374
FXUS64 KLCH 182341
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
641 PM CDT FRI SEP 18 2026
..NEW AVIATION
KEY MESSAGES
- DRIER AIR TODAY AND SATURDAY WILL KEEP MAXIMUM HEAT INDEX VALUES
IN CHECK ALTHOUGH AFTERNOON HIGHS WILL REMAIN IN THE MID TO UPPER
90S. DEWPOINTS WILL INCREASE AGAIN SUNDAY.
- PRECIPITATION CHANCES WILL BE NEAR ZERO THIS WEEKEND AND VERY LOW
THROUGH NEXT WEEK AS HIGH PRESSURE REMAINS CENTERED NEARLY OVERHEAD
- A WEAK "FRONTAL" BOUNDARY WILL BRING SOME DRIER AIR BACK INTO THE
REGION WEDNESDAY THROUGH LATE NEXT WEEK.
DISCUSSION
(THIS EVENING THROUGH NEXT THURSDAY)
ISSUED AT 104 PM CDT FRI SEP 18 2026
NOTICEABLY DRIER AIR ALLOWED MORNING LOWS TO FALL INTO
THE MID TO UPPER 60S ACROSS CENTRAL LOUISIANA AND INTERIOR SOUTHEAST
TEXAS THIS MORNING AND NEAR 70 ALONG THE I-10 CORRIDOR. WHILE NOT
EXACTLY FALL LIKE, IT WAS A WELCOME RELIEF TO NOT STEP OUTSIDE AND
IMMEDIATELY FEEL LIKE WE JUST JUMPED INTO A LAKE. DEWPOINTS WILL
REMAIN IN THE 60S THROUGH THE DAY TODAY KEEPING APPARENT TEMPERATURES
IN CHECK, BUT UPPER LEVEL RIDGING CENTERED ACROSS MUCH OF THE SOUTH
CENTRAL U.S. WILL PREVENT BOTH PRECIPITATION AND MUCH AFTERNOON
CLOUD COVER ALLOWING AFTERNOON HIGHS TO CLIMB INTO THE MID TO UPPER
90S. THE LOWER DEWPOINTS SHOULD AGAIN ALLOW TEMPERATURES TO FALL
INTO THE UPPER 60S TO AROUND 70 SATURDAY MORNING BEFORE AGAIN
QUICKLY CLIMBING INTO THE MID TO UPPER 90S SATURDAY AFTERNOON.
DEWPOINTS WILL SLOWLY INCREASE INTO THE LOW TO MID 70S SUNDAY IN
RESPONSE TO MOISTURE ASSOCIATED WITH AN UPPER LEVEL DISTURBANCE OVER
THE NORTHEASTERN GULF OOZING INTO LOUISIANA FROM THE EAST. DESPITE
THE INCREASING MOISTURE, UPPER LEVEL RIDGING OVERHEAD WILL CONTINUE
TO SUPPRESS CONVECTION THROUGH EARLY NEXT WEEK KEEPING PRECIPITATION
CHANCES LIMITED TO 20-30% AT BEST EACH AFTERNOON.
ANOTHER WEAK "FRONTAL" BOUNDARY, MORE AKIN TO A DRYLINE, IS EXPECTED
TO PUSH THROUGH THE REGION LATE WEDNESDAY BRINGING, PERHAPS, EVEN
DRIER AIR THAN IS CURRENTLY BEING OBSERVED AND BRINGING BOTH HIGH
AND LOW TEMPERATURES DOWN A COUPLE OF DEGREES IN THE PROCESS. WE'LL
SEE HOW MODELS HANDLE THIS AIRMASS HEADING INTO EARLY NEXT WEEK AS
GUIDANCE OFTEN OVER DRAMATIZES THESE CHANGES IN AIRMASS EARLY IN THE
CHANGING SEASONS, BUT HOPE SPRINGS ETERNAL.
JONES
AVIATION
(00Z TAFS)
ISSUED AT 639 PM CDT FRI SEP 18 2026
VFR CONDITIONS PREVAIL THROUGH THE TAF PERIOD WITH LIGHT VARIABLE
WINDS EXPECTED.
MARINE
ISSUED AT 104 PM CDT FRI SEP 18 2026
LIGHT EAST TO SOUTHEASTERLY WINDS AND LOW SEAS WILL PREVAIL
THROUGH TUESDAY ALONG WITH VERY LOW PRECIPITATION CHANCES AS HIGH
PRESSURE REMAINS IN PLACE ACROSS THE NORTHERN GULF. A WEAK FRONTAL
BOUNDARY WILL PUSH THROUGH THE COASTAL WATERS WEDNESDAY WITH BREEZY
NORTHEASTERLY WINDS DEVELOPING IN IT'S WAKE.
FIRE WEATHER
ISSUED AT 104 PM CDT FRI SEP 18 2026
DRIER AIR WILL REMAIN IN PLACE ACROSS THE REGION
THROUGH SATURDAY WITH MINIMUM RH VALUES RANGING FROM 30-40% AWAY
FROM THE IMMEDIATE COAST BOTH THIS AND SATURDAY AFTERNOONS. MOISTURE
WILL INCREASE ONCE AGAIN SUNDAY INTO MONDAY.
THE LATEST DROUGHT MAP HAS A ONE CLASS DEGRADATION ACROSS SWLA AND
PARTS OF LOWER ACADIANA. WITH LITTLE TO NO RAINFALL EXPECTED THROUGH
THE PERIOD, IT WILL NOT BE OUT OF THE REALM OF POSSIBILITY TO SEE
ANOTHER CLASS DEGRADATION NEXT WEEK.
LCH WATCHES/WARNINGS/ADVISORIES
LA...NONE.
TX...NONE.
GM...NONE.
PUBLIC/FIRE/MARINE...66
AVIATION...86
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