Alert archive / Louisiana / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 180, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Jul 29, 2018, 4:51 PM CDT for Caldwell Parish, Grant Parish, LaSalle Parish, Louisiana. It was in force for 54 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 29, 2018, 4:51 PM CDT (21:51 UTC)
- Expired
- Jul 29, 2018, 5:45 PM CDT
- In force
- 54 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Caldwell Parish, LA, Grant Parish, LA, LaSalle Parish, LA
The radar
The Ft Polk radar (KPOE), 97 km from the middle of the area, began a volume at 21:54 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
Shreveport, LA (KBAD), launched 12:00Z, 9.9 hours before the alert went out and 158 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
- 662 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1046 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 111 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 29, 4:42 PM CDT, 9 minutes earlier.
Area forecast discussion, Jul 29, 4:42 PM CDT, 9 minutes before
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</html>Hazardous weather outlook, Jul 29, 11:53 AM CDT, 4 hours 58 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 1153 AM CDT Sun Jul 29 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>167-301700- 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- 1153 AM CDT Sun Jul 29 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... A band of developing showers and thunderstorms was slowly advancing southward across the Interstate 30 corridor. With daytime heating these storms will likely intensify, with periods of heavy rainfall possible, in addition to frequent deadly lightning and strong gusty winds with stronger storms as they continue to move southward across the Interstate 20 corridor later this afternoon and into at least the early evening. .DAYS TWO THROUGH SEVEN...Monday through Saturday... Showers and thunderstorms will become numerous late in the day Monday but especially Monday Night into early Tuesday as an upper level trough moves into our region from the north and west. Again, some of these storms could be strong with isolated severe thunderstorms also possible as a cold front moves into the region. Locally heavy rainfall, frequent deadly lightning, and very strong gusty winds can be expected in stronger storms. Thunderstorms should end across Northeast and East Central Louisiana by Tuesday Evening with milder temperatures and drier weather by the middle of the upcoming work week. Temperatures will moderate by the end of the work week into the upcoming weekend with a return to widely scattered afternoon and evening thunderstorms. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters are not anticipated later this afternoon or evening but isolated strong to severe thunderstorms will be possible later this afternoon and evening. 07
In the hours before
Local storm report, Jul 29, 3:17 PM CDT, 1 hour 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
317 PM CDT SUN JUL 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0235 PM TSTM WND DMG HAUGHTON 32.53N 93.50W
07/29/2018 BOSSIER LA LAW ENFORCEMENT
TREES AND LIMBS DOWN IN, AND AROUND,
HAUGHTON. SWEPCO IS REPORTING POWER OUTAGES
IN THE CITY AS WELL.
&&
ABDLocal storm report, Jul 29, 3:19 PM CDT, 1 hour 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
319 PM CDT SUN JUL 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0218 PM TSTM WND DMG BENTON 32.70N 93.74W
07/29/2018 BOSSIER LA LAW ENFORCEMENT
TREES AND LIMBS DOWN IN THE BENTON AREA.
&&
ABDSpecial weather statement, Jul 29, 3:24 PM CDT, 1 hour 27 minutes before
Special Weather Statement
National Weather Service Shreveport LA
324 PM CDT SUN JUL 29 2018
LAZ001-002-010>012-017-018-TXZ151-153-166-167-292115-
De Soto LA-Bossier LA-Bienville LA-Natchitoches LA-Red River LA-
Caddo LA-Sabine LA-Sabine TX-Panola TX-San Augustine TX-Shelby TX-
324 PM CDT SUN JUL 29 2018
...SIGNIFICANT WEATHER ADVISORY FOR DE SOTO...RED RIVER...WEST
CENTRAL NATCHITOCHES...SOUTHEASTERN CADDO...WEST CENTRAL BIENVILLE...
SOUTHEASTERN BOSSIER AND NORTHERN SABINE PARISHES...SOUTHEASTERN
PANOLA...SHELBY...NORTHEASTERN SAN AUGUSTINE AND NORTHWESTERN SABINE
COUNTIES UNTIL 415 PM CDT...
At 321 PM CDT, Doppler radar was tracking a strong thunderstorm 13
miles east of Converse. Additional scattered strong storms
developing along a fast moving outflow boundary moving south across
the area. The storms were moving south at 25 mph.
Winds in excess of 40 mph will be possible with these storms and
outflow boundary.
Locations impacted include...
Center, Mansfield, Milam, Many, San Augustine, Coushatta, Stonewall,
Zwolle, Logansport, Tenaha, Timpson, Joaquin, Converse, Shelbyville,
Patroon, Bland Lake, Neuville, Allen, Oak Grove and Pleasant Hill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
These storms 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.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Shreveport.
&&
LAT...LON 3215 9408 3239 9336 3169 9317 3152 9356
3142 9399 3191 9448
TIME...MOT...LOC 2021Z 347DEG 5KT 3182 9348
07Local storm report, Jul 29, 3:44 PM CDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
344 PM CDT SUN JUL 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0221 PM TSTM WND DMG HOMER 32.79N 93.05W
07/29/2018 CLAIBORNE LA LAW ENFORCEMENT
LARGE TREE DOWN IN HOMER.
&&
ABDLocal storm report, Jul 29, 3:57 PM CDT, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
357 PM CDT SUN JUL 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0310 PM TSTM WND DMG STONEWALL 32.27N 93.82W
07/29/2018 DE SOTO LA LAW ENFORCEMENT
REPORTS OF TWO TREES DOWN IN STONEWALL.
&&
ABDSpecial weather statement, Jul 29, 4:20 PM CDT, 31 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 |
|---|---|---|---|---|
| Jul 29, 12:36 PM CDT | Special Weather Statement | SHV | Wood | 54 min |
| Jul 29, 12:40 PM CDT | Special Weather Statement | SHV | Cass | 50 min |
| Jul 29, 1:13 PM CDT | Severe Thunderstorm Warning | SHV | Cass, Marion | 62 min |
| Jul 29, 2:41 PM CDT | Special Weather Statement | SHV | Harrison, Panola | 64 min |
| Jul 29, 3:24 PM CDT | Special Weather Statement | SHV | Shelby | 51 min |
| Jul 29, 4:08 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, Rusk, Sabine, San Augustine, Shelby | 52 min |
| Jul 29, 5:07 PM CDT | Special Weather Statement | SHV | San Augustine | 53 min |
| Jul 29, 5:47 PM CDT | Special Weather Statement | SHV | Angelina | 43 min |
| Jul 29, 1:35 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Claiborne, Webster | 40 min |
| Jul 29, 1:59 PM CDT | Special Weather Statement | SHV | Caddo | 61 min |
| Jul 29, 2:06 PM CDT | Severe Thunderstorm Warning | SHV | Bossier | 39 min |
| Jul 29, 2:21 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Caddo, De Soto, Red River | 39 min |
| Jul 29, 2:38 PM CDT | Special Weather Statement | SHV | Bienville, Jackson, Lincoln, Ouachita, Union | 67 min |
| Jul 29, 3:06 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo, De Soto, Red River | 39 min |
| Jul 29, 3:32 PM CDT | Severe Thunderstorm Warning | SHV | Lincoln, Ouachita, Union | 43 min |
| Jul 29, 3:46 PM CDT | Severe Thunderstorm Warning | SHV | De Soto, Grant, Jackson, Natchitoches, Red River, Sabine and 1 more | 59 min |
| Jul 29, 4:20 PM CDT | Special Weather Statement | SHV | Caldwell, Ouachita | 55 min |
| Jul 29, 4:29 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Ouachita, Union | 61 min |
Nearby
Severe 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.