685
FXUS64 KLIX 202326 AAA
AFDLIX
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE NEW ORLEANS LA
626 PM CDT THU AUG 20 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 613 PM CDT THU AUG 20 2026
- DANGEROUS HEAT CONTINUES WITH AFTERNOON HEAT INDICES IN THE
105-113 DEGREE RANGE THROUGH THE WEEK. WARM OVERNIGHT
TEMPERATURES WILL OFFER LIMITED TO NO RELIEF.
- ISOLATED TO SCATTERED AFTERNOON STORMS ARE EXPECTED THE NEXT
COUPLE DAYS WITH A LITTLE BETTER COVERAGE FRIDAY AFTERNOON AND
EVENING.
SHORT TERM
(NOW THROUGH SUNDAY)
ISSUED AT 1116 AM CDT THU AUG 20 2026
TONIGHT THROUGH THE WEEKEND, UPPER LEVEL RIDGING WILL REMAIN IN
PLACE OVER THE AREA. SOUTHERLY SURFACE WINDS WILL CONTINUE TO HELP
ADVECT WARM AIR AND MOISTURE INTO THE AREA, INCREASING THE
HUMIDITY. SCATTERED AFTERNOON SHOWERS/STORMS WILL BE EXPECTED,
ESPECIALLY FRIDAY AND SATURDAY AFTERNOON/EARLY EVENING AS A SLIGHT
WEAKNESS INFLUENCES THE AREA, ENHANCING RAINFALL CHANCES DURING
PEAK DAYTIME HEATING HOURS. THESE STORMS WILL HAVE THE POTENTIAL
FOR FREQUENT LIGHTNING AND GUSTY SUBSEVERE WINDS (40-50MPH). THESE
STORMS ARE NOT EXPECTED TO BE SEVERE.
THE HEAT CONTINUES WITH FRIDAY EXPECTED TO BE THE HOTTEST OUT OF
THE NEXT COUPLE OF DAYS. HIGH IN THE MID TO UPPER 90S COMBINED
WITH HEAT INDEX VALUES IN THE 107-115 DEGREES RANGE WILL BE QUITE
DANGEROUS. AN EXTREME HEAT WARNING IS IN EFFECT FOR FRIDAY DURING
PEAK DAYTIME HEATING HOURS. HEAT ADVISORIES WILL LIKELY BE NEEDED
SATURDAY AND SUNDAY, DEPENDING ON THE CLOUD COVER. MSW
LONG TERM
(SUNDAY NIGHT THROUGH WEDNESDAY)
ISSUED AT 1116 AM CDT THU AUG 20 2026
HIGH PRESSURE CONTINUES TO BUILD OVER THE AREA FOR THE START OF
THE WORKWEEK. SOUTHERLY SURFACE WINDS WILL CONTINUE TO ADVECT WARM
AND MOIST AIR INTO THE REGION. CONDITIONS WILL BE QUITE DRY
OVERALL FOR THE BEGINNING OF NEXT WEEK WITH POPS LESS THAN 10-20%
FOR THE LONG TERM FORECAST. AN ISOLATED SHOWER/STORM WILL BE
POSSIBLE DAILY DURING PEAK HEATING HOURS IN THE AFTERNOON/EVENING.
THE MAIN RISK WITH THIS WOULD BE FREQUENT LIGHTNING AND GUSTY
WINDS (30-50MPH) IF A STORM DOES OCCUR. THE HEAT WILL CONTINUE AS
WELL WITH HIGHS IN THE MID TO UPPER 90S AND HEAT INDEX VALUES IN
THE 105-110 DEGREE RANGE. SO, BE SURE TO STAY HYDRATED AND TAKE
FREQUENT BREAKS IF SPENDING TIME OUTDOORS. MSW
AVIATION
(00Z TAFS)
ISSUED AT 626 PM CDT THU AUG 20 2026
OUTSIDE OF PERHAPS SOME DECAYING CONVECTION NEAR GPT, MOSTLY VFR
CONDITIONS ACROSS THE REGION THIS EVENING AND OVERNIGHT. THESE
CONDITIONS WILL LIKELY CONTINUE INTO THE DAY ON FRIDAY, HOWEVER,
CONVECTION CHANCES TOWARD THE END OF THE CYCLE INCREASE A BIT.
WITH CONVECTION EXPECT MVFR OR BRIEFLY LOWER CONDITIONS IN THE
HEAVIER ACTIVITY. WITH ANY THUNDERSTORMS ON FRIDAY WINDS WILL
LIKELY BE GUSTY SO ADDED HIGHER GUSTS IN WITH THE PROB30S. OUTSIDE
OF CONVECTION, WINDS WILL REMAIN SOUTHWESTERLY GENERALLY LESS THAN
10 KNOTS. (FRYE)
MARINE
ISSUED AT 1116 AM CDT THU AUG 20 2026
SURFACE HIGH PRESSURE CENTERED OVER THE CENTRAL GULF WILL MAINTAIN A
GENERALLY WEAK PRESSURE GRADIENT THROUGH MUCH OF THE PERIOD. A
PREDOMINANTLY WESTERLY FLOW WILL CONTINUE, WITH HIGHER WINDS DURING
THE EARLY MORNING AND LATE NIGHT HOURS. ISOLATED THUNDERSTORMS WILL
REMAIN POSSIBLE WITH WINDS AND WAVES HIGHER IN AND NEAR THIS
ACTIVITY, PARTICULARLY DURING THE OVERNIGHT AND EARLY MORNING
HOURS.
LIX WATCHES/WARNINGS/ADVISORIES
LA...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR LAZ034>037-039-
046>048-056>058-064-070-071-076>087-089>100.
EXTREME HEAT WARNING FROM 11 AM TO 8 PM CDT FRIDAY FOR
LAZ034>037-039-046>048-056>058-064-070-071-076>087-089>100.
GM...NONE.
MS...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR MSZ068>071-077-
083>088.
EXTREME HEAT WARNING FROM 11 AM TO 8 PM CDT FRIDAY FOR
MSZ068>071-077-083>088.
GM...NONE.
SHORT TERM...MSW
LONG TERM....MSW
AVIATION...RDF
MARINE...MSW
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