Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 207, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Nov 11, 2021, 1:32 AM CST for 8 parishes in Louisiana. It was in force for 58 min. 2 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
- Nov 11, 2021, 1:32 AM CST (07:32 UTC)
- Expired
- Nov 11, 2021, 2:30 AM CST
- In force
- 58 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Lincoln Parish, LA, Union Parish, LA, Webster Parish, LA
The radar
The Shreveport radar (KSHV), 73 km from the middle of the area, began a volume at 07:37 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 11, 1:35 AM CST | TSTM WND DMG | 10 Se Barksdale Air For, LA | BOSSIER PARISH SHERIFF REPORTS LARGE TREE ACROSS HWY 527 NEAR SUNSET VILLA DRIVE. |
| Nov 11, 2:07 AM CST | TSTM WND DMG | 5 S Ringgold, LA | POWERLINES DOWNED NEAR HWY. 783 AND HWY. 371 SOUTH OF RINGGOLD IN THE WOODARDVILLE COMMUNITY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 7.5 hours before the alert went out and 64 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
- 158 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 968 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 302 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
The text
As transmitted.
430 WUUS54 KSHV 110732 SVRSHV LAC013-015-017-027-031-061-111-119-110830- /O.NEW.KSHV.SV.W.0207.211111T0732Z-211111T0830Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Shreveport LA 132 AM CST Thu Nov 11 2021 The National Weather Service in Shreveport has issued a * Severe Thunderstorm Warning for... Webster Parish in northwestern Louisiana... North central De Soto Parish in northwestern Louisiana... West central Union Parish in north central Louisiana... Southeastern Caddo Parish in northwestern Louisiana... Southern Claiborne Parish in northwestern Louisiana... Bienville Parish in northwestern Louisiana... Southeastern Bossier Parish in northwestern Louisiana... Western Lincoln Parish in north central Louisiana... * Until 230 AM CST. * At 132 AM CST, severe thunderstorms were located along a line extending from 7 miles southwest of Cotton Valley to 7 miles northeast of Stonewall, moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Shreveport, Bossier City, Minden, Homer, Haughton, Arcadia, Stonewall, Bernice, Ringgold, Sibley, Cotton Valley, Gibsland, Doyline, Dixie Inn, Dubberly, Heflin, Eastwood, Fosters, Cooley and Simsboro. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Intense thunderstorm lines can produce brief tornadoes and widespread significant wind damage. Although a tornado is not immediately likely, it is best to move to an interior room on the lowest floor of a building. These storms may cause serious injury and significant property damage. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3289 9259 3226 9289 3226 9380 3279 9355 TIME...MOT...LOC 0732Z 266DEG 41KT 3274 9352 3233 9371 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ 24
1 follow-up statement
510 WWUS54 KSHV 110805 SVSSHV Severe Weather Statement National Weather Service Shreveport LA 205 AM CST Thu Nov 11 2021 LAC015-017-031-110814- /O.CAN.KSHV.SV.W.0207.000000T0000Z-211111T0830Z/ De Soto LA-Caddo LA-Bossier LA- 205 AM CST Thu Nov 11 2021 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL DE SOTO... SOUTHEASTERN CADDO AND SOUTHEASTERN BOSSIER PARISHES IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. LAT...LON 3289 9259 3226 9289 3226 9339 3282 9321 TIME...MOT...LOC 0804Z 266DEG 41KT 3276 9316 3235 9335 $$ LAC013-027-061-111-119-110830- /O.CON.KSHV.SV.W.0207.000000T0000Z-211111T0830Z/ Webster LA-Union LA-Claiborne LA-Bienville LA-Lincoln LA- 205 AM CST Thu Nov 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CST FOR SOUTHEASTERN WEBSTER...WEST CENTRAL UNION...SOUTHERN CLAIBORNE... BIENVILLE AND WESTERN LINCOLN PARISHES... At 204 AM CST, severe thunderstorms were located along a line extending from 6 miles west of Homer to near Ringgold, moving east at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Minden, Homer, Arcadia, Bernice, Ringgold, Sibley, Gibsland, Dubberly, Heflin, Cooley, Simsboro, Lucky, Castor, Athens, Bienville, Lisbon, Jamestown, Bryceland, Mount Lebanon and Brice. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Intense thunderstorm lines can produce brief tornadoes and widespread significant wind damage. Although a tornado is not immediately likely, it is best to move to an interior room on the lowest floor of a building. These storms may cause serious injury and significant property damage. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3289 9259 3226 9289 3226 9339 3282 9321 TIME...MOT...LOC 0804Z 266DEG 41KT 3276 9316 3235 9335 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ 24
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 11, 12:36 AM CST | Special Weather Statement | SHV | Bossier, Caddo | 39 min |
| Nov 11, 12:50 AM CST | Tornado Warning | SHV | Caddo | 25 min |
| Nov 11, 1:14 AM CST | Tornado Warning | SHV | Bossier, Caddo | 22 min |
| Nov 11, 1:18 AM CST | Special Weather Statement | SHV | De Soto | 57 min |
| Nov 11, 1:23 AM CST | Special Weather Statement | SHV | Bossier, Webster | 67 min |
| Nov 11, 2:05 AM CST | Tornado Warning | SHV | Bienville, Red River | 25 min |
| Nov 11, 2:20 AM CST | Special Weather Statement | SHV | Red River, Sabine | 40 min |
| Nov 11, 2:30 AM CST | Special Weather Statement | SHV | Bienville, Lincoln | 45 min |
| Nov 11, 2:56 AM CST | Special Weather Statement | SHV | Jackson, Lincoln, Union | 34 min |
| Nov 11, 2:59 AM CST | Special Weather Statement | SHV | Natchitoches, Sabine, Winn | 46 min |
| Nov 11, 3:26 AM CST | Special Weather Statement | SHV | Ouachita | 64 min |
| Nov 11, 3:45 AM CST | Special Weather Statement | SHV | Caldwell, Grant, Winn | 60 min |
| Nov 11, 4:36 AM CST | Special Weather Statement | SHV | LaSalle | 24 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Every severe thunderstorm warning in 2021
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.