Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 201, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Oct 27, 2021, 11:06 AM CDT for Shelby County, Texas; 5 parishes in Louisiana. It was in force for 39 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
- Oct 27, 2021, 11:06 AM CDT (16:06 UTC)
- Expired
- Oct 27, 2021, 11:45 AM CDT
- In force
- 39 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Red River Parish, LA, Sabine Parish, LA, Shelby County, TX
The radar
The Shreveport radar (KSHV), 46 km from the middle of the area, began a volume at 16:07 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 |
|---|---|---|---|
| Oct 27, 10:08 AM CDT | Tornado Watch | SPC | 5 hr |
| Oct 27, 7:55 AM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 4.1 hours before the alert went out and 47 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
- 395 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 233 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted.
719
WUUS54 KSHV 271606
SVRSHV
LAC015-017-031-081-085-TXC419-271645-
/O.NEW.KSHV.SV.W.0201.211027T1606Z-211027T1645Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
1106 AM CDT Wed Oct 27 2021
The National Weather Service in Shreveport has issued a
* Severe Thunderstorm Warning for...
De Soto Parish in northwestern Louisiana...
Northwestern Red River Parish in northwestern Louisiana...
Southern Caddo Parish in northwestern Louisiana...
South central Bossier Parish in northwestern Louisiana...
Northwestern Sabine Parish in northwestern Louisiana...
Eastern Shelby County in eastern Texas...
* Until 1145 AM CDT.
* At 1105 AM CDT, severe thunderstorms were located along a line
extending from 7 miles south of Greenwood to near Logansport to
near Patroon, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Shreveport, Mansfield, Stonewall, Zwolle, Converse, Oak Grove,
Pleasant Hill, Huxley, South Mansfield, Keachi, Noble, Grand Cane,
Longstreet, Stanley, Keat Chie, Carmel, Grand Bayou, Belmont,
Kingston and Pelican.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 400 PM CDT for northwestern
Louisiana. A Tornado Watch also remains in effect until 400 PM CDT
for northwestern Louisiana...and eastern Texas.
For your protection move to an interior room on the lowest floor of a
building.
If on or near a lake, get away from the water and move indoors or
inside a vehicle. Remember, lightning can strike out to 15 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.
A Tornado Watch remains in effect until 400 PM CDT for northwestern
Louisiana. A Tornado Watch also remains in effect until 400 PM CDT
for northwestern Louisiana...and eastern Texas.
&&
LAT...LON 3242 9348 3203 9346 3165 9344 3161 9394
3200 9397 3229 9402
TIME...MOT...LOC 1605Z 266DEG 27KT 3233 9400 3201 9393 3161 9391
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
16The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 27, 7:19 AM CDT | Special Weather Statement | SHV | Smith, Wood | 26 min |
| Oct 27, 8:38 AM CDT | Special Weather Statement | SHV | Angelina, Nacogdoches | 52 min |
| Oct 27, 9:24 AM CDT | Special Weather Statement | SHV | Rusk | 36 min |
| Oct 27, 9:31 AM CDT | Special Weather Statement | SHV | Angelina, Nacogdoches, San Augustine, Shelby | 59 min |
| Oct 27, 9:41 AM CDT | Special Weather Statement | SHV | Cass, Gregg, Harrison, Marion, Morris, Titus | 64 min |
| Oct 27, 9:53 AM CDT | Severe Thunderstorm Warning | SHV | Gregg, Harrison, Panola, Rusk | 52 min |
| Oct 27, 10:01 AM CDT | Tornado Warning | SHV | Harrison | 29 min |
| Oct 27, 10:08 AM CDT | Special Weather Statement | SHV | Panola | 67 min |
| Oct 27, 10:28 AM CDT | Special Weather Statement | SHV | Sabine, San Augustine, Shelby | 62 min |
| Oct 27, 10:44 AM CDT | Severe Thunderstorm Warning | SHV | Cass, Harrison, Marion, Panola | 46 min |
| Oct 27, 10:47 AM CDT | Special Weather Statement | SHV | Bowie, Cass | 58 min |
| Oct 27, 3:07 PM CDT | Lake Wind Advisory | SHV | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more | 52 hr |
| Oct 27, 3:07 PM CDT | Wind Advisory | SHV | Angelina, Camp, Cherokee, Franklin, Gregg, Morris and 7 more | 28 hr |
| Oct 27, 11:30 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 45 min |
| Oct 27, 11:36 AM CDT | Special Weather Statement | SHV | Sabine | 54 min |
| Oct 27, 11:40 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Caddo, De Soto, Natchitoches, Red River and 2 more | 65 min |
| Oct 27, 12:11 PM CDT | Special Weather Statement | SHV | Grant, LaSalle | 64 min |
| Oct 27, 12:12 PM CDT | Special Weather Statement | SHV | Bossier, Webster | 63 min |
| Oct 27, 12:29 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Sabine, Winn | 61 min |
| Oct 27, 12:42 PM CDT | Special Weather Statement | SHV | Bienville, Jackson, Lincoln | 63 min |
| Oct 27, 1:15 PM CDT | Special Weather Statement | SHV | Caldwell, Grant, LaSalle, Winn | 60 min |
| Oct 27, 1:31 PM CDT | Special Weather Statement | SHV | Grant | 44 min |
| Oct 27, 1:39 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Grant, LaSalle, Winn | 66 min |
| Oct 27, 2:16 PM CDT | Special Weather Statement | SHV | Caldwell, Ouachita | 29 min |
| Oct 27, 2:43 PM CDT | Special Weather Statement | SHV | Caldwell, Ouachita | 47 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Severe Thunderstorm Warnings in Texas, 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.