519
FXUS64 KBRO 211848
AFDBRO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
148 PM CDT TUE APR 21 2026
..NEW DISCUSSION, MARINE
KEY MESSAGES
UPDATED AT 132 PM CDT TUE APR 21 2026
KEY MESSAGES:
* LIGHT, DRIZZLY RAIN SHOWERS TODAY.
* PREPARE FOR A DRASTIC CHANGE IN APPARENT TEMPERATURES THIS
WEEKEND COMPARED TO LAST, WITH WIDESPREAD "FEELS LIKE" TEMPS IN
THE TRIPLE DIGITS POSSIBLE.
DISCUSSION
ISSUED AT 132 PM CDT TUE APR 21 2026
LOW LEVEL SOUTHERLY FLOW BRINGING SCATTERED LIGHT RAIN PRIMARILY
EAST OF US-281 WILL DIMINISH THROUGH TODAY AS A LINGERING FRONTAL
BOUNDARY DEPARTS. MOSTLY CLOUDY TO OVERCAST SKIES WILL PERSIST
THROUGH MUCH OF THE DAY, IMPROVING INTO THE EVENING. SOME HIGH-RES
GUIDANCE SUGGESTS ELEVATED MOISTURE IN THE ATMOSPHERE WILL LEAVE
A CHANCE FOR STREAMER SHOWERS OVER THE WATERS AND NEAR THE COAST
TOMORROW MORNING. BEYOND THIS, DRY CONDITIONS PREVAIL INTO EARLY
NEXT WEEK.
STILL A BIT CHILLY TODAY UNDER CLOUD COVER, BUT TEMPERATURES SHOULD
SLOWLY INCREASE THROUGH THE WEEK. TOMORROW, EXPECT HIGHS AROUND
NORMAL. RIDGING WILL BUILD OVER WEST-CENTRAL MX THROUGH THE LATTER
HALF OF THE WEEK, BRINGING NORTHWESTERLY UPPER LEVEL FLOW AND DRY
AIR INTO THE UPPER LAYERS OF THE ATMOSPHERE. THIS, ALONG WITH
CLEARING SKIES, WILL ALLOW TEMPERATURES TO RISE INTO THE 90S BY
THE WEEKEND. CONTINUED SOUTHEASTERLY FLOW AT THE SURFACE WILL
BRING A DRASTIC CHANGE IN APPARENT TEMPERATURES COMPARED TO LAST
WEEKEND. THERE IS A MODERATE (LEVEL 2 OF 4) HEAT RISK THIS
WEEKEND, WITH REGION-WIDE TRIPLE DIGIT HEAT INDICES POSSIBLE
(EXCEPT ALONG THE IMMEDIATE COAST). TEMPERATURES IN THE UPPER 90S,
WITH "FEELS LIKE" TEMPS NEAR 110 ARE POSSIBLE IN THE UPPER RGV
AND ALONG THE US-77 CORRIDOR.
AT LOWER TEXAS BEACHES, THERE IS A MODERATE RISK OF RIP CURRENTS.
AROUND HIGH TIDE, WATER MAY RUN-UP NEAR THE DUNES AT NARROW
BEACHES. A COASTAL FLOOD STATEMENT WILL BE ALLOWED TO EXPIRE AT 2
PM TUESDAY; MAXIMUM OBSERVED WATER LEVELS REMAINED JUST SHY OF
MINOR FLOOD LEVELS, BUT BEACH WEBCAMS SHOW SOME NARROWING BEACHES.
ANOTHER MAY BE NEEDED TOMORROW. HIGH TIDE TOMORROW IS AT 12:18
PM.
AVIATION
(18Z TAFS)
ISSUED AT 1228 PM CDT TUE APR 21 2026
LIGHT RAIN SHOWERS MOVING NORTHWARD WILL CONTINUE PERIODS OF MVFR
THROUGH THE AFTERNOON. SHOWERS MOVING OVER A SITE MAY BRIEFLY
REDUCE CEILING CONDITIONS TO MVFR. THIS EVENING, SHOWERS DIMINISH
AND LEAVE A WINDOW FOR VFR. LOW CIGS RETURN AROUND MIDNIGHT,
BRINGING MVFR TO IFR CONDITIONS THROUGH THE MORNING.
MARINE
ISSUED AT 132 PM CDT TUE APR 21 2026
GENTLE TO MODERATE SOUTHEASTERLY FLOW UNDER A BENIGN PATTERN WILL
MAINTAIN 4-5 FT SEAS THROUGH THE WEEKEND. FOR THE REMAINDER OF TODAY
AND INTO TOMORROW, RAIN CHANCES OF 20% OR LESS WILL HANG AROUND,
WITH A CHANCE OF THUNDER. BRIEFLY GUSTY WINDS GREATER THAN 15 KTS
MAY BRING TEMPORARY SMALL CRAFT SHOULD EXERCISE CAUTION CONDITIONS
TODAY AND TOMORROW. EXPECT PRIMARILY DRY CONDITIONS FOR THE
LATTER HALF OF THE WEEK AND INTO THE WEEKEND.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 71 85 72 87 / 10 10 0 0
HARLINGEN 68 87 68 89 / 10 10 0 0
MCALLEN 72 90 72 92 / 10 10 0 0
RIO GRANDE CITY 70 90 70 93 / 10 0 0 0
SOUTH PADRE ISLAND 73 79 73 80 / 10 10 0 0
BAYVIEW/PORT ISABEL 70 84 70 85 / 10 10 0 0
BRO WATCHES/WARNINGS/ADVISORIES
TX...NONE.
GM...NONE.
SHORT TERM...69-HK
LONG TERM....69-HK
AVIATION...69-HK
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