694
FXUS64 KBRO 041712
AFDBRO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1212 PM CDT TUE AUG 4 2026
..NEW DISCUSSION, AVIATION, MARINE
KEY MESSAGES
UPDATED AT 1204 PM CDT TUE AUG 4 2026
- HEAT INDICES BETWEEN 105-110F ARE EXPECTED EACH DAY, POTENTIALLY HIGHER.
HEAT ADVISORIES MAY BE NEEDED.
- MODERATE (LEVEL 2 OUT OF 4) TO MAJOR (LEVEL 3 OUT OF 4) HEAT
RISK WILL CONTINUE THROUGH THURSDAY.
- LOW CHANCE OF ISOLATED SHOWERS AND THUNDERSTORMS ALONG THE SEA
BREEZE EACH AFTERNOON, MAINLY LATE WEEK THROUGH THE WEEKEND.
DISCUSSION
ISSUED AT 1204 PM CDT TUE AUG 4 2026
HOT TEMPERATURES WILL CONTINUE PLAGUE DEEP SOUTH TEXAS AND THE RIO
GRANDE VALLEY THROUGH THE FORECAST PERIOD AS HIGH PRESSURE REMAINS
OVER THE SOUTHWESTERN US. TEMPERATURES EACH DAY WILL RISE INTO THE
UPPER 90S TO LOW 100S WITH HEAT INDICES BETWEEN 105-110F
EXPECTED. WHILE WE LOOK TO REMAIN JUST SHY OF HEAT ADVISORY
CRITERIA EACH DAY, A FEW LOCATIONS MAY BRIEFLY EXCEED 111F. THERE
IS A MODERATE (LEVEL 2 OF 4) TO MAJOR (LEVEL 3 OF 4) HEAT RISK
EVERY AFTERNOON THROUGH THURSDAY.
DRY CONDITIONS WILL PREVAIL THROUGH MUCH OF THE PERIOD. WITH THAT
SAID, THERE DOES REMAIN A LOW CHANCE (LESS THAN 20%) OF AN
ISOLATED SHOWER OR THUNDERSTORMS EACH AFTERNOON ALONG THE
SEABREEZE, MAINLY LATE WEEK INTO THE WEEKEND. ANY SHOWERS OR
THUNDERSTORMS THAT DO DEVELOP COULD PRODUCE GUSTY WINDS,
LIGHTNING, AND BRIEF HEAVY RAINFALL.
AVIATION
(18Z TAFS)
ISSUED AT 1204 PM CDT TUE AUG 4 2026
VFR CONDITIONS WILL PREVAIL AT ALL AERODROMES. SOUTHEASTERLY WINDS
WILL GUST TO AROUND 25 KTS THROUGH THIS AFTERNOON BEFORE
DECREASING THIS EVENING AND OVERNIGHT.
MARINE
ISSUED AT 1204 PM CDT TUE AUG 4 2026
AN ENHANCED PRESSURE GRADIENT ALONG THE IMMEDIATE COAST COULD
RESULT IN PERIODIC SMALL CRAFT EXERCISE CAUTION CONDITIONS ALONG
THE LAGUNA MADRE. OTHERWISE, EXPECT LIGHT TO MODERATE
SOUTHEASTERLY WINDS WITH 2 TO 3 FT SEAS AND 5 TO 6 SECOND PERIODS.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 81 96 81 97 / 0 0 10 10
HARLINGEN 78 99 78 100 / 0 0 0 10
MCALLEN 81 102 81 102 / 0 0 0 10
RIO GRANDE CITY 79 102 79 103 / 0 0 0 10
SOUTH PADRE ISLAND 81 89 81 89 / 0 0 10 10
BAYVIEW/PORT ISABEL 80 95 79 96 / 0 0 0 10
BRO WATCHES/WARNINGS/ADVISORIES
TX...NONE.
GM...NONE.
SHORT TERM...68-AM
LONG TERM....68-AM
AVIATION...68-AM
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