634
FXUS64 KLCH 172333
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
633 PM CDT THU SEP 17 2026
..NEW AVIATION
KEY MESSAGES
- DRIER AIR WILL REMAIN ACROSS THE REGION, TONIGHT THROUGH
SATURDAY WHICH WILL KEEP HEAT INDICES BELOW ADVISORY CRITERIA.
HIGH TEMPERATURES WILL STILL RANGE 5-10 DEGREES ABOVE
CLIMATOLOGICAL NORMS FOR THE END OF SUMMER.
- PRECIPITATION CHANCES INCREASE SUNDAY INTO EARLY NEXT WEEK, AS
AN AREA OF LOW PRESSURE MOVES INTO THE NORTHEASTERN GULF.
DISCUSSION
(THIS AFTERNOON THROUGH NEXT WEDNESDAY)
ISSUED AT 1243 PM CDT THU SEP 17 2026
A RIDGE IS CENTERED OVER ARKANSAS THIS AFTERNOON WHILE A DRIER
AIRMASS IS FORCED ALONG THE EASTERN AND SOUTHERN PERIPHERY. PWATS
ARE FALLING ACROSS THE LOCAL AREA WITH THE DEEPEST MOISTURE, AND
HIGHER RAIN CHANCES, SHIFTING INTO THE CENTRAL TEXAS COAST AND
EXTREME NORTHWEST GULF. TEMPERATURES ARE STILL RUN ABOVE CLIMO
NORMS FOR MID SEPTEMBER, HOWEVER DEWPOINTS ARE SLOWLY FALLING
WHICH IS KEEPING THE HEAT INDEX VALUES LOWER THAN OVER THE PAST
FEW DAYS.
THE DRIER AIRMASS WILL CONTINUE TO FILTER IN THROUGH TONIGHT AND
INTO FRIDAY. MORNING LOWS WILL BE NEAR CLIMO NORMS FOR THE DATE
WHICH WILL BE IN THE UPPER 60S TO MID 70S. DEWPOINTS FRIDAY
AFTERNOON MAY FALL INTO THE LOW TO MID 60S ACROSS INTERIOR
LOCATIONS WHICH WILL PRODUCE RHS IN THE 30S. WHILE NOT EXACTLY
LOW OR COOL, AT LEAST ITS HINT THAT FALL IS NOT FAR AWAY. HIGH
TEMPERATURES, HOWEVER, WILL STILL RUN 5-10 ABOVE CLIMO NORMS FRI
AND SAT.
SUNDAY INTO MONDAY THE RIDGE ALOFT WILL WEAKEN AND HIGHER
MOISTURE LEVELS WILL MOVE BACK IN. MODEST RAIN CHANCES WILL
RETURN SUNDAY AFTERNOON INTO EARLY NEXT WEEK.
AVIATION
(00Z TAFS)
ISSUED AT 630 PM CDT THU SEP 17 2026
VFR CONDITIONS TO PREVAIL PAST THE END OF THE FORECAST PERIOD
WITH LIGHT WINDS GENERALLY OUT OF THE SE TO E AND MOSTLY UPPER SCT
TO SKC CIGS.
86/87
MARINE
ISSUED AT 1243 PM CDT THU SEP 17 2026
A FAIRLY TIGHT PRESSURE GRADIENT WILL EXIST ACROSS THE COASTAL
WATERS THROUGH THE EVENING BEHIND A WEAK BOUNDARY. AN SCA WILL
REMAIN IN EFFECT FOR A PORTION OF THE MARINE ZONE THROUGH 6Z.
WINDS WILL RELAX INTO THE WEEKEND.
FIRE WEATHER
ISSUED AT 1243 PM CDT THU SEP 17 2026
A DRY AIRMASS WILL MOVE ACROSS THE REGION THROUGH SATURDAY.
MINIMUM RH VALUES WILL FALL INTO THE 30S TO MID 40 ACROSS MOST
INTERIOR LOCATIONS BOTH FRIDAY AND SATURDAY AFTERNOONS. MOISTURE
WILL INCREASE ONCE AGAIN SUNDAY INTO MONDAY.
LCH WATCHES/WARNINGS/ADVISORIES
LA...NONE.
TX...NONE.
GM...SMALL CRAFT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR GMZ450-470.
SMALL CRAFT ADVISORY UNTIL 1 AM CDT FRIDAY FOR GMZ452-455-472-
475.
PUBLIC/FIRE/MARINE...05
AVIATION...86
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