Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Shreveport, LA
NWS Shreveport, LA issued this special weather statement at Apr 30, 2021, 12:39 AM CDT for Shelby County, Texas. It was in force for 51 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
- Apr 30, 2021, 12:39 AM CDT (05:39 UTC)
- Expired
- Apr 30, 2021, 1:30 AM CDT
- In force
- 51 min
- Issued by
- NWS Shreveport, LA
County Shelby County, TX
The radar
The Shreveport radar (KSHV), 100 km from the middle of the area, began a volume at 05:42 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 00:00Z, 5.7 hours before the alert went out and 181 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
- 1081 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Apr 29, 10:19 PM CDT, 2 hours 20 minutes earlier.
Area forecast discussion, Apr 29, 10:19 PM CDT, 2 hours 20 minutes before
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<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>Hazardous weather outlook, Apr 29, 1:48 PM CDT, 10 hours 51 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 148 PM CDT Thu Apr 29 2021 ARZ050-051-059>061-070>073-OKZ077-TXZ096-097-301900- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-McCurtain-Red River-Bowie- 148 PM CDT Thu Apr 29 2021 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, southeast Oklahoma and northeast Texas. .DAY ONE...This Afternoon and Tonight... Showers and perhaps a few thunderstorms will be possible this afternoon. While a few of the storms may be strong at times, widespread severe weather is not anticipated at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... Some slightly cooler and drier air will filter into the area in wake of the front on Friday, but rain chances will continue through the weekend, as an upper level trough moves across the region. Dry weather will return on Monday, but rain chances return by the middle of next week, as another cool front moves into the region. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters may be needed through Thursday. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. LAZ001>006-010>014-017>022-TXZ108>112-124>126-136>138-149>153- 165>167-301900- Caddo-Bossier-Webster-Claiborne-Lincoln-Union-De Soto-Red River- Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant- Caldwell-La Salle-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur- Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola-Nacogdoches- Shelby-Angelina-San Augustine- 148 PM CDT Thu Apr 29 2021 This Hazardous Weather Outlook is for portions of north central Louisiana, northwest Louisiana, east Texas and northeast Texas. .DAY ONE...This Afternoon and Tonight... Showers and thunderstorms are expected in increase this afternoon. Strong to marginally severe thunderstorms capable of producing some large hail, strong wind gusts, and perhaps a tornado or two will be possible but not highly anticipated and not expected to be widespread. In addition, there is also a potential for heavy rainfall from training showers and thunderstorms that will bring a potential for some localized flash flooding. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... Some slightly cooler and drier air will filter into the area in wake of the front on Friday, but rain chances will continue through the weekend, as an upper level trough moves across the region. Dry weather will return on Monday, but rain chances return by the middle of next week, as another cool front moves into the region. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters may be needed this afternoon and tonight. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines.
In the hours before
Special weather statement, Apr 29, 11:15 PM CDT, 1 hour 24 minutes before
Special Weather Statement National Weather Service Shreveport LA 1115 PM CDT Thu Apr 29 2021 TXZ152-153-166-300500- Nacogdoches TX-San Augustine TX-Shelby TX- 1115 PM CDT Thu Apr 29 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN NACOGDOCHES...SHELBY AND NORTHWESTERN SAN AUGUSTINE COUNTIES UNTIL MIDNIGHT CDT... At 1115 PM CDT, Doppler radar was tracking a strong thunderstorm over Martinsville, or 11 miles east of Nacogdoches, moving northeast at 45 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Center, Joaquin, Melrose, Patroon, Shelbyville, Martinsville, Bland Lake, Neuville, Appleby, Chireno, Hurstown, James, Jericho, Calgary, Stockman, Arcadia and Jordans Store. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3146 9450 3171 9464 3197 9405 3164 9386 TIME...MOT...LOC 0415Z 245DEG 39KT 3164 9445 44
Special weather statement, Apr 30, 12:04 AM CDT, 35 minutes before
Special Weather Statement
National Weather Service Shreveport LA
1204 AM CDT Fri Apr 30 2021
LAZ010-017-TXZ153-300545-
De Soto LA-Sabine LA-Shelby TX-
1204 AM CDT Fri Apr 30 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL DE SOTO...
NORTHWESTERN SABINE PARISHES IN NORTHWESTERN LOUISIANA AND EASTERN
SHELBY COUNTIES UNTIL 1245 AM CDT...
At 1204 AM CDT, Doppler radar was tracking a strong thunderstorm near
Shelbyville, or 9 miles southeast of Center, moving east at 45 mph.
Penny size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Center, Converse, Patroon, Shelbyville, Oak Grove, Pleasant Hill,
Huxley, Noble, Hurstown, James, Belmont, Pelican, Toledo Bend
Reservoir North and Jordans Store.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3162 9409 3162 9411 3183 9420 3199 9358
3168 9348 3159 9403
TIME...MOT...LOC 0504Z 254DEG 40KT 3171 9404
44Special weather statement, Apr 30, 12:39 AM CDT, 0 minutes before
Special Weather Statement National Weather Service Shreveport LA 1239 AM CDT Fri Apr 30 2021 LAZ017-TXZ153-166-167-300630- Sabine LA-Sabine TX-San Augustine TX-Shelby TX- 1239 AM CDT Fri Apr 30 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SABINE PARISH... SOUTHEASTERN SHELBY...NORTHEASTERN SAN AUGUSTINE AND NORTHWESTERN SABINE COUNTIES UNTIL 130 AM CDT... At 1238 AM CDT, Doppler radar was tracking a strong thunderstorm near Bland Lake, or 15 miles south of Center, moving east at 40 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Milam, San Augustine, Bland Lake, Neuville, Patroon, Huxley, Hurstown, Denning, Sexton, Calgary, Toledo Bend Reservoir North and Jordans Store. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3146 9427 3167 9431 3177 9375 3149 9369 TIME...MOT...LOC 0538Z 260DEG 36KT 3157 9420 44
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 11:15 PM CDT | Special Weather Statement | SHV | Shelby | 45 min |
| Apr 30, 12:04 AM CDT | Special Weather Statement | SHV | Shelby | 41 min |
| Apr 30, 1:24 AM CDT | Special Weather Statement | SHV | Sabine | 51 min |
| Apr 30, 3:28 AM CDT | Areal Flood Advisory | SHV | Angelina, Cherokee, Nacogdoches, Sabine, San Augustine, Shelby | 3 hr |
| Apr 30, 4:11 AM CDT | Flash Flood Warning | SHV | Angelina, Cherokee, Nacogdoches, San Augustine, Shelby | 3 hr |
| Apr 30, 5:10 AM CDT | River Flood Warning | SHV | Nacogdoches, Rusk, San Augustine, Shelby | 46 days |
| Apr 30, 5:12 AM CDT | River Flood Warning | SHV | Sabine, San Augustine | 40 hr |
| Apr 30, 5:14 AM CDT | River Flood Warning | SHV | Angelina, Houston, Polk, Trinity, Tyler | 51 days |
| Apr 30, 6:22 AM CDT | Areal Flood Advisory | SHV | Angelina, Nacogdoches, Sabine, San Augustine | 113 min |
| Apr 30, 7:18 AM CDT | River Flood Warning | SHV | Anderson, Cherokee, Houston, Trinity | 13 hr |
| Apr 30, 9:39 AM CDT | River Flood Warning | SHV | Bowie, Red River | 25 hr |
| Apr 30, 2:10 AM CDT | Special Weather Statement | SHV | Natchitoches | 50 min |
Nearby
Special Weather Statements in Texas, 2021Every special weather statement 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.