402
FXUS64 KBRO 100546 AAA
AFDBRO
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1246 AM CDT THU SEP 10 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1229 AM CDT THU SEP 10 2026
- HOT, MAINLY DRY, AND AT TIMES BREEZY CONDITIONS WILL CONTINUE
THROUGH THE MIDDLE PARTS OF NEXT WEEK.
- WIDESPREAD MAJOR (LEVEL 3 OF 4) TO INCREASING AREAS OF EXTREME
(LEVEL 4 OF 4) HEAT RISK WILL CONTINUE THROUGH EARLY NEXT WEEK.
DISCUSSION
ISSUED AT 1012 PM CDT WED SEP 9 2026
HOT, MAINLY DRY, AND AT TIMES BREEZY CONDITIONS WILL CONTINUE TO BE
THE MAIN WEATHER STORYLINE THROUGH THE MIDDLE PARTS OF NEXT WEEK AS
AN ANOMALOUSLY STRONG AND ELONGATED 591-594 DAM HEAT RIDGE COMPLEX
REMAINS ANCHORED OVER THE SOUTHERN U.S. THIS PERSISTENT AND DOMINANT
FEATURE IN OUR PATTERN WILL CONTINUE TO FOSTER RECORD TO NEAR RECORD-
BREAKING HEAT IN THE DAYS AHEAD (SEE CLIMATE SECTION FOR MORE
DETAILS). HIGH TEMPERATURES ARE PROGGED TO CONTINUE TO CLIMB INTO
THE UPPER 90S TO MID 100S THROUGH THE FORECAST PERIOD WITH OVERNIGHT
LOWS IN THE 70S TO LOWER 80S. PEAK HEAT INDICES RANGING BETWEEN 105-
115F DEGREES WILL CONTINUE TO WARRANT DAY-TO-DAY OR NEAR DAILY
SPECIAL WEATHER STATEMENTS (SPSS) AND/OR HEAT ADVISORIES THROUGH
THIS WEEK. THE COMBINATION OF VERY HOT TEMPERATURES DURING THE DAY
AND VERY WARM TEMPERATURES AT NIGHT PROVIDING LITTLE RELIEF,
WIDESPREAD MAJOR (LEVEL 3 OF 4) HEAT RISK TO INCREASING AREAS OF
EXTREME (LEVEL 4 OF 4) HEAT RISK WILL BE THE CASE THROUGH THE MIDDLE
PARTS OF NEXT WEEK.
MEDIUM RANGE FORECAST MODELS ARE SIGNALING AT THE WEDNESDAY-THURSDAY
TIMEFRAME OF NEXT WEEK FOR OUR NEXT BEST AND MORE WIDESPREAD CHANCES
FOR SOME MUCH NEEDED RAINFALL IN THE FORM OF SHOWERS AND
THUNDERSTORMS.
AVIATION
(06Z TAFS)
ISSUED AT 1229 AM CDT THU SEP 10 2026
VFR CONDITIONS ARE FORECAST TO CONTINUE THROUGH THE PERIOD. LIGHT
AND VARIABLE WINDS ARE FORECAST OVERNIGHT, INCREASING OUT OF THE
SOUTHEAST THURSDAY AFTERNOON.
MARINE
ISSUED AT 1012 PM CDT WED SEP 9 2026
MARINE CONDITIONS WILL REMAIN FAVORABLE THROUGH THIS WEEK WITH LOW
TO MODERATE WINDS AND LOW SEAS (I.E. WAVE HEIGHTS BETWEEN 1-3 FEET).
MODERATE SEAS ARE EXPECTED TO DEVELOP OVER THE WEEKEND THROUGH THE
MIDDLE PARTS OF NEXT WEEK. SHOWER AND THUNDERSTORM CHANCES ARE ALSO
POSSIBLE DURING THE MIDDLE PARTS OF NEXT WEEK.
CLIMATE
ISSUED AT 1012 PM CDT WED SEP 9 2026
RECORD TO NEAR RECORD-BREAKING TEMPERATURES ARE POSSIBLE THROUGH AT
LEAST SATURDAY, COURTESY OF A PERSISTENT AND STRONG 591-594 DAM HEAT
RIDGE COMPLEX ESTABLISHED OVER THE SOUTHERN U.S. BELOW IS A LIST OF
THE RECORD HIGHS FROM THURSDAY SEPTEMBER 10TH TO SATURDAY SEPTEMBER
12TH.
THURSDAY SEPTEMBER 10, 2026:
BROWNSVILLE: 102F IN 2023
HARLINGEN: 102F IN 2023
MCALLEN: 105F IN 2023
FRIDAY SEPTEMBER 11, 2026:
BROWNSVILLE: 100F IN 1900 & 1893
HARLINGEN: 103F IN 1937
MCALLEN: 103F IN 2023
SATURDAY SEPTEMBER 12, 2026:
BROWNSVILLE: 100F IN 1919
HARLINGEN: 101F IN 2011 & 1930
MCALLEN: 103F IN 1987
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 98 81 98 82 / 10 0 0 0
HARLINGEN 101 77 101 78 / 20 10 0 0
MCALLEN 104 81 104 82 / 10 10 0 0
RIO GRANDE CITY 104 79 105 80 / 0 0 0 0
SOUTH PADRE ISLAND 90 83 90 83 / 10 0 0 0
BAYVIEW/PORT ISABEL 96 79 97 80 / 10 0 0 0
BRO WATCHES/WARNINGS/ADVISORIES
TX...NONE.
GM...NONE.
SHORT TERM...23
LONG TERM....23
AVIATION...60-BE
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