Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 16, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Mar 17, 2021, 8:34 AM CDT for 6 counties in Texas; Bossier Parish, Caddo Parish, Louisiana; Lafayette County, Miller County, Arkansas. It was in force for 56 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
- Mar 17, 2021, 8:34 AM CDT (13:34 UTC)
- Expired
- Mar 17, 2021, 9:30 AM CDT
- In force
- 56 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Lafayette County, AR, Miller County, AR, Bossier Parish, LA, Caddo Parish, LA, Cass County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Panola County, TX, Rusk County, TX
The radar
The Shreveport radar (KSHV), 49 km from the middle of the area, began a volume at 13:38 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 |
|---|---|---|---|
| Mar 17, 8:52 AM CDT | TSTM WND DMG | 4 Sw Uncertain, TX | TREES DOWN IN KARNACK, TROOPER VEHICLE DAMAGED WITH FALLING TREE, NO INJURIES. |
| Mar 17, 8:55 AM CDT | TSTM WND DMG | 6 S Scottsville, TX | TREES DOWN IN ELYSIAN FIELDS AND A TREE FELL ON A TROOPERS VEHICLE DAMAGING THE VEHICLE, NO INJURIES. |
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 |
|---|---|---|---|
| Mar 17, 4:37 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 1.6 hours before the alert went out and 50 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
- 1417 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 682 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 328 m²/s²
- 0-3 km storm-relative helicity
- 340 m²/s²
- Significant tornado parameter
- 2.7
- Supercell composite
- 14.5
The text
As transmitted.
596
WUUS54 KSHV 171334
SVRSHV
ARC073-091-LAC015-017-TXC067-183-203-315-365-401-171430-
/O.NEW.KSHV.SV.W.0016.210317T1334Z-210317T1430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
834 AM CDT Wed Mar 17 2021
The National Weather Service in Shreveport has issued a
* Severe Thunderstorm Warning for...
Southern Miller County in southwestern Arkansas...
Southwestern Lafayette County in southwestern Arkansas...
Caddo Parish in northwestern Louisiana...
Northwestern Bossier Parish in northwestern Louisiana...
Marion County in northeastern Texas...
Southeastern Cass County in northeastern Texas...
Harrison County in northeastern Texas...
Northern Panola County in northeastern Texas...
Northeastern Rusk County in northeastern Texas...
Southeastern Gregg County in northeastern Texas...
* Until 930 AM CDT.
* At 834 AM CDT, severe thunderstorms were located along a line
extending from near Kildare to near Tatum, moving northeast at 65
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Shreveport, Marshall, Atlanta, Vivian, Hallsville, Greenwood,
Blanchard, Waskom, Jefferson, Linden, Benton, Tatum, Plain Dealing,
Oil City, Mooringsport, Bradley, Hosston, Rodessa, Belcher and Ida.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3305 9441 3325 9348 3318 9348 3233 9392
3223 9467
TIME...MOT...LOC 1334Z 237DEG 58KT 3292 9428 3227 9457
HAIL...1.00IN
WIND...60MPH
$$
Thorne1 follow-up statement
158
WWUS54 KSHV 171405
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
905 AM CDT Wed Mar 17 2021
TXC183-401-171414-
/O.CAN.KSHV.SV.W.0016.000000T0000Z-210317T1430Z/
Rusk TX-Gregg TX-
905 AM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RUSK AND
SOUTHEASTERN GREGG COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 100 PM CDT for southwestern
Arkansas...and northwestern Louisiana.
A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
southwestern Arkansas...and northeastern Texas.
LAT...LON 3310 9417 3325 9348 3318 9348 3233 9392
3226 9447
TIME...MOT...LOC 1404Z 270DEG 58KT 3317 9382 3252 9411
$$
ARC073-091-LAC015-017-TXC067-203-315-365-171430-
/O.CON.KSHV.SV.W.0016.000000T0000Z-210317T1430Z/
Miller AR-Lafayette AR-Caddo LA-Bossier LA-Marion TX-Cass TX-
Harrison TX-Panola TX-
905 AM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM CDT
FOR SOUTHERN MILLER AND SOUTHWESTERN LAFAYETTE COUNTIES...CADDO AND
NORTHWESTERN BOSSIER PARISHES...EASTERN MARION...SOUTHEASTERN CASS...
EASTERN HARRISON AND NORTHEASTERN PANOLA COUNTIES...
At 904 AM CDT, severe thunderstorms were located along a line
extending from 7 miles southeast of Fouke to near Waskom, moving east
at 65 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Shreveport, Marshall, Atlanta, Vivian, Greenwood, Blanchard, Waskom,
Benton, Plain Dealing, Oil City, Mooringsport, Bradley, Hosston,
Rodessa, Belcher, Ida, Gilliam, Deberry, Bivins and Elysian Fields.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 100 PM CDT for southwestern
Arkansas...and northwestern Louisiana.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3310 9417 3325 9348 3318 9348 3233 9392
3226 9447
TIME...MOT...LOC 1404Z 270DEG 58KT 3317 9382 3252 9411
HAIL...1.00IN
WIND...60MPH
$$
ThorneThe office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 1:30 AM CDT | Special Weather Statement | SHV | Marion | 45 min |
| Mar 17, 2:45 AM CDT | Lake Wind Advisory | SHV | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more | 40 hr |
| Mar 17, 6:12 AM CDT | Severe Thunderstorm Warning | SHV | Camp, Franklin, Smith, Titus, Wood | 63 min |
| Mar 17, 6:49 AM CDT | Special Weather Statement | SHV | Cherokee, Smith | 41 min |
| Mar 17, 6:56 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Camp, Franklin, Morris, Red River, Titus | 49 min |
| Mar 17, 7:08 AM CDT | Tornado Warning | SHV | Bowie, Cass, Morris, Red River, Titus | 37 min |
| Mar 17, 7:12 AM CDT | Special Weather Statement | SHV | Camp, Gregg, Morris, Upshur | 48 min |
| Mar 17, 7:32 AM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Gregg, Harrison, Marion, Panola, Rusk and 2 more | 58 min |
| Mar 17, 7:36 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass, Morris | 54 min |
| Mar 17, 7:43 AM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Nacogdoches, Panola, Rusk, Smith | 62 min |
| Mar 17, 7:59 AM CDT | Special Weather Statement | SHV | Cass | 31 min |
| Mar 17, 8:27 AM CDT | Severe Thunderstorm Warning | SHV | Angelina, Cherokee, Nacogdoches, Rusk, Shelby | 63 min |
| Mar 17, 8:40 AM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, Panola, Rusk, Shelby | 44 min |
| Mar 17, 9:29 AM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, Panola, Rusk, San Augustine, Shelby | 61 min |
| Mar 17, 11:42 AM CDT | Severe Thunderstorm Warning | SHV | Angelina, Sabine, San Augustine | 48 min |
| Mar 17, 9:31 AM CDT | Special Weather Statement | SHV | Bossier, Caddo, Webster | 59 min |
| Mar 17, 10:29 AM CDT | Special Weather Statement | SHV | De Soto | 61 min |
| Mar 17, 10:36 AM CDT | Special Weather Statement | SHV | Claiborne, Webster | 39 min |
| Mar 17, 11:02 AM CDT | Special Weather Statement | SHV | Bienville, Red River, Webster | 43 min |
| Mar 17, 11:46 AM CDT | Special Weather Statement | SHV | Bienville, Jackson, Red River | 59 min |
| Mar 17, 12:36 PM CDT | Special Weather Statement | SHV | Natchitoches, Red River, Sabine | 39 min |
| Mar 17, 2:08 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Jackson, Lincoln, Ouachita, Union | 52 min |
| Mar 17, 2:16 PM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Lincoln, Union | 44 min |
| Mar 17, 2:32 PM CDT | Tornado Warning | SHV | Union | 43 min |
| Mar 17, 2:58 PM CDT | Tornado Warning | SHV | Lincoln, Ouachita, Union | 47 min |
| Mar 17, 3:12 PM CDT | Tornado Warning | SHV | Jackson, Lincoln, Ouachita, Union | 48 min |
| Mar 17, 3:34 PM CDT | Tornado Warning | SHV | Union | 10 min |
| Mar 17, 12:14 AM CDT | Special Weather Statement | SHV | Union | 46 min |
| Mar 17, 12:21 AM CDT | Severe Thunderstorm Warning | SHV | Union | 39 min |
| Mar 17, 2:01 AM CDT | Special Weather Statement | SHV | Columbia, Lafayette | 44 min |
| Mar 17, 2:41 AM CDT | Special Weather Statement | SHV | Miller | 49 min |
| Mar 17, 8:37 AM CDT | Special Weather Statement | SHV | Hempstead, Lafayette, Miller, Nevada | 53 min |
| Mar 17, 9:26 AM CDT | Special Weather Statement | SHV | Columbia, Lafayette, Nevada | 64 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2021Severe 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.