Alert archive / Texas / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 233, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Dec 27, 2018, 5:22 AM CST for Sabine County, Shelby County, Texas; Natchitoches Parish, Sabine Parish, Louisiana. It was in force for 53 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
- Dec 27, 2018, 5:22 AM CST (11:22 UTC)
- Expired
- Dec 27, 2018, 6:15 AM CST
- In force
- 53 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Natchitoches Parish, LA, Sabine Parish, LA, Sabine County, TX, Shelby County, TX
The radar
The Ft Polk radar (KPOE), 82 km from the middle of the area, began a volume at 11:21 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 |
|---|---|---|---|
| Dec 27, 3:43 AM CST | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Shreveport, LA (KBAD), launched 00:00Z, 11.4 hours before the alert went out and 98 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 280 m²/s²
- 0-3 km storm-relative helicity
- 510 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Dec 27, 5:00 AM CST, 22 minutes earlier.
Area forecast discussion, Dec 27, 5:00 AM CST, 22 minutes before
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Hazardous Weather Outlook National Weather Service Shreveport LA 158 PM CST Wed Dec 26 2018 ARZ050-051-059>061-070-071-LAZ001-002-010-OKZ077-TXZ096-097- 108>112-124>126-136>138-149>153-165-166-271800- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Caddo-Bossier-De Soto-McCurtain-Red River-Bowie-Franklin-Titus- Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee- Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine- 158 PM CST Wed Dec 26 2018 This Hazardous Weather Outlook is for portions of southwest Arkansas, northwest Louisiana, southeast Oklahoma and northeast Texas. .DAY ONE...This Afternoon and Tonight... ...Lake Wind Advisory remains in effect until Noon on Thursday... Showers and thunderstorms will become numerous overnight across the region and some of these could become severe with damaging wind gusts and isolated tornadoes the probable threats. In addition to the severe weather threat, excessive heavy rainfall will be possible with rainfall amounts of 2 to 4 inches possible with isolated higher amounts until the storm system moves east of the region on Thursday. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Scattered to numerous showers and isolated thunderstorms will move back into the forecast for this weekend through at least New Years Eve. At this time, strong to severe thunderstorms do not appear likely, nor does the threat for excessive heavy rainfall, but these threats will continue to be monitored with future forecasts. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters will likely be needed later this evening into the overnight hours with the threat of Severe Thunderstorms. ARZ072-073-LAZ003>006-011>014-017>022-TXZ167-271800- Columbia-Union-Webster-Claiborne-Lincoln-Red River-Bienville- Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-Caldwell-La Salle- 158 PM CST Wed Dec 26 2018 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana and east Texas. .DAY ONE...This Afternoon and Tonight... ...Lake Wind Advisory remains in effect until Noon on Thursday... Scattered to numerous showers and thunderstorms will increase across the region from the south and west later this evening into the overnight hours. While an isolated strong or severe thunderstorm is certainly possible tonight, a more widespread damaging wind threat will likely materialize near or just after sunrise Thursday Morning. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Damaging wind gusts and isolated tornadoes will likely accompany a line of strong to severe thunderstorms Thursday Morning before the storms exit the region Thursday Afternoon. In addition to the severe weather threat, excessive heavy rainfall will be possible with rainfall amounts of 2 to 4 inches possible with isolated higher amounts until the storm system moves east of the region on Thursday afternoon. Scattered to numerous showers and isolated thunderstorms will move back into the forecast for this weekend through at least New Years Eve. At this time, strong to severe thunderstorms do not appear likely, nor does the threat for excessive heavy rainfall, but these threats will continue to be monitored with future forecasts. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters will likely not be needed overnight but could be needed early Thursday for the threat of Severe Thunderstorms. 13
In the hours before
Local storm report, Dec 27, 4:46 AM CST, 36 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 |
|---|---|---|---|---|
| Dec 26, 6:20 PM CST | Special Weather Statement | SHV | Franklin, Wood | 55 min |
| Dec 26, 7:01 PM CST | Special Weather Statement | SHV | Gregg | 29 min |
| Dec 26, 9:54 PM CST | Severe Thunderstorm Warning | SHV | Cherokee, Gregg, Rusk, Smith | 23 min |
| Dec 26, 9:56 PM CST | Severe Thunderstorm Warning | SHV | Angelina, Cherokee, Nacogdoches, Rusk, Shelby | 49 min |
| Dec 26, 10:15 PM CST | Severe Thunderstorm Warning | SHV | Camp, Cass, Gregg, Marion, Morris, Smith and 3 more | 29 min |
| Dec 26, 11:09 PM CST | Tornado Warning | SHV | Camp, Morris, Titus, Upshur, Wood | 36 min |
| Dec 26, 11:10 PM CST | Tornado Warning | SHV | Bowie, Camp, Cass, Morris, Red River, Titus and 1 more | 35 min |
| Dec 26, 11:43 PM CST | Tornado Warning | SHV | Bowie, Cass, Morris | 47 min |
| Dec 27, 12:10 AM CST | Tornado Warning | SHV | Cass, Gregg, Harrison, Marion, Upshur | 50 min |
| Dec 27, 12:24 AM CST | Tornado Warning | SHV | Bowie, Cass | 31 min |
| Dec 27, 12:53 AM CST | Severe Thunderstorm Warning | SHV | Bowie, Cass, Harrison, Marion | 52 min |
| Dec 27, 12:55 AM CST | Tornado Warning | SHV | Harrison, Marion | 25 min |
| Dec 27, 1:23 AM CST | Tornado Warning | SHV | Marion | 37 min |
| Dec 27, 1:30 AM CST | Severe Thunderstorm Warning | SHV | Cass, Harrison, Marion | 60 min |
| Dec 27, 1:37 AM CST | Tornado Warning | SHV | Harrison | 38 min |
| Dec 27, 1:43 AM CST | Tornado Warning | SHV | Nacogdoches, Panola, Rusk, Shelby | 32 min |
| Dec 27, 2:07 AM CST | Tornado Warning | SHV | Panola | 27 min |
| Dec 27, 4:52 AM CST | Special Weather Statement | SHV | Sabine | 68 min |
| Dec 27, 5:09 AM CST | Areal Flood Advisory | SHV | Angelina, Nacogdoches, Sabine, San Augustine, Shelby | 4 hr |
| Dec 27, 5:17 AM CST | Areal Flood Advisory | SHV | Cherokee, Nacogdoches, Rusk | 4 hr |
| Dec 27, 7:10 AM CST | River Flood Warning | SHV | Angelina, Cherokee, Nacogdoches | 5 days |
| Dec 27, 7:11 AM CST | River Flood Warning | SHV | Anderson, Cherokee, Houston | 33 days |
| Dec 27, 7:11 AM CST | River Flood Warning | SHV | Anderson, Cherokee, Houston, Trinity | 25 days |
| Dec 27, 7:12 AM CST | River Flood Warning | SHV | Smith, Wood | 24 days |
| Dec 27, 7:12 AM CST | River Flood Warning | SHV | Gregg, Smith, Upshur, Wood | 25 days |
| Dec 27, 7:12 AM CST | River Flood Warning | SHV | Gregg, Rusk | 5 days |
| Dec 27, 7:12 AM CST | River Flood Warning | SHV | Gregg, Harrison, Panola, Rusk | 26 days |
| Dec 27, 7:12 AM CST | River Flood Warning | SHV | Cherokee, Nacogdoches, Rusk, Smith | 3 days |
| Dec 27, 8:28 AM CST | River Flood Warning | SHV | Bowie, Red River | 47 hr |
| Dec 27, 8:48 AM CST | River Flood Warning | SHV | Wood | 4 days |
| Dec 27, 8:50 AM CST | River Flood Warning | SHV | Cass, Marion | 15 days |
| Dec 27, 8:50 AM CST | River Flood Warning | SHV | Gregg, Harrison, Marion, Upshur | 26 hr |
| Dec 27, 9:03 AM CST | Areal Flood Advisory | SHV | Angelina, Nacogdoches, Sabine, San Augustine, Shelby | 4 hr |
| Dec 27, 9:06 AM CST | Areal Flood Advisory | SHV | Cherokee, Nacogdoches, Rusk | 4 hr |
| Dec 27, 1:54 AM CST | Tornado Warning | SHV | Bossier, Webster | 25 min |
| Dec 27, 6:06 AM CST | Special Weather Statement | SHV | Bienville, Jackson, Lincoln | 39 min |
| Dec 27, 6:14 AM CST | Special Weather Statement | SHV | Natchitoches, Winn | 61 min |
| Dec 27, 6:40 AM CST | Tornado Warning | SHV | Natchitoches, Sabine | 50 min |
| Dec 27, 7:13 AM CST | Special Weather Statement | SHV | Ouachita | 32 min |
| Dec 27, 7:16 AM CST | Special Weather Statement | SHV | Caldwell, Grant, Winn | 59 min |
| Dec 27, 8:22 AM CST | Special Weather Statement | SHV | LaSalle | 38 min |
| Dec 27, 9:24 AM CST | River Flood Warning | SHV | Bienville, Bossier, Red River, Webster | 18 days |
| Dec 27, 3:05 PM CST | River Flood Warning | SHV | Caddo, De Soto | 14 days |
Nearby
Severe Thunderstorm Warnings in Texas, 2018Severe Thunderstorm Warnings in Louisiana, 2018Every severe thunderstorm warning in 2018
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.