704
FXUS64 KLCH 240520
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1220 AM CDT THU SEP 24 2026
..NEW DISCUSSION, AVIATION, MARINE, FIRE WEATHER
KEY MESSAGES
- A WEAK FRONTAL BOUNDARY WILL BRING DRIER AIR WITH LESS HUMID DAYS
AND LOWER NIGHTTIME TEMPERATURES THROUGH THE END OF THE WEEK.
- THE DRIER AIR MASS WILL ALSO BRING LIMITED RAIN CHANCES INTO THE
FIRST HALF OF THE WEEKEND.
- SOUTHERLY FLOW AND MOISTURE INCREASES BY LATE IN THE WEEKEND AND
EARLY NEXT WEEK WITH HOT DAYTIME TEMPERATURES ABOVE SEASONAL
NORMS, ALONG WITH A RETURN OF RAIN CHANCES.
DISCUSSION
(TODAY THROUGH WEDNESDAY)
ISSUED AT 1215 AM CDT THU SEP 24 2026
THE COMBINATION OF A SURFACE HIGH BUILDING IN FROM THE NORTHEAST
BEHIND A WEEK BOUNDARY AND AN UPPER LEVEL RIDGE CENTERED OVER EAST
TEXAS WILL BRING A DRIER AIR MASS INTO THE REGION OVER THE NEXT
COUPLE OF DAYS. PWAT VALUES WILL BE BELOW 1.25 INCHES WITH LAYER
MEAN RELATIVE HUMIDITY VALUES BELOW 40 PERCENT. THIS WILL LIMIT ANY
SIGNIFICANT SHOWER ACTIVITY. HIGH TEMPERATURES WILL STILL BE ON THE
HOT SIDE FOR FALL AND ABOVE SEASONAL NORMS, HOWEVER IT WILL FEEL
LESS HUMID AND NIGHT TIME LOWS WILL BE LOWER.
OVER THE WEEKEND, THE SURFACE HIGH WILL MOVE OFF TO THE EAST AND
ALLOW A LIGHT FLOW TO RESUME OFF THE GULF INCREASING MOISTURE AND
HUMIDITY. MEANWHILE, THE UPPER LEVEL RIDGE WILL BREAK DOWN. THUS,
HOT AND HUMID CONDITIONS CAN BE EXPECTED WITH A CHANCE OF RAIN
RETURNING BY SUNDAY AND INCREASING ON MONDAY.
TOWARD THE END OF THE PERIOD, A NORTHERN STREAM SHORT WAVE WILL
DEEPEN OVER THE CENTRAL US AND MOVE TO THE EAST. SOUTHWEST FLOW
AHEAD OF THE SYSTEM WILL POSSIBLY PULL IN AND ENTRAIN SOME TROPICAL
MOISTURE FROM THE EAST PAC INTO IT. A DEVELOPING COLD FRONT WITH
THIS UPPER LEVEL TROUGH WILL WORK WITH THE INCREASING MOISTURE TO
BRING HIGHER RAIN CHANCES ON TUESDAY INTO WEDNESDAY.
07/RUA
AVIATION
(06Z TAFS)
ISSUED AT 1215 AM CDT THU SEP 24 2026
A WEAK FRONTAL BOUNDARY IS GRADUALLY MOVING ACROSS SOUTHWEST
LOUISIANA AND SOUTHEAST TEXAS OVERNIGHT. HIGH PRESSURE AT THE
SURFACE WILL BUILD IN BEHIND THE FRONT BRINGING DRIER AIR INTO THE
REGION. ALSO, AN UPPER LEVEL HIGH WILL BE BUILDING INTO THE REGION
THROUGH THE PERIOD. THE COMBINATION OF THE TWO WILL PROHIBITED
SIGNIFICANT CLOUD DEVELOPMENT WITH NO SHOWER ACTIVITY. ALSO, DRIER
AIR IN THE LOW LEVELS SHOULD KEEP ANY SIGNIFICANT FOG IN CHECK.
THEREFORE, VFR CONDITIONS EXPECTED THROUGH THURSDAY.
07/RUA
MARINE
ISSUED AT 1215 AM CDT THU SEP 24 2026
SURFACE HIGH PRESSURE BUILDING IN BEHIND A WEAK FRONTAL BOUNDARY
WILL BRING LIGHT TO MODEST EAST-NORTHEAST WINDS AND RELATIVELY LOW
SEAS THROUGH THE END OF THE WEEK. AS THE SURFACE HIGH MOVES OFF THE
EAST OVER THE WEEKEND, A LIGHT SOUTHEAST WIND FLOW WILL DEVELOP THAT
WILL PERSIST INTO EARLY NEXT WEEK. A DRIER AIR MASS WILL BRING LIMIT
CHANCES FOR SHOWERS INTO THE WEEKEND, BEFORE BETTER MOISTURE
RETURNS EARLY NEXT WEEK.
FIRE WEATHER
ISSUED AT 1215 AM CDT THU SEP 24 2026
EAST-NORTHEAST FLOW THROUGH THE END OF THE WEEK AS HIGH PRESSURE
BUILDS IN BEHIND A WEAK FRONTAL BOUNDARY. THE RESULT WILL BE A DRIER
AIR MASS WITH LESS HUMID DAYS AND SLIGHTLY COOLER NIGHT. THE MINIMUM
AFTERNOON RELATIVE HUMIDITY VALUES WILL RANGE FROM 35 TO 45 PERCENT.
MEANWHILE, THERE WILL BE LITTLE CHANCE FOR ANY SIGNIFICANT RAINFALL.
SOUTHERLY FLOW AND AN INCREASE IN MOISTURE RETURNS LATE IN THE
WEEKEND INTO EARLY NEXT WEEK.
LCH WATCHES/WARNINGS/ADVISORIES
LA...NONE.
TX...NONE.
GM...NONE.
PUBLIC/FIRE/MARINE...07
AVIATION...07
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page