429
FXUS64 KLCH 271119
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
619 AM CDT MON JUL 27 2026
..NEW AVIATION
KEY MESSAGES
- DANGEROUS HEAT IS EXPECTED THIS WEEK WITH TEMPERATURES IN THE
UPPER 90S TO 100S AND HEAT INDICES OF 106-110F.
- A HEAT ADVISORY IS IN AFFECT TODAY FOR THE EASTERN PARTS OF THE
FORECAST AREA. WITH FURTHER ADVISORIES LIKELY THROUGH THE WEEK.
- LATER IN THE WEEK, UPPER RIDGING BEGINS TO LOSE ITS CONTROL
OVERHEAD, ALLOWING TEMPS TO MODERATE SLIGHTLY AND RAIN CHANCES
TO RETURN TO THE FORECAST.
DISCUSSION
(TODAY THROUGH SUNDAY)
ISSUED AT 1205 AM CDT MON JUL 27 2026
A SIGNIFICANT UPPER LEVEL RIDGE EXTENDING FROM CALIFORNIA TO THE
SOUTHEASTERN US WILL CONTINUE TO DOMINATE THE SYNOPTIC WEATHER
PATTERN THROUGH THE NEXT FEW DAYS, RESULTING IN A REPETITIVE
FORECAST OF HOT AND DRY CONDITIONS. TODAY, HIGHS WILL REACH INTO THE
MID TO UPPER 90S WHILE HEAT INDICES WILL TOP OUT IN THE MID TO UPPER
100S THROUGH THE AFTERNOON. AS A RESULT, A HEAT ADVISORY HAS BEEN
ISSUED FOR THOSE PARISHES ALONG I-49 AND INTO LOWER ACADIANA FROM
NOON THROUGH 7PM TODAY. ELSEWHERE, HEAT INDICES WILL NEAR THE 108
MARK IN A FEW LOCATIONS HOWEVER, MOST AREAS ARE EXPECTED TO REMAIN
BELOW ADVISORY CRITERIA. TOMORROW AND WEDNESDAY, MUCH OF THE SAME
SWELTERING HEAT IS EXPECTED, WITH MORE HEAT ADVISORIES LIKELY TO BE
ISSUED, POSSIBLY AREA-WIDE. WITH RIDGING ALOFT MAINTAINING CONTROL,
NO RAINFALL IS EXPECTED THROUGH WEDNESDAY.
THURSDAY INTO THE WEEKEND, UPPER RIDGING BEGINS TO WEAKEN SLIGHTLY
AND RETREAT WESTWARD, BECOMING CENTERED MORE OVER THE FOUR CORNERS
REGION. IN ITS PLACE, A STRONG UPPER TROUGH BECOMES CARVED OUT
ACROSS THE EASTERN SEABOARD THROUGH THE END OF THE WORK WEEK. AS THE
RIDGE LOSES SOME INFLUENCE OVER THE CWA, SMALL RAIN CHANCES BEGIN
TO RETURN TO THE FORECAST PARTICULARLY ACROSS THE EASTERN HALF OF
THE REGION THURS THROUGH SAT. IN ADDITION, SLIGHTLY BETTER RAIN
CHANCES AND MORE CLOUD COVER WILL KEEP TEMPS IN CHECK SOMEWHAT
THROUGH THE END OF THE WEEK, MAINLY KEEPING US OUT OF HEAT
ADVISORY TERRITORY. MOVING INTO NEXT WEEKEND, THE INITIAL E CONUS
RIDGE WILL BE EJECTING OFF INTO THE ATLANTIC, WHILE A NORTHERN
STREAM SHORTWAVE LOOKS TO DIVE ACROSS THE GREAT LAKES AND DROP
SOUTHWARD, CARVING OUT ANOTHER TROUGH ACROSS THE E CONUS AROUND
THE END OF THE FORECAST PERIOD. THIS WILL BRING A LARGER SCALE
WEAKNESS OVERHEAD ALOFT AND IN TURN A FURTHER UPTICK IN RAIN
CHANCES LATER IN THE WEEKEND.
AVIATION
(12Z TAFS)
ISSUED AT 618 AM CDT MON JUL 27 2026
HIGH PRESSURE AT THE SURFACE AND ALOFT WILL KEEP ANY SIGNIFICANT
CONVECTION FROM DEVELOPING TODAY WITH JUST THE POTENTIAL OF
SCATTERED FAIR WEATHER CU IN THE AFTERNOON. OTHERWISE, VFR
CONDITIONS EXPECTED WITH LIGHT WEST TO SOUTHWEST WINDS.
07/RUA
MARINE
ISSUED AT 1205 AM CDT MON JUL 27 2026
LIGHT ONSHORE WINDS AND CALM SEAS WILL CONTINUE FOR THE NEXT FIVE
DAYS. RAIN CHANCES WILL RETURN ON THURSDAY.
FIRE WEATHER
ISSUED AT 1205 AM CDT MON JUL 27 2026
HOT AND DRY WEATHER WILL CONTINUE WELL INTO THE WORK WEEK. RAIN
CHANCES WILL BE NEAR ZERO UNTIL THURSDAY. MINRH WILL BE BETWEEN 40
AND 60 PERCENT THROUGH NEXT FRIDAY WITH RH RECOVERY AROUND 90%.
LCH WATCHES/WARNINGS/ADVISORIES
LA...HEAT ADVISORY FROM NOON TODAY TO 8 PM CDT THIS EVENING FOR
LAZ028-029-032-033-044-045-055-143-152>154-243-252>254.
TX...NONE.
GM...NONE.
PUBLIC/FIRE/MARINE...17
AVIATION...07
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