Sunrise 6:58 AM   Sunset 7:59 PM Moonrise 6:58 PM   Moonset 5:41 AM

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GMZ130 Laguna Madre From The Port Of Brownsville To The Arroyo Colorado- Laguna Madre From The Arroyo Colorado To 5 Nm North Of Port Mansfield Tx- Laguna Madre From 5 Nm North Of Port Mansfield To Baffin Bay Tx- 339 Am Cdt Tue Apr 23 2024
Today - Southeast winds 5 to 10 knots increasing to around 15 knots this afternoon. A moderate chop on the bay becoming choppy this afternoon. Tonight - Southeast winds 10 to 15 knots. A moderate chop on the bay. Wednesday - Southeast winds 10 to 15 knots. A moderate chop on the bay. Wednesday night - Southeast winds 10 to 15 knots. A moderate chop on the bay. Thursday - Southeast winds 15 to 20 knots increasing to 20 to 25 knots with gusts up to 35 knots in the afternoon. Choppy on the bay becoming rough in the afternoon. Thursday night - Southeast winds 20 to 25 knots with gusts up to 35 knots. Rough on the bay. Friday - Southeast winds 20 to 25 knots with gusts up to 35 knots. Rough on the bay. Friday night - Southeast winds around 20 knots with gusts up to 30 knots. Rough on the bay. Saturday - Southeast winds around 20 knots with gusts up to 30 knots. Rough on the bay. Saturday night - Southeast winds 15 to 20 knots with gusts up to 30 knots. Choppy on the bay.

GMZ100 339 Am Cdt Tue Apr 23 2024
Synopsis -
onshore flow will begin to develop by tonight as high pressure slowly moves eastward. Onshore flow will then increase by Wednesday into Thursday as the overall pressure gradient strengthens.

FXUS64 KBRO 230746 AFDBRO

Area Forecast Discussion National Weather Service Brownsville TX 246 AM CDT Tue Apr 23 2024

New SHORT TERM, LONG TERM, MARINE

SHORT TERM
(Today through Wednesday)
Issued at 244 AM CDT Tue Apr 23 2024

Mid-level ridging over Mexico will build into Deep South Texas providing subsidence through the period. At the surface, high pressure across the northern Gulf of Mexico will continue to slide eastward through Wednesday. Easterly winds early this morning will become southeasterly later this morning into the afternoon. The warm southeasterly flow will allow temperatures to reach the low to mid 80s across much of the area today under mostly cloudy skies. Mostly cloudy skies will continue tonight with lows falling into the upper 60s to low 70s. Wednesday will be warmer with near normal temperatures, highs ranging from the 70s at the beaches to the upper 80s to the lower 90s across the Rio Grande Plains.

LONG TERM
(Wednesday night through Monday)
Issued at 244 AM CDT Tue Apr 23 2024

Dry and tranquil weather conditions are expected to persist through the long-term forecast period with continued influences of a surface high pressure system overhead. With low pressure systems over the mountains of north-central Mexico and a surface high just to our east, a surface pressure gradient is expected to strengthen over the region Thursday into the weekend. With low level jet (LLJ) winds at times increasing between 40-45 kts, there is the potential for wind gusts at times meeting Wind Advisory criteria during this time period. On the western flank of a surface high pressure system and 500 mb ridge axis, a return flow out of the south-southeast keep a moist and warm air advection (WAA) regime in place. Temperatures overall will be near normal to slightly warmer than normal with daytime highs ranging between the upper 80s to mid 90s and overnight lows in the 70s.

AVIATION
(06Z TAFS)
Issued at 1257 AM CDT Tue Apr 23 2024

Satellite imagery and surface observations continue to indicate overcast skies around 5000 ft across the region with VFR ceilings.
Model guidance suggest intermittent periods of MVFR ceilings may return between around 16-17Z and continuing through much of the period at all aerodromes. Otherwise, winds will continue to gradually shift to the east overnight and southeast later today.

MARINE
Issued at 244 AM CDT Tue Apr 23 2024

Now through Wednesday...High pressure across the northern Gulf will slide eastward through midweek. This will maintain light to moderate southeast winds and low to moderate seas through the period.

Wednesday night through Monday....Adverse marine conditions are expected to develop Thursday through the weekend amid a strengthening surface pressure gradient. Small Craft Exercise Caution conditions are expected to develop on Thursday with Small Craft Advisory conditions being possible as early as Thursday night.
Small Craft Advisory conditions are expected to persist through the weekend with Small Craft Exercise Caution conditions developing early next week.

PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 82 72 84 74 / 10 0 10 0 HARLINGEN 82 70 86 71 / 10 0 10 0 MCALLEN 83 72 88 73 / 10 0 10 0 RIO GRANDE CITY 84 71 89 72 / 10 0 0 0 SOUTH PADRE ISLAND 77 73 78 74 / 0 0 10 0 BAYVIEW/PORT ISABEL 81 71 83 73 / 10 0 10 0

BRO WATCHES/WARNINGS/ADVISORIES
TX...None.
GM...None.

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Port Isabel
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Tue -- 05:46 AM CDT     1.38 feet High Tide
Tue -- 06:39 AM CDT     Moonset
Tue -- 06:57 AM CDT     Sunrise
Tue -- 06:51 PM CDT     Full Moon
Tue -- 07:56 PM CDT     Moonrise
Tue -- 07:56 PM CDT     Sunset
Tue -- 09:45 PM CDT     0.05 feet Low Tide
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