A weak frontal boundary stalled along Interstate 10 during late August. The boundary helped spark numerous showers and storms with one producing flooding in Sulphur.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LCH wrote it up.
A weak frontal boundary stalled along Interstate 10 during late August. The boundary helped spark numerous showers and storms with one producing flooding in Sulphur.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Lake Charles, LA wrote its last area forecast discussion before the first event at Aug 30, 6:12 AM CST, 2 hours 42 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Lake Charles LA 712 AM CDT Sat Aug 30 2025 ...New AVIATION... .KEY MESSAGES... - Elevated rain chances continue through Sunday as a weak frontal boundary interacts with deep tropical moisture. - Storms will be capable of high rainfall rates that could lead to nuisance street flooding. - Below normal temperatures expected through much of next week as a series of weak frontal boundaries pushes through the region and reinforce a drier/cooler atmosphere. && .SHORT TERM... (Today through Monday night) Issued at 1210 AM CDT Sat Aug 30 2025 Outside of a few patches of drizzle, the radarscope is clear early this morning as a quasistationary frontal boundary continues to bisect the region roughly along the HWY 190 corridor. The latest several hours of CAMS guidance have performed poorly in showing significant convective redevelopment that has not yet materialized. A few isolated showers could develop over the next few hours, but the majority of activity doesn't seem likely to initialize until late this morning through this afternoon. Calm winds across the region may allow for some patchy early morning fog development especially across areas that saw significant rainfall yesterday. Parts of lower acadiana and southeast Louisiana are already reporting fog at this hour. Any fog that develops should dissipate by 14Z. The frontal boundary and deep tropical moisture in place across the region (2.19 PWAT on the 00Z KLCH sounding) will support another day of widespread thunderstorm development with any of these capable of high rainfall rates that could lead to nuisance street flooding. The entire region remains in WPC's marginal risk for excessive rainfall today through Monday. Convection should wane through the evening similar to Friday although a couple of storms could last into the late night. The boundary and the deepest moisture will ooze to the coast by Sunday keeping the highest PoPs confined to southeast Texas and coastal portions of southwest and south central Louisiana with only isolated storms possible as far north as Alexandria. Similar conditions expected Monday as the boundary remains stalled near the coast. Jones && .LONG TERM... (Tuesday through Saturday) Issued at 1210 AM CDT Sat Aug 30 2025 Another, more progressive, shortwave will swing through the area Tuesday pushing the stationary front further offshore and advecting in a slightly drier airmass. This will largely bring precipitation chances to an end by Wednesday. Another weak, reinforcing boundary pushes through the region Thursday. Dewpoints will fall into the mid to upper 60s Wednesday and Thursday allowing overnight lows to fall into the mid to upper 60s for the first time since June 1. Following the secondary frontal boundary Thursday, NBM advertises lower 60s across central Louisiana and interior parts of Southeast Texas which would be about 10 degrees below normal should it verify (although nowhere close to records which are in the mid 50s for the first week of September across cenla). Jones && .AVIATION... (12Z TAFS) Issued at 711 AM CDT Sat Aug 30 2025 Scattered to numerous showers and thunderstorms expected today due to boundary situated near the region. Expect periods of low CIGs, low VIS due to rainfall and volatile winds in and near storms. Conditions will improve with sundown. 11/Calhoun && .MARINE... Issued at 1210 AM CDT Sat Aug 30 2025 Scattered showers and storms will redevelop across the coastal waters today ahead of a meandering frontal boundary. This front will slide toward the coast later in the day where it will stall continuing to serve as a focus for storm development Sunday through Monday. Winds will turn offshore from Saturday afternoon through the middle of next week as the frontal boundary moves off the coast and into the Gulf waters. && .FIRE WEATHER... Issued at 1210 AM CDT Sat Aug 30 2025 Showers and thunderstorms will develop again today through Monday in response to a slowly advancing frontal boundary bisecting the region. The boundary will push through the area Saturday afternoon turning light winds out of the north through mid next week pulling some slightly drier air into the region Tuesday and Wednesday. A reinforcing frontal boundary will move through the region Thursday maintaining the drier air through the end of the week. && .PRELIMINARY POINT TEMPS/POPS... AEX 86 69 88 68 / 30 10 20 10 LCH 87 73 87 73 / 70 30 50 30 LFT 87 73 88 73 / 70 10 40 20 BPT 89 74 87 73 / 80 40 60 40 && .LCH WATCHES/WARNINGS/ADVISORIES... LA...None. TX...None. GM...None. && SHORT TERM...66 LONG TERM....66 AVIATION...11
Special Weather Statement
National Weather Service Lake Charles LA
602 AM CDT Sat Aug 30 2025
LAZ030-031-141-142-241-TXZ262-516-301200-
Southern Calcasieu LA-Allen LA-Beauregard LA-Northern Calcasieu LA-
Northern Jefferson Davis LA-Northern Orange TX-Southern Newton TX-
602 AM CDT Sat Aug 30 2025
...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN JEFFERSON DAVIS...
SOUTHERN BEAUREGARD...CALCASIEU AND SOUTHWESTERN ALLEN PARISHES...
SOUTH CENTRAL NEWTON AND NORTHEASTERN ORANGE COUNTIES THROUGH 700 AM
CDT...
At 602 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Longville to near Deweyville. Movement was
southeast at 10 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Lake Charles, Sulphur, Orange, Westlake, Vinton, Reeves, Singer,
Deweyville, Moss Bluff, De Quincy, Ragley, Lake Charles Regional
Airport, Starks, Fields, Lunita, Topsy, Hartburg, Toomey, Lebleu
Settlement, and Gillis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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.
&&
LAT...LON 3011 9370 3013 9370 3012 9373 3031 9384
3073 9336 3059 9290 3010 9314
TIME...MOT...LOC 1102Z 299DEG 10KT 3062 9326 3033 9371
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
CalhounSpecial Weather Statement
National Weather Service Lake Charles LA
718 AM CDT Sat Aug 30 2025
LAZ141-241-301245-
Southern Calcasieu LA-Northern Calcasieu LA-
718 AM CDT Sat Aug 30 2025
...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL CALCASIEU PARISH
THROUGH 745 AM CDT...
At 718 AM CDT, Doppler radar was tracking a strong thunderstorm over
Carlyss, or near Sulphur, moving east at 15 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Lake Charles, Sulphur, Westlake, Lake Charles Regional Airport, Moss
Bluff, and Carlyss.
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.
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 3010 9347 3022 9348 3028 9318 3005 9318
3005 9323
TIME...MOT...LOC 1218Z 271DEG 13KT 3014 9339
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
CalhounPreliminary Local Storm Report
National Weather Service Lake Charles LA
749 AM CDT Sat Aug 30 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0748 AM Flash Flood 1 N Sulphur 30.22N 93.38W
08/30/2025 Calcasieu LA Mesonet
Local mesonet site reports Bayou Dinde is
out of its banks.
&&
mkcThe Lake Charles radar (KLCH), 19 km away, was scanning. The volume nearest the first event began at 14:52 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain in Sulphur caused Bayou d'Inde to rise out of its banks. Street flooding affected a portion of the city as well after 5.67 fell in just over an hour. Three inches of water also flooded the gymnasium at Sulphur High School.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2025Every state in 2025This day in weather historyWarnings in Louisiana, August 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1289630.