594
FXUS64 KBRO 180338
AFDBRO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1038 PM CDT MON AUG 17 2026
..NEW DISCUSSION, MARINE
KEY MESSAGES
UPDATED AT 1034 PM CDT MON AUG 17 2026
- HOT, DRY, AND AT TIMES BREEZY CONDITIONS WILL CONTINUE THROUGH THE
WEEK AND INTO THE WEEKEND.
- 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.
- THERE IS A POTENTIAL OF ELEVATED FIRE WEATHER CONDITIONS ACROSS
THE RIO GRANDE PLAINS AND PORTIONS OF THE NORTHERN RANCHLANDS.
DISCUSSION
ISSUED AT 1034 PM CDT MON AUG 17 2026
A MID-LEVEL RIDGE OVER THE FOUR CORNERS EXTENDING OVER TEXAS WILL
PROVIDE SUBSIDENCE ACROSS THE REGION THROUGH LATE WEEK AND INTO THE
WEEKEND. THEREFORE, HOT AND RAIN-FREE CONDITIONS ARE FORECAST TO CONTINUE
THROUGH PERIOD. DAILY HIGH TEMPERATURES ARE EXPECTED TO RANGE FROM
THE THE UPPER 90S TO AROUND 105 DEGREES, EXCEPT NEAR THE COAST. THE
COMBINATION OF HOT TEMPERATURES AND ELEVATED DEWPOINTS IN THE 70S
WILL SUPPORT HEAT INDICES GENERALLY BETWEEN 105 TO 110 DEGREES
EACH AFTERNOON. HEAT INDICES MAY BRIEFLY REACH 111+ AT A FEW
LOCATIONS IN THE AFTERNOON, ESPECIALLY THURSDAY AND FRIDAY.
WIDESPREAD MODERATE (LEVEL 2 OF 4) TO MAJOR (LEVEL 3 OF 4) HEAT
RISK EXPECTED THROUGH LATE WEEK INTO THE WEEKEND. SPECIAL WEATHER
STATEMENTS (SPS) AND MAYBE A HEAT ADVISORY WILL BE NEEDED LATER
THIS WEEK FOR PORTIONS OF THE AREA, ESPECIALLY NEAR THE COAST.
THE HOT, DRY, AND AT TIMES BREEZY CONDITIONS WILL SUPPORT THE
POTENTIAL INCREASE OF FIRE WEATHER CONCERNS THROUGH THE WEEKEND.
MINIMUM RELATIVE HUMIDITY BELOW 30 PERCENT IS EXPECTED EACH
AFTERNOON, MAINLY ALONG AND WEST OF I-69C/US 281.
AVIATION
(00Z TAFS)
ISSUED AT 620 PM CDT MON AUG 17 2026
MODERATE SOUTHEAST WINDS PREVAIL ACROSS DEEP SOUTH TEXAS EARLY
THIS EVENING. WINDS ARE EXPECTED TO GRADUALLY DECREASE LATER THIS
EVENING AND OVERNIGHT. SOUTHEAST WINDS WILL INCREASE AND BECOME
MODERATE AND GUSTY MID TO LATE MORNING. SOME GUSTS AROUND 25 KNOTS
WILL BE POSSIBLE IN THE AFTERNOON. VFR CONDITIONS ARE EXPECTED FOR
THE NEXT 24 HOURS.
MARINE
ISSUED AT 1034 PM CDT MON AUG 17 2026
GENERALLY FAVORABLE MARINE CONDITIONS WILL PREVAIL ALONG THE
LOWER TEXAS COAST THROUGH THE PERIOD WITH LIGHT TO MODERATE WINDS
AND LOW TO MODERATE SEAS. HOWEVER, WINDS MAY INCREASE OVER THE
LAGUNA MADRE MID TO LATE WEEK, WHICH COULD REQUIRE SMALL CRAFT
SHOULD EXERCISE CAUTION AT TIMES.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 96 79 97 79 / 30 10 0 0
HARLINGEN 98 76 101 75 / 30 10 0 0
MCALLEN 101 79 103 79 / 30 10 0 0
RIO GRANDE CITY 102 78 103 76 / 20 10 0 0
SOUTH PADRE ISLAND 89 80 89 81 / 20 10 0 0
BAYVIEW/PORT ISABEL 94 78 96 78 / 20 10 0 0
BRO WATCHES/WARNINGS/ADVISORIES
TX...NONE.
GM...NONE.
SHORT TERM...63-KC
LONG TERM....63-KC
AVIATION...63-KC
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page