065
FXUS64 KBRO 210328
AFDBRO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1028 PM CDT THU AUG 20 2026
..NEW DISCUSSION, MARINE
KEY MESSAGES
UPDATED AT 1025 PM CDT THU AUG 20 2026
- HOT AND RAIN-FREE CONDITIONS WILL CONTINUE THROUGH THE
MIDDLE OF NEXT WEEK.
- MODERATE (LEVEL 2 OF 4) TO MAJOR RISK (3 OF 4) OF HEAT-RELATED
IMPACTS THROUGH THE PERIOD WITH PEAK AFTERNOON HEAT INDICES
GENERALLY BETWEEN 105 TO AROUND 110 DEGREES.
- THE COMBINATION OF LOW MINIMUM RELATIVITY HUMIDITY VALUES, DRY FUELS,
AND VERY HOT TEMPERATURES COULD LEAD TO THE POTENTIAL FOR
RAPID WILDFIRE SPREAD THROUGH THE PERIOD.
DISCUSSION
ISSUED AT 1025 PM CDT THU AUG 20 2026
THE 500 MB RIDGE WILL MEANDER OVER THE FOUR CORNERS REGION
THROUGH THE MIDDLE OF NEXT WEEK. THIS WILL CONTINUE TO PROVIDE
STRONG SUBSIDENCE ACROSS DEEP SOUTH TEXAS WITH VERY HOT AND MAINLY
RAIN-FREE CONDITIONS THROUGH FORECAST PERIOD. DAILY HIGH TEMPERATURES
ARE EXPECTED TO REACH THE UPPER 90S TO AROUND 105 DEGREES, EXCEPT
NEAR THE COAST. THE COMBINATION OF THE VERY HOT TEMPERATURES AND
ELEVATED DEWPOINT TEMPERATURES 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, BUT TEMPERATURES
SHOULD REMAIN JUST BELOW HEAT ADVISORY CRITERIA EACH DAY. WIDESPREAD
MODERATE (LEVEL 2 OF 4) TO MAJOR (LEVEL 3 OF 4) HEAT RISK EXPECTED
THROUGH THE WEEKEND AND INTO THE MIDDLE OF NEXT WEEK.
THE COMBINATION OF LOW MINIMUM RELATIVITY HUMIDITY VALUES, DRY
FUELS, AND VERY HOT TEMPERATURES COULD LEAD TO THE POTENTIAL FOR
RAPID WILDFIRE SPREAD THROUGH THE PERIOD.
AVIATION
(00Z TAFS)
ISSUED AT 634 PM CDT THU AUG 20 2026
SOUTHEAST WINDS 15 TO 20 KTS WITH GUSTS AROUND 25 KTS 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 1025 PM CDT THU AUG 20 2026
A SLIGHTLY ENHANCED PRESSURE GRADIENT OVER THE WESTERN GULF MAY
PRODUCE SMALL CRAFT SHOULD EXERCISE CAUTION CONDITIONS ON THE LAGUNA
MADRE AT TIMES. OTHERWISE, MARINERS CAN EXPECT MODERATE SOUTH TO
SOUTHEAST WINDS AND SEAS OF 2 TO 3 FEET THROUGH THE PERIOD.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 98 81 98 80 / 0 0 0 0
HARLINGEN 101 78 103 75 / 0 0 0 0
MCALLEN 103 81 104 79 / 0 0 0 0
RIO GRANDE CITY 104 79 105 77 / 0 0 0 0
SOUTH PADRE ISLAND 90 82 90 81 / 0 0 0 0
BAYVIEW/PORT ISABEL 97 80 97 78 / 0 0 0 0
BRO WATCHES/WARNINGS/ADVISORIES
TX...NONE.
GM...NONE.
SHORT TERM...63-KC
LONG TERM....63-KC
AVIATION...63-KC
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