066
FXUS64 KBRO 201716
AFDBRO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1216 PM CDT THU AUG 20 2026
..NEW DISCUSSION, AVIATION, MARINE
KEY MESSAGES
UPDATED AT 1208 PM CDT THU AUG 20 2026
- HOT AND DRY CONDITIONS WILL CONTINUE THROUGH THE FORECAST PERIOD.
- MODERATE (LEVEL 2 OF 4) TO MAJOR RISK (3 OF 4) OF HEAT-RELATED IMPACTS
THROUGH THE WEEKEND WITH PEAK AFTERNOON HEAT INDICES GENERALLY
BETWEEN 105 TO AROUND 110 DEGREES.
- THE COMBINATION OF BREEZY AND MOSTLY DRY WEATHER COINCIDING
WITH LOW AFTERNOON MINIMUM RELATIVE HUMIDITY VALUES BRINGS A
CONTINUED RISK OF FIRE WEATHER INTO NEXT WEEK.
DISCUSSION
ISSUED AT 1208 PM CDT THU AUG 20 2026
UPPER LEVEL RIDGING WILL CONTINUE TO LEAD TO HOT TEMPERATURES AND
DRY CONDITIONS ACROSS DEEP SOUTH TEXAS THROUGH THIS WEEK INTO NEXT.
TEMPERATURES EACH DAY WILL RISE INTO THE UPPER 90S (CLOSER TO THE
COAST) TO LOW 100S WITH HEAT INDICES BETWEEN 105-110F EXPECTED.
WE CONTINUE TO REMAIN JUST SHY OF HEAT ADVISORY CRITERIA EACH DAY
BUT A FEW LOCATIONS MAY BRIEFLY EXCEED 111F. WILL CONTINUE TO
MONITOR FOR THE NEED OF HEAT ADVISORIES. THERE IS A MODERATE
(LEVEL 2 OF 4) TO MAJOR (LEVEL 3 OF 4) HEAT RISK EVERY AFTERNOON
INTO NEXT WEEK.
WHILE DRY CONDITIONS WILL PREVAIL, CAN NOT RULE OUT VERY ISOLATED
SEA BREEZE ACTIVITY THROUGH THE REMAINDER OF THE PERIOD, THOUGH
CHANCES REMAIN LESS THAN 5%.
BREEZY CONDITIONS WILL CONTINUE THIS WEEK. WINDS IN COMBINATION
WITH LOWER RH VALUE AND ABNORMALLY DRY CONDITIONS COULD LEAD TO
THE POTENTIAL FOR RAPID WILDFIRE SPREAD IF IGNITION OCCURS. WHILE
WE SHY OF AND RED FLAG WARNINGS OR FIRE DANGER STATEMENTS,
OUTDOOR BURNING IS NOT RECOMMENDED.
AVIATION
(18Z TAFS)
ISSUED AT 1208 PM CDT THU AUG 20 2026
VFR CONDITIONS WILL PREVAIL AT ALL AERODROMES. GUSTY
SOUTHEASTERLY WINDS WILL CONTINUE THROUGH THIS EVENING WITH GUSTS
TO AROUND 25 KTS.
MARINE
ISSUED AT 1208 PM CDT THU AUG 20 2026
AN ENHANCED PRESSURE GRADIENT ALONG THE IMMEDIATE COAST EACH DAY WILL
RESULT IN SMALL CRAFT EXERCISE CAUTION CONDITIONS AT TIMES,
PRIMARILY ACROSS THE LAGUNA MADRE. OTHERWISE, EXPECT LIGHT TO
MODERATE SOUTHEASTERLY WINDS WITH 2 TO 3 FT SEAS AND 4 TO 6 SECOND
PERIODS.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 81 98 80 99 / 0 0 0 0
HARLINGEN 78 103 75 103 / 0 0 0 0
MCALLEN 81 104 79 105 / 0 0 0 0
RIO GRANDE CITY 79 105 77 105 / 0 0 0 0
SOUTH PADRE ISLAND 82 90 81 90 / 0 0 0 0
BAYVIEW/PORT ISABEL 80 97 78 98 / 0 0 0 0
BRO WATCHES/WARNINGS/ADVISORIES
TX...NONE.
GM...NONE.
SHORT TERM...68-AM
LONG TERM....68-AM
AVIATION...68-AM
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