Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 200, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Oct 27, 2021, 10:44 AM CDT for 4 counties in Texas; Caddo Parish, Louisiana. It was in force for 46 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
- Oct 27, 2021, 10:44 AM CDT (15:44 UTC)
- Expired
- Oct 27, 2021, 11:30 AM CDT
- In force
- 46 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Caddo Parish, LA, Cass County, TX, Harrison County, TX, Marion County, TX, Panola County, TX
The radar
The Shreveport radar (KSHV), 25 km from the middle of the area, began a volume at 15:44 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 |
|---|---|---|---|
| Oct 27, 11:25 AM CDT | TSTM WND DMG | 3 Wsw Shreveport, LA | TREE DOWN NEAR FINANCIAL PLAZA WEST OF THE AIRPORT. |
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 |
|---|---|---|---|
| Oct 27, 10:08 AM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 3.7 hours before the alert went out and 26 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.
754
WUUS54 KSHV 271544
SVRSHV
LAC017-TXC067-203-315-365-271630-
/O.NEW.KSHV.SV.W.0200.211027T1544Z-211027T1630Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
1044 AM CDT Wed Oct 27 2021
The National Weather Service in Shreveport has issued a
* Severe Thunderstorm Warning for...
Caddo Parish in northwestern Louisiana...
Eastern Marion County in northeastern Texas...
Southeastern Cass County in northeastern Texas...
Eastern Harrison County in northeastern Texas...
Northeastern Panola County in northeastern Texas...
* Until 1130 AM CDT.
* At 1042 AM CDT, severe thunderstorms were located along a line
extending from Lodi to near Smithland to near Karnack to near
Waskom to Elysian Fields, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Shreveport, Marshall, Vivian, Greenwood, Blanchard, Waskom,
Jefferson, Linden, Oil City, Mooringsport, Hosston, Rodessa,
Belcher, Ida, Gilliam, Deberry, Elysian Fields, Lodi, Smithland and
McLeod.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 400 PM CDT for northwestern
Louisiana...and northeastern Texas.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 400 PM CDT for northwestern
Louisiana...and northeastern Texas.
&&
LAT...LON 3300 9445 3302 9388 3280 9381 3279 9382
3279 9381 3276 9380 3272 9383 3273 9379
3267 9379 3267 9378 3265 9377 3265 9378
3254 9376 3254 9377 3252 9375 3249 9374
3236 9373 3222 9433 3235 9432 3262 9435
TIME...MOT...LOC 1542Z 267DEG 31KT 3287 9428 3275 9420 3261 9415 3247
9415 3235 9416
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
191 follow-up statement
341
WWUS54 KSHV 271607
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
1107 AM CDT Wed Oct 27 2021
LAC017-TXC067-203-315-365-271630-
/O.CON.KSHV.SV.W.0200.000000T0000Z-211027T1630Z/
Caddo LA-Marion TX-Cass TX-Harrison TX-Panola TX-
1107 AM CDT Wed Oct 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT
FOR CADDO PARISH...EASTERN MARION...SOUTHEASTERN CASS...EASTERN
HARRISON AND NORTHEASTERN PANOLA COUNTIES...
At 1106 AM CDT, severe thunderstorms were located along a line
extending from near Vivian to Oil City to near Blanchard to near
Greenwood to 9 miles northwest of Stonewall, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Shreveport, Vivian, Greenwood, Blanchard, Waskom, Oil City,
Mooringsport, Hosston, Rodessa, Belcher, Ida, Gilliam, Smithland,
McLeod, Kildare, Karnack, Gray, Uncertain, Spring Ridge and Cross
Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 400 PM CDT for northwestern
Louisiana...and northeastern Texas.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3302 9388 3280 9381 3279 9382 3279 9381
3276 9380 3272 9383 3273 9379 3267 9379
3265 9377 3265 9378 3254 9376 3249 9374
3236 9373 3226 9415 3241 9414 3260 9416
3285 9425 3300 9434
TIME...MOT...LOC 1606Z 267DEG 31KT 3288 9406 3276 9398 3262 9393 3248
9393 3236 9394
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
19The 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, 10:47 AM CDT | Special Weather Statement | SHV | Bowie, Cass | 58 min |
| Oct 27, 11:06 AM CDT | Severe Thunderstorm Warning | SHV | Shelby | 39 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 Texas, 2021Severe 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.