537
FXUS64 KLCH 191720
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1220 PM CDT SAT SEP 19 2026
..NEW DISCUSSION, AVIATION, MARINE, FIRE WEATHER
KEY MESSAGES
- DEWPOINTS WILL INCREASE TONIGHT THROUGH SUNDAY.
- PRECIPITATION CHANCES WILL BE 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 AFTERNOON THROUGH NEXT FRIDAY)
ISSUED AT 1220 PM CDT SAT SEP 19 2026
A RIDGE, AT THE SURFACE AND ALOFT, IS OVER THE LOWER MISSISSIPPI
VALLY AND NORTHWEST GULF COAST THIS AFTERNOON. WHILE DEWPOINTS
HAVE INCREASED SLIGHTLY FROM 24HRS AGO, THE LOCAL AIRMASS REMAINS
FAIRLY DRY. TEMPERATURES ARE STILL FORECAST TO CLIMB INTO THE 90S
AREA THIS AFTERNOON, HOWEVER HEAT INDEX VALUES ARE FORECAST TO BE
ONLY SLIGHTLY HIGHER THAN ACTUAL TEMPS WITH THE LOWER DEWPOINTS.
THE SURFACE RIDGE WILL SLIP EAST THROUGH TONIGHT WHICH WILL TURN
THE FLOW BACK ONSHORE ALLOWING DEWPOINTS TO INCREASE ONCE AGAIN.
PWAT VALUES WILL ALSO CLIMB TO AROUND 2" BY MONDAY AFTERNOON.
EVEN WITH THE INCREASE IN MOISTURE, THE UPPER RIDGE WILL REMAIN IN
PLACE KEEPING CHANCES OF RAIN SUPPRESSED. HOWEVER, AN ISOLATED
SHOWER AND STORM WILL BE POSSIBLE LATE TONIGHT/EARLY SUNDAY ALONG
THE COAST AND ADDITIONAL DIURNAL STORMS MAY RETURN BY SUNDAY AND
MONDAY AFTERNOONS, BUT MAINLY ALONG THE SEA BREEZE ALONG THE SOUTH
OF I-10.
THE RIDGE ALOFT WILL ERODE TUESDAY AS A SHORT WAVE MOVES ACROSS
THE UPPER PLAINS, HOWEVER RAIN CHANCES WILL REMAIN FAIRLY LIMITED.
THE OFFICIAL FORECAST IS INDICATING ISOLATED STORMS AT BEST BY
TUE AFTERNOON, HOWEVER CHANCES MAY INCREASE IN FUTURE FORECASTS. A
WEAK COLD FRONT MY MOVE INTO THE REGION LATE TUESDAY OR EARLY
WEDNESDAY WITH SHOWERS AND STORMS BECOMING POSSIBLE ALONG THE
BOUNDARY.
A DRIER AIRMASS MAY FILTER BACK INTO THE REGION BY LATE WEEK.
AVIATION
(18Z TAFS)
ISSUED AT 1220 PM CDT SAT SEP 19 2026
MOSTLY VFR CONDITIONS ARE ANTICIPATED THROUGH THE PERIOD, HOWEVER
PATCHY AND THIN BR MAY BE POSSIBLE EARLY SUNDAY. WINDS WILL BE
LIGHT AND GENERALLY EAST TO SOUTHEAST.
MARINE
ISSUED AT 1220 PM CDT SAT SEP 19 2026
LIGHT EAST TO SOUTHEAST WINDS AND LOW SEAS WILL EXIST ACROSS THE
COASTAL WATERS THROUGH TUESDAY. A WEAK FRONTAL BOUNDARY MAY MOVE
INTO THE COASTAL WATERS WEDNESDAY BRIEFLY SWITCHING WINDS
OFFSHORE AND INCREASING RAIN CHANCES.
FIRE WEATHER
ISSUED AT 1220 PM CDT SAT SEP 19 2026
MIN RH VALUES OF MID 30S TO MID 40S ARE ANTICIPATED THIS
AFTERNOON, HOWEVER MOISTURE LEVELS WILL INCREASE SUNDAY AND MONDAY
AS AN ONSHORE FLOW BECOMES ESTABLISHED.
LCH WATCHES/WARNINGS/ADVISORIES
LA...NONE.
TX...NONE.
GM...NONE.
PUBLIC/FIRE/MARINE...05
AVIATION...05
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