Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 7, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Feb 28, 2021, 6:44 PM CST for Bossier Parish, Caddo Parish, Louisiana; Lafayette County, Miller County, Arkansas. It was in force for 31 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
- Feb 28, 2021, 6:44 PM CST (00:44 UTC)
- Expired
- Feb 28, 2021, 7:15 PM CST
- In force
- 31 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lafayette County, AR, Miller County, AR, Bossier Parish, LA, Caddo Parish, LA
The radar
The Shreveport radar (KSHV), 66 km from the middle of the area, began a volume at 00:48 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 28, 5:54 PM CST | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 0.7 hours before the alert went out and 62 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
- 1289 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 813 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 203 m²/s²
- 0-3 km storm-relative helicity
- 213 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 7.9
The text
As transmitted.
107 WUUS54 KSHV 010044 SVRSHV ARC073-091-LAC015-017-010115- /O.NEW.KSHV.SV.W.0007.210301T0044Z-210301T0115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Shreveport LA 644 PM CST Sun Feb 28 2021 The National Weather Service in Shreveport has issued a * Severe Thunderstorm Warning for... Southeastern Miller County in southwestern Arkansas... Southwestern Lafayette County in southwestern Arkansas... North central Caddo Parish in northwestern Louisiana... Northwestern Bossier Parish in northwestern Louisiana... * Until 715 PM CST. * At 644 PM CST, a severe thunderstorm was located near Ida, or 20 miles west of Springhill, moving northeast at 30 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Bradley, Ida, Canfield, Canale, Pleasant Valley and Gin City. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3292 9382 3302 9390 3326 9371 3308 9350 TIME...MOT...LOC 0044Z 226DEG 25KT 3302 9381 TORNADO...POSSIBLE HAIL...<.75IN WIND...60MPH $$ 20
1 follow-up statement
066
WWUS54 KSHV 010058
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
658 PM CST Sun Feb 28 2021
LAC017-010107-
/O.CAN.KSHV.SV.W.0007.000000T0000Z-210301T0115Z/
Caddo LA-
658 PM CST Sun Feb 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CADDO PARISH IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CST for
southwestern Arkansas...and northwestern Louisiana.
LAT...LON 3298 9371 3308 9381 3326 9371 3308 9350
TIME...MOT...LOC 0057Z 226DEG 25KT 3309 9373
$$
ARC073-091-LAC015-010115-
/O.CON.KSHV.SV.W.0007.000000T0000Z-210301T0115Z/
Miller AR-Lafayette AR-Bossier LA-
658 PM CST Sun Feb 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CST
FOR SOUTHEASTERN MILLER...SOUTHWESTERN LAFAYETTE COUNTIES IN
SOUTHWESTERN ARKANSAS AND NORTH CENTRAL BOSSIER PARISHES...
At 657 PM CST, a severe thunderstorm was located near Bradley, or 16
miles west of Springhill, moving northeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Bradley, Canfield and Gin City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3298 9371 3308 9381 3326 9371 3308 9350
TIME...MOT...LOC 0057Z 226DEG 25KT 3309 9373
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
20The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 6:07 PM CST | Tornado Warning | SHV | Bossier, Caddo | 38 min |
| Feb 28, 8:08 PM CST | Tornado Warning | SHV | Bossier, Caddo, Webster | 52 min |
| Mar 1, 12:27 PM CST | River Flood Warning | SHV | Bienville, Bossier, Red River, Webster | 11 days |
| Feb 28, 6:41 PM CST | Special Weather Statement | SHV | Nevada | 34 min |
| Feb 28, 7:16 PM CST | Special Weather Statement | SHV | Nevada | 44 min |
| Feb 28, 11:37 PM CST | Special Weather Statement | SHV | Lafayette, Miller | 38 min |
| Mar 1, 12:16 AM CST | Special Weather Statement | SHV | Nevada | 29 min |
| Mar 1, 3:58 PM CST | Areal Flood Advisory | SHV | Union | 2 hr |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Severe Thunderstorm Warnings in Arkansas, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.