Heat Advisory 21, NWS Lake Charles, LA

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Newton County, TX, Orange County, TX, Tyler County, TX

879 
WWUS74 KLCH 241548
NPWLCH

URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
1048 AM CDT Mon Aug 24 2026

LAZ027>033-044-045-055-073-074-141>143-152>154-241>243-252>254-
TXZ180-201-259>262-515-516-615-616-250100-
/O.CON.KLCH.HT.Y.0021.260824T1600Z-260825T0100Z/
Vernon-Rapides-Avoyelles-Beauregard-Allen-Evangeline-St. Landry-
Lafayette-Upper St. Martin-Lower St. Martin-West Cameron-East
Cameron-Northern Calcasieu-Northern Jefferson Davis-Northern
Acadia-Upper Vermilion-Upper Iberia-Upper St. Mary-Southern
Calcasieu-Southern Jefferson Davis-Southern Acadia-Lower
Vermilion-Lower Iberia-Lower St. Mary-Tyler-Hardin-Northern
Jasper-Northern Newton-Southern Jasper-Southern Newton-Upper
Jefferson-Northern Orange-Lower Jefferson-Southern Orange-
Including the cities of Meaux, Ivanhoe, Bundick Lake, Opelousas,
Oakdale, Pickering, Jamestown, Kirbyville, China, Hillister,
Cottonport, Topsy, Effie, Westlake, Crowley, Branch, Rutherford
Beach, Cameron, Woodville, Leesville, St. Martinville, Hathaway,
Reddell, St. Landry, Bleakwood, Morse, Spurger, Orange, Kaplan,
Lawtell, Cypremort Point, Jeanerette, Buna, Bayou Vista, Alexandria,
Mansura, Vinton, Jennings, Avery Island, Nederland, Carlyss, Bridge
City, Silsbee, Fort Polk, Sabine Pass, Grand Chenier, Lumberton,
Creole, Kinder, Deweyville, Intracoastal City, Iowa, Fields,
Marksville, Morgan City, Forked Island, Bell City, Vidor,
Mauriceville, Grand Lake, Farrsville, Simmesport, Burkeville, Lake
Arthur, Lake Charles, Hayes, Holly Springs, Franklin, Mamou, Evadale,
Moss Bluff, Beaver, Johnson Bayou,
Rayne, Eunice, Gist, Mt. Union, Maurice, Centerville, Jasper,
Patterson, Beaumont, Call, Church Point, Burns Point, Oretta, Fenton,
Hackberry, Fred, De Quincy, Newton, Iota, De Ridder, Stephensville,
Klondike, Sulphur, Slagle, Bunkie, Warren, Lafayette, Ville Platte,
Port Arthur, Breaux Bridge, Wiergate, Town Bluff, Elton, Abbeville,
Roganville, New Iberia, Cade, Sea Rim State Park, Berwick, Welsh,
Magnolia Springs, Pineville, and Gueydan
1048 AM CDT Mon Aug 24 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* WHAT...Heat index values up to 109 expected.

* WHERE...Portions of central, south central, southwest, and west
  central Louisiana and southeast Texas.

* WHEN...Until 8 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

&&

$$

CK

Area Forecast Discussion
National Weather Service Lake Charles LA
639 AM CDT Sun Aug 23 2026

...New AVIATION...

.KEY MESSAGES...

- A Heat Advisory is in effect again today from 11 AM until 8 PM.
  Afternoon highs will again climb to near 100 degrees with
  maximum apparent temperatures ranging from 109 to 115.

- Temperatures will remain above normal through Tuesday before
  returning nearer to normal through the second half of the week.

- A few afternoon thunderstorms are expected each day, but the
  majority of the region will remain dry through Wednesday.
  Precipitation chances will increase Thursday into next weekend.

&&

.DISCUSSION...
(Today through Saturday)
Issued at 1212 AM CDT Sun Aug 23 2026

After breaking daily high temperature records Saturday afternoon
at both the Lake Charles and Beaumont airports, dewpoints in the
upper 70s to 80 are keeping apparent temperatures even at midnight
in the mid 90s to near 100. It does make one wonder how the pre
electrical world managed to subsist in the gulf south in August.

Little change in the synoptic forecast pattern is expected today or
Monday as a broad upper level ridge continues to dominate the
south central U.S. keeping both high and low temperatures above
normal even by mid August standards. No changes were made to the
previously issued heat advisory which will again be in effect
today from 11 AM until 8 PM. Forecast maximum heat indices are
expected to range from 109-115 posing a health risk to anyone
unable to find sufficient sources of cooling.

Short range guidance is in good agreement on the combination of
heat related instability and a developing afternoon sea breeze
producing a few (20-30%) thunderstorms this afternoon and those
lucky enough to find themselves underneath one will get a brief
reprieve from both the heat as well as the expanding drought
across the region. Any storms that develop will dissipate around
sunset.

Increasing mid level moisture will wrap around the eastern
periphery of the ridge Monday through Wednesday offering better
(30- 50%) precipitation chances for those along and east of the
Atchafalaya basin. The remainder of the region will continue to
broil in the Cajun sauna with heat advisories likely needed each
afternoon.

The persistent upper level ridge will retrograde west into the four
corners region by Thursday allowing deeper upper level moisture to
sink into the area along a weak boundary. This is expected to
substantially increase (30-70%) precipitation chances across the
region while, concordantly, dropping afternoon highs back to "only"
the low to mid 90s.

Jones

&&

.AVIATION...
(12Z TAFS)
Issued at 636 AM CDT Sun Aug 23 2026

With exception to some patchy morning fog, VFR conditions ongoing
this morning. Fog will burn off shortly after sunrise. Otherwise,
we could see a few diurnal showers and storms later this afternoon
and into this evening.

&&

.MARINE...
Issued at 1212 AM CDT Sun Aug 23 2026

Light onshore winds will persist through the week with seas
ranging from 1-2 feet. Precipitation chances return across the
coastal waters Thursday into next weekend.

&&

.FIRE WEATHER...
Issued at 1212 AM CDT Sun Aug 23 2026

A few afternoon thunderstorms will develop each day
through Wednesday with the highest probabilities in and around the
Atchafalaya basin. Better precipitation chances are expected area
wide Thursday through next weekend.

KBDI values presently range from 530 to 750 across the region and will
continue climbing as drought conditions worsen over the next
couple of weeks. Daily minimum relative humidity will range from
40-50% away from the immediate coastline through the middle of the
week. Personal outdoor burning is strongly discouraged. Burn bans
have been issued for most parishes and counties by local governments.
Consult your local fire departments for more information.

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...Heat Advisory from 11 AM this morning to 8 PM CDT this evening
     for LAZ027>033-044-045-055-073-074-141>143-152>154-241>243-
     252>254.

TX...Heat Advisory from 11 AM this morning to 8 PM CDT this evening
     for TXZ180-201-259>262-515-516-615-616.

GM...None.
&&

PUBLIC/FIRE/MARINE...66
AVIATION...87