Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 307, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Oct 21, 2019, 4:49 AM CDT for Panola County, Texas; Caddo Parish, De Soto Parish, Louisiana. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 21, 2019, 4:49 AM CDT (09:49 UTC)
- Expired
- Oct 21, 2019, 5:30 AM CDT
- In force
- 41 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Caddo Parish, LA, De Soto Parish, LA, Panola County, TX
The radar
The Shreveport radar (KSHV), 24 km from the middle of the area, began a volume at 09:53 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 21, 1:50 AM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 9.8 hours before the alert went out and 32 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
- 1268 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1355 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 5.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 21, 4:17 AM CDT, 32 minutes earlier.
Area forecast discussion, Oct 21, 4:17 AM CDT, 32 minutes before
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</html>Hazardous weather outlook, Oct 20, 8:03 PM CDT, 8 hours 46 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Shreveport LA 803 PM CDT Sun Oct 20 2019 ARZ050-051-059>061-070>072-LAZ001>004-010-OKZ077-TXZ096-097- 108>112-124>126-136>138-150-151-211100- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-De Soto-McCurtain- Red River-Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur- Marion-Smith-Gregg-Harrison-Rusk-Panola- 803 PM CDT Sun Oct 20 2019 This Hazardous Weather Outlook is for portions of southwest Arkansas, northwest Louisiana, southeast Oklahoma and northeast Texas. .DAY ONE...Tonight... ...TORNADO WATCH 676 IS IN EFFECT UNTIL 2 AM CDT MONDAY MORNING... Isolated to widely scattered strong to severe thunderstorms will be possible this evening and tonight. A line of strong to severe thunderstorms will develop tonight and move southeast into the Middle Red River Valley of Northeast Texas, Southeast Oklahoma and Southwest Arkansas. This line will continue southeast and may move into Northwest Louisiana just before sunrise Monday morning. Tornadoes, damaging straight-line winds, and large hail will be possible. Locally heavy rainfall could also result in a flash flooding after midnight across the Southeast Oklahoma, Southwest Arkansas, and the northern third of Northeast Texas. .DAYS TWO THROUGH SEVEN...Monday through Saturday... Strong to severe thunderstorms will remain possible over Arkansas and South Central Louisiana until around noon Monday. Isolated tornadoes, damaging straight-line winds, and small hail will remain possible. The severe weather threat will diminish from northwest to southeast. Additional strong thunderstorms will be possible across the region late Thursday or Friday. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters will be needed late tonight and and into Monday morning. ARZ073-LAZ005-006-011>014-017>022-TXZ149-152-153-165>167-211100- Union-Lincoln-Red River-Bienville-Jackson-Ouachita-Sabine- Natchitoches-Winn-Grant-Caldwell-La Salle-Cherokee-Nacogdoches- Shelby-Angelina-San Augustine- 803 PM CDT Sun Oct 20 2019 This Hazardous Weather Outlook is for portions of south central Arkansas, north central Louisiana, northwest Louisiana, east Texas and northeast Texas. .DAY ONE...Tonight... Isolated to widely scattered showers and thunderstorms will be possible across the region late this afternoon into the overnight hours. No severe weather is expected through tonight at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday... Scattered to numerous showers and thunderstorms will become likely Monday across the region with some of these storms possibly containing large hail and damaging thunderstorm wind gusts. An isolated tornado cannot be ruled out. This activity should move south and east of the region late Monday afternoon or Monday Evening. Additional strong thunderstorms will be possible across the region sometime late Thursday or Friday of the upcoming work week. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters should not be needed tonight but will likely become needed on Monday. 09
In the hours before
Local storm report, Oct 21, 2:00 AM CDT, 2 hours 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
200 AM CDT MON OCT 21 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1102 PM TSTM WND DMG VALLIANT 34.00N 95.09W
10/20/2019 MCCURTAIN OK EMERGENCY MNGR
POWERLINES DOWN IN DOWNTOWN VALLIANT.
&&Special weather statement, Oct 21, 3:37 AM CDT, 1 hour 12 minutes before
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</html>Special weather statement, Oct 21, 4:07 AM CDT, 42 minutes before
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</html>Local storm report, Oct 21, 4:08 AM CDT, 41 minutes before
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</html>Local storm report, Oct 21, 4:15 AM CDT, 34 minutes before
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</html>Special weather statement, Oct 21, 4:25 AM CDT, 24 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 20, 7:13 PM CDT | Tornado Warning | SHV | Panola, Rusk | 47 min |
| Oct 20, 7:56 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Panola | 49 min |
| Oct 20, 8:01 PM CDT | Tornado Warning | SHV | Panola | 44 min |
| Oct 20, 9:08 PM CDT | Severe Thunderstorm Warning | SHV | Cass, Marion | 54 min |
| Oct 20, 10:41 PM CDT | Special Weather Statement | SHV | Red River | 49 min |
| Oct 20, 11:16 PM CDT | Severe Thunderstorm Warning | SHV | Bowie, Franklin, Red River, Titus | 59 min |
| Oct 20, 11:24 PM CDT | Severe Thunderstorm Warning | SHV | Franklin, Smith, Wood | 51 min |
| Oct 21, 12:01 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Camp, Franklin, Morris, Titus, Wood | 44 min |
| Oct 21, 12:03 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Red River | 57 min |
| Oct 21, 12:52 AM CDT | Severe Thunderstorm Warning | SHV | Red River | 53 min |
| Oct 21, 1:35 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Franklin, Red River, Titus | 55 min |
| Oct 21, 1:45 AM CDT | Severe Thunderstorm Warning | SHV | Red River | 60 min |
| Oct 21, 2:28 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Camp, Cass, Franklin, Morris, Red River and 2 more | 62 min |
| Oct 21, 2:29 AM CDT | Severe Thunderstorm Warning | SHV | Gregg, Smith, Upshur, Wood | 61 min |
| Oct 21, 3:11 AM CDT | Tornado Warning | SHV | Cass | 34 min |
| Oct 21, 3:30 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass | 60 min |
| Oct 21, 3:37 AM CDT | Special Weather Statement | SHV | Cherokee, Rusk, Smith | 53 min |
| Oct 21, 4:25 AM CDT | Special Weather Statement | SHV | Nacogdoches, Panola, Rusk, Shelby | 65 min |
| Oct 21, 5:30 AM CDT | Special Weather Statement | SHV | Shelby | 60 min |
| Oct 21, 6:28 AM CDT | Special Weather Statement | SHV | Sabine | 62 min |
| Oct 20, 8:30 PM CDT | Tornado Warning | SHV | Caddo | 45 min |
| Oct 20, 9:06 PM CDT | Tornado Warning | SHV | Bossier, Caddo, Webster | 31 min |
| Oct 21, 4:24 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Claiborne, Webster | 66 min |
| Oct 21, 6:27 AM CDT | Special Weather Statement | SHV | Jackson, Ouachita, Union | 63 min |
| Oct 21, 7:26 AM CDT | Special Weather Statement | SHV | Caldwell, Grant, LaSalle | 64 min |
| Oct 21, 7:31 AM CDT | Severe Thunderstorm Warning | SHV | Grant, LaSalle, Natchitoches | 59 min |
| Oct 20, 9:56 PM CDT | Special Weather Statement | SHV | Lafayette | 49 min |
| Oct 20, 11:59 PM CDT | Tornado Warning | SHV | Howard, Sevier | 27 min |
| Oct 21, 2:39 AM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Little River, Miller, Nevada, Sevier | 66 min |
| Oct 21, 4:07 AM CDT | Special Weather Statement | SHV | Nevada | 23 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2019Severe Thunderstorm Warnings in Texas, 2019Every severe thunderstorm warning in 2019
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.