIBORNE PARISH IN NORTHWEST LOUISIANA... EAST CENTRAL WEBSTER PARISH IN NORTHWEST LOUISIANA... THIS INCLUDES THE CITY OF MINDEN... * UNTIL 730 PM CST * AT 637 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST OF GIBSLAND...OR 8 MILES SOUTHEAST OF MINDEN...MOVING NORTHEAST AT 35 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ARCADIA... PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE. && LAT...LON 3284 9282 3262 9254 3244 9316 3263 9330 TIME...MOT...LOC 0041Z 243DEG 29KT 3257 9313 $$ VII
1 follow-up statement
802 WWUS54 KSHV 090114 SVSSHV SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 714 PM CST TUE NOV 8 2011 LAC119-090123- /O.CAN.KSHV.TO.W.0094.000000T0000Z-111109T0130Z/ WEBSTER LA- 714 PM CST TUE NOV 8 2011 ...THE TORNADO WARNING FOR WEBSTER PARISH IS CANCELLED... LAT...LON 3272 9309 3284 9282 3262 9254 3247 9306 TIME...MOT...LOC 0113Z 241DEG 47KT 3265 9288 $$ LAC013-027-061-090130- /O.CON.KSHV.TO.W.0094.000000T0000Z-111109T0130Z/ LINCOLN LA-CLAIBORNE LA-BIENVILLE LA- 714 PM CST TUE NOV 8 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CST FOR BIENVILLE...CLAIBORNE AND LINCOLN PARISHES... AT 711 PM CST...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM...WITH A HISTORY OF PRODUCING TORNADOES. THIS STORM WAS LOCATED NEAR AYCOCK...OR 14 MILES SOUTHEAST OF HOMER...MOVING NORTHEAST AT 40 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LISBON...CORINTH...MOUNT ZION...VIENNA...DUBACH AND UNIONVILLE LAT...LON 3272 9309 3284 9282 3262 9254 3247 9306 TIME...MOT...LOC 0113Z 241DEG 47KT 3265 9288 $$ VII
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 8, 6:00 PM CST | Tornado Warning | SHV | Bienville, Bossier, Webster | 45 min |
| Nov 8, 6:06 PM CST | Severe Thunderstorm Warning | SHV | Claiborne, Union, Webster | 39 min |
| Nov 8, 7:26 PM CST | Severe Thunderstorm Warning | SHV | Bienville, Claiborne, Jackson, Lincoln, Ouachita, Union | 64 min |
| Nov 8, 8:34 PM CST | Tornado Warning | SHV | Jackson, Ouachita | 41 min |
| Nov 8, 8:37 PM CST | Tornado Warning | SHV | Grant, Natchitoches, Sabine | 38 min |
| Nov 8, 9:31 PM CST | Areal Flood Advisory | SHV | Ouachita | 119 min |
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; radar from the NEXRAD Level II archive.