Alert archive / Texas / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 134, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Apr 28, 2020, 7:46 AM CDT for Harrison County, Marion County, Texas. It was in force for 33 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
- Apr 28, 2020, 7:46 AM CDT (12:46 UTC)
- Expired
- Apr 28, 2020, 8:19 AM CDT
- In force
- 33 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Harrison County, TX, Marion County, TX
The radar
The Shreveport radar (KSHV), 55 km from the middle of the area, began a volume at 12:50 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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 0.8 hours before the alert went out and 305 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
- 1084 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 555 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 253 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
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 Apr 28, 6:39 AM CDT, 1 hour 7 minutes earlier.
Area forecast discussion, Apr 28, 6:39 AM CDT, 1 hour 7 minutes before
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</html>Hazardous weather outlook, Apr 28, 5:41 AM CDT, 2 hours 5 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 541 AM CDT Tue Apr 28 2020 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-291100- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn- Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp- Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk- Panola-Nacogdoches-Shelby-Angelina-San Augustine- 541 AM CDT Tue Apr 28 2020 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma, east Texas and northeast Texas. .DAY ONE...Today and Tonight... Scattered showers and thunderstorms will be possible today across the region, as a warm front lifts north across the area and an upper level disturbance progresses east. An isolated severe weather threat will exist today, with damaging winds and large hail possible. However, a complex of showers and thunderstorms will develop later this afternoon over Central and Northeast Oklahoma, and quickly shift southeast into Southeast Oklahoma, extreme Northeast Texas, and Southwest Arkansas by mid evening. Some of these storms will become severe, with damaging winds, large hail, and isolated tornadoes possible. Heavy rainfall which may lead to localized flooding, will be possible as well, with the line of strong to severe thunderstorms affecting areas along and south of the Interstate 20 corridor of East Texas and North Louisiana after midnight. This thunderstorm complex will exit the region prior to daybreak Wednesday, with the severe threat ending with the departure of these storms. .DAYS TWO THROUGH SEVEN...Wednesday through Monday... No hazardous weather is expected. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters may be needed today, but will be needed tonight areawide. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. 15
In the hours before
Special weather statement, Apr 28, 6:44 AM CDT, 1 hour 2 minutes before
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</html>Special weather statement, Apr 28, 7:31 AM CDT, 15 minutes before
Special Weather Statement National Weather Service Shreveport LA 731 AM CDT Tue Apr 28 2020 TXZ109>112-125-281315- Upshur TX-Cass TX-Camp TX-Morris TX-Titus TX- 731 AM CDT Tue Apr 28 2020 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CASS...NORTH CENTRAL UPSHUR...MORRIS...SOUTHERN TITUS AND CAMP COUNTIES UNTIL 815 AM CDT... At 730 AM CDT, Doppler radar was tracking a strong thunderstorm near Pittsburg, moving east at 30 mph. Penny size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Mount Pleasant, Pittsburg, Leesburg, Daingerfield, Hughes Springs, Lone Star, Naples, Omaha, Cason, Cookville, Jenkins, Rocky Branch, Avinger, Marietta, Rocky Mound, Holly Springs, Roeder, Harvard, Lafayette and Center Point. LAT...LON 3289 9512 3319 9505 3326 9446 3290 9450 TIME...MOT...LOC 1230Z 259DEG 25KT 3305 9502 MD
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 6:44 AM CDT | Special Weather Statement | SHV | Smith | 46 min |
| Apr 28, 7:24 AM CDT | Special Weather Statement | SHV | Gregg, Harrison | 51 min |
| Apr 28, 7:31 AM CDT | Special Weather Statement | SHV | Camp, Morris | 44 min |
| Apr 28, 8:19 AM CDT | Areal Flood Advisory | SHV | Smith | 116 min |
| Apr 28, 8:38 AM CDT | Areal Flood Advisory | SHV | Gregg, Rusk, Smith | 2 hr |
| Apr 28, 8:40 AM CDT | Areal Flood Advisory | SHV | Harrison | 2 hr |
| Apr 28, 8:46 AM CDT | Severe Thunderstorm Warning | SHV | Gregg, Harrison, Panola, Rusk | 44 min |
| Apr 28, 9:03 AM CDT | Special Weather Statement | SHV | Bowie | 57 min |
| Apr 28, 9:26 AM CDT | Severe Thunderstorm Warning | SHV | Panola | 49 min |
| Apr 28, 9:31 AM CDT | Severe Thunderstorm Warning | SHV | Bowie | 59 min |
| Apr 28, 9:38 AM CDT | River Flood Warning | SHV | Franklin, Morris, Red River, Titus | 24 hr |
| Apr 28, 12:11 PM CDT | River Flood Warning | SHV | Gregg | 56 hr |
| Apr 28, 1:53 PM CDT | River Flood Warning | SHV | Nacogdoches, Rusk | 54 hr |
| Apr 28, 1:55 PM CDT | River Flood Warning | SHV | Sabine, San Augustine | 54 hr |
| Apr 28, 2:48 PM CDT | Special Weather Statement | SHV | Angelina | 27 min |
| Apr 28, 3:00 PM CDT | Special Weather Statement | SHV | Sabine, San Augustine | 30 min |
| Apr 28, 3:25 PM CDT | Special Weather Statement | SHV | Nacogdoches | 50 min |
| Apr 28, 3:37 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches | 38 min |
| Apr 28, 3:57 PM CDT | Special Weather Statement | SHV | San Augustine | 48 min |
| Apr 28, 4:01 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches | 44 min |
| Apr 28, 4:19 PM CDT | Special Weather Statement | SHV | Nacogdoches | 41 min |
| Apr 28, 4:35 PM CDT | Special Weather Statement | SHV | San Augustine | 40 min |
| Apr 28, 5:05 PM CDT | Special Weather Statement | SHV | Nacogdoches | 40 min |
| Apr 28, 5:21 PM CDT | Special Weather Statement | SHV | Rusk | 39 min |
| Apr 28, 5:26 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Rusk, Smith | 64 min |
| Apr 28, 5:40 PM CDT | Special Weather Statement | SHV | Nacogdoches | 50 min |
| Apr 28, 6:03 PM CDT | Special Weather Statement | SHV | Rusk | 42 min |
| Apr 28, 6:09 PM CDT | Special Weather Statement | SHV | Rusk | 51 min |
| Apr 28, 6:22 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Rusk, Smith | 43 min |
| Apr 28, 8:18 AM CDT | Special Weather Statement | SHV | Caddo | 42 min |
| Apr 28, 8:37 AM CDT | Special Weather Statement | SHV | Webster | 38 min |
| Apr 28, 9:32 AM CDT | Special Weather Statement | SHV | De Soto | 43 min |
| Apr 28, 9:57 AM CDT | Special Weather Statement | SHV | Caddo | 48 min |
| Apr 28, 10:15 AM CDT | Special Weather Statement | SHV | Natchitoches, Red River | 45 min |
| Apr 28, 10:56 AM CDT | Special Weather Statement | SHV | Natchitoches, Red River, Winn | 49 min |
| Apr 28, 11:09 AM CDT | Special Weather Statement | SHV | Bienville, Jackson, Lincoln | 51 min |
| Apr 28, 11:49 AM CDT | Special Weather Statement | SHV | Grant, LaSalle | 41 min |
| Apr 28, 12:13 PM CDT | Areal Flood Advisory | SHV | Natchitoches, Sabine | 2 hr |
| Apr 28, 12:16 PM CDT | Special Weather Statement | SHV | Sabine | 29 min |
| Apr 28, 10:48 AM CDT | Special Weather Statement | SHV | Nevada | 27 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning in 2020
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.