968
FXUS64 KLCH 290457
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1157 PM CDT TUE JUL 28 2026
..NEW AVIATION
KEY MESSAGES
- DANGEROUS HEAT CONTINUES WITH TEMPERATURES IN THE UPPER 90S TO
100S AND HEAT INDICES OF 105-110F.
- A HEAT ADVISORY IS IN EFFECT FOR AREAS EAST OF I-49 AND ALONG
THE ATCHAFALAYA.
- RAIN CHANCES AND SLIGHTLY COOLER TEMPERATURES ARRIVE LATE IN THE
WORK WEEK AND INTO THE WEEKEND.
DISCUSSION
(TONIGHT THROUGH NEXT TUESDAY)
ISSUED AT 1044 PM CDT TUE JUL 28 2026
BULK OF FORECAST CONSIDERATIONS TONIGHT WERE TAKEN IN BY HEAT
INDICES TOMORROW (WEDNESDAY.) THE PERSISTENCE FORECAST WILL
PREVAIL UNTIL TOMORROW WITH THE START OF A PATTERN CHANGE TAKING
PLACE SOMETIME THURSDAY. HIGH PRESSURE REGIME REMAINS IN PLACE,
AND IN FACT, MAY BE ENHANCED SOME ON WEDNESDAY. UPPER LOW PRESSURE
AND TROF DESCEND FROM THE NORTHEAST US, WHICH LAYS THE FRAMEWORK
FOR LATER WAVES TO ERODE UPPER HIGH PRESSURE. IN THE MEANTIME, IT
APPEARS THE TROF ONLY ACTS TO COMPRESS HIGH PRESSURE OVER THE
CENTRAL US, AND ULTIMATELY INCREASE HEIGHTS ON WEDNESDAY. WHILE
THIS WILL LIKELY RESULT IN SLIGHTLY HIGHER TEMPS WED, IT WILL ALSO
MEAN MIXING ONCE AGAIN. SINCE THE AIRMASS OVERTOP THE REGION MIXED
OUT QUICKLY BEFORE THOSE ADVISORY-CRITERIA INDICES REALLY SET IN,
IT MEANT THAT MOST OF THE REGION STAYED AT AND UNDER 108 TODAY.
SINCE THE SAME SCENARIO MAY PLAY OUT WED, THE BULK OF THE AREA
WAS LEFT OUT OF AN ADVISORY. THOSE IN ALEXANDRIA AND ALONG THE
ATCHAFALAYA MAY HIT 108 TO 110, EVEN WITH MIXING, SO THOSE AREAS
DID GET AN ADVISORY FOR THE DAY.
THERE IS THE PART OF THE SEABREEZE PUSHING IN DURING THE EARLY
AFTERNOON WHICH MAY POKE HEAT INDICES UP A SKOSH, BUT IF IT WAS
LIKE TODAY, EVEN THAT MOISTURE PLUME COULD BE MIXED DOWN QUICKLY.
UNLESS THERE IS A NOTABLE CHANGE IN PRESENTATION OR FORECAST
OVERNIGHT, THE ADVISORY WILL STAND AS-IS. BUT ADJUSTMENTS MAY COME
AS DEEMED NECESSARY.
HIGH PRESSURE WILL TRY TO HANG ON INTO THURSDAY WHICH MAY BRING
ABOUT THIS CONVERSATION AGAIN, BUT CONSIDERING THE INCREASE IN
MOISTURE THAT'S ANTICIPATED WITH THE APPROACHING EAST TROF, THERE
COULD BE ENOUGH CLOUD COVER TO TAMP TEMPS DOWN FROM THE NEEDED
HIGHS TO BRING ABOUT ADVISORY CRITERIA THURSDAY TO THE END OF THE
WEEK.
RESIDUAL HIGH WILL ALSO DEFLECT MAJORITY OF RAIN CHANCES TO THE
EAST UNTIL IT CAN BACK OFF SOMETIME LATER THURSDAY OR FRIDAY.
11/CALHOUN
AVIATION
(06Z TAFS)
ISSUED AT 1156 PM CDT TUE JUL 28 2026
HIGH PRESSURE AND DRY AIRMASS WILL DICATE CONDITIONS OVER THE
FORECAST PERIOD. VFR SKY CONDITIONS TO BE EXPECTED WITH VARIABLE
WINDS AS HIGH PRESSURE BEGINS MOVING NORTH AND WEST OF THE REGION
ON WEDNESDAY.
MARINE
ISSUED AT 1044 PM CDT TUE JUL 28 2026
LOW SEAS AND MODERATE ONSHORE WINDS WILL PREVAIL TO THE END OF THE
WORK WEEK AS HIGH PRESSURE LARGELY REMAINS IN CHARGE. HIGH
PRESSURE WILL BEGIN BACKING INTO CENTRAL TEXAS LATE THURSDAY INTO
FRIDAY, IGNITING A PRESSURE GRADIENT AND INCREASING EASTERLY
WINDS. THIS MAY RESULT IN A PERIOD OF SMALL CRAFT ADVISORY
CONDITIONS AND VERY LIKELY WILL SIGNAL THE RETURN OF SOME RAIN
CHANCES OVER COASTAL WATERS.
FIRE WEATHER
ISSUED AT 1044 PM CDT TUE JUL 28 2026
HIGH PRESSURE WILL HANG ON INTO WEDNESDAY AND LIKELY INTO MUCH OF
THURSDAY, CONTINUING THE ANOMALOUSLY HOT AND DRY PATTERN THESE
DAYS. DAYTIME RH MINIMUMS WILL VARY IN THE 45 TO 60 PERCENT RANGE
THROUGH THE END OF THE WEEK, INCREASING INTO THE WEEKEND WITH THE
RETURN OF RAIN CHANCES.
LCH WATCHES/WARNINGS/ADVISORIES
LA...HEAT ADVISORY FROM 10 AM TO 8 PM CDT WEDNESDAY FOR LAZ028-029-
033-045-055-153-154-254.
TX...NONE.
GM...NONE.
PUBLIC/FIRE/MARINE...11
AVIATION...11
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