Alert archive / Texas / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 169, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Jul 12, 2018, 2:29 PM CDT for Cass County, Texas. It was in force for 46 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
- Jul 12, 2018, 2:29 PM CDT (19:29 UTC)
- Expired
- Jul 12, 2018, 3:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Cass County, TX
The radar
The Shreveport radar (KSHV), 84 km from the middle of the area, began a volume at 19:31 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
Fort Worth, TX (KFWD), launched 12:00Z, 7.5 hours before the alert went out and 276 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
- 522 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 1509 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- -17 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 Jul 12, 1:48 PM CDT, 41 minutes earlier.
Area forecast discussion, Jul 12, 1:48 PM CDT, 41 minutes before
<!doctype html>
<html lang="en">
<head>
<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.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Jul 12, 11:49 AM CDT, 2 hours 40 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 1149 AM CDT Thu Jul 12 2018 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-131700- 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- 1149 AM CDT Thu Jul 12 2018 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...This Afternoon and Tonight... Isolated showers and thunderstorms can be expected during the morning followed by scattered convection this afternoon. Some of these thunderstorms will have the potential of becoming strong to possibly severe, with damaging wind gusts, locally heavy rainfall, and deadly lightning. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... Expect scattered showers and thunderstorms to continue throughout the remainder of this work week as a series of disturbances progress from east to west across the Gulf Coast region. Isolated strong to severe storms with damaging wind gusts, locally heavy rainfall, and deadly lightning remain possible. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters will not be required through tonight. 05
In the hours before
Special weather statement, Jul 12, 12:12 PM CDT, 2 hours 17 minutes before
Special Weather Statement National Weather Service Shreveport LA 1212 PM CDT THU JUL 12 2018 LAZ001-002-010-011-121800- De Soto LA-Bossier LA-Red River LA-Caddo LA- 1212 PM CDT THU JUL 12 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL DE SOTO... NORTHWESTERN RED RIVER...SOUTHEASTERN CADDO AND SOUTH CENTRAL BOSSIER PARISHES UNTIL 100 PM CDT... At 1211 PM CDT, Doppler radar was tracking a strong thunderstorm 9 miles southeast of Stonewall, or 11 miles north of Mansfield, moving north at 10 mph. Dime size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Shreveport, Stonewall, Frierson, Caspiana, Elm Grove, Robson, Mc Dade, Kingston and Reeds 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. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 3211 9358 3212 9379 3239 9384 3237 9350 TIME...MOT...LOC 1711Z 183DEG 8KT 3220 9368 05
Special weather statement, Jul 12, 2:23 PM CDT, 6 minutes before
Special Weather Statement National Weather Service Shreveport LA 223 PM CDT THU JUL 12 2018 LAZ010-TXZ151-153-122000- De Soto LA-Panola TX-Shelby TX- 223 PM CDT THU JUL 12 2018 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL DE SOTO PARISH... SOUTHEASTERN PANOLA AND NORTH CENTRAL SHELBY COUNTIES UNTIL 300 PM CDT... At 222 PM CDT, Doppler radar was tracking a strong thunderstorm over Joaquin, or 16 miles northeast of Center, moving west at 10 mph. Dime size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Logansport, Tenaha, Joaquin, Woods and Paxton. LAT...LON 3210 9397 3192 9396 3186 9424 3213 9426 TIME...MOT...LOC 1922Z 086DEG 8KT 3201 9406 05
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:23 PM CDT | Special Weather Statement | SHV | Shelby | 37 min |
| Jul 12, 2:51 PM CDT | Special Weather Statement | SHV | Nacogdoches | 24 min |
| Jul 12, 4:02 PM CDT | Special Weather Statement | SHV | Smith | 43 min |
| Jul 12, 4:24 PM CDT | Special Weather Statement | SHV | Franklin, Red River | 51 min |
| Jul 12, 4:37 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Smith | 53 min |
| Jul 12, 5:49 PM CDT | Special Weather Statement | SHV | Sabine | 41 min |
| Jul 12, 6:43 PM CDT | Special Weather Statement | SHV | Sabine | 32 min |
| Jul 12, 12:12 PM CDT | Special Weather Statement | SHV | De Soto | 48 min |
| Jul 12, 1:10 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo, Webster | 42 min |
| Jul 12, 5:09 PM CDT | Special Weather Statement | SHV | Sabine | 51 min |
| Jul 11, 7:01 PM CDT | Special Weather Statement | SHV | Howard | 44 min |
| Jul 11, 8:41 PM CDT | Special Weather Statement | SHV | Little River | 34 min |
Nearby
Severe Thunderstorm Warnings in Texas, 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.