Marine Weather Net

Port Mansfield, TX to the Rio Grande River 20 - 60 NM Marine Forecast


REST OF TODAY

SE
WINDS
15 - 20
KNOTS

TONIGHT

SE
WINDS
10 - 15
KNOTS

WEDNESDAY

SE
WINDS
10 - 15
KNOTS

WEDNESDAY NIGHT

SE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ170 Forecast Issued: 905 AM CDT Tue Apr 16 2024

SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON CDT TODAY ...SMALL CRAFT SHOULD EXERCISE CAUTION AFTER NOON PM CDT TODAY...
Rest Of Today...Southeast Winds 15 To 20 Knots Decreasing To 10 To 15 Knots This Afternoon. Seas 5 To 7 Feet, With Occasional Seas Up To 8 Feet.
Tonight...Southeast Winds 10 To 15 Knots Increasing To 15 To 20 Knots After Midnight. Seas 5 To 7 Feet, With Occasional Seas Up To 8 Feet.
Wednesday...Southeast Winds 10 To 15 Knots. Seas 5 To 7 Feet, With Occasional Seas Up To 8 Feet.
Wednesday Night...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet.
Thursday...Southeast Winds 10 To 15 Knots Decreasing To 5 To 10 Knots In The Afternoon. Seas 4 To 5 Feet.
Thursday Night...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet.
Friday...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet.
Friday Night...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet.
Saturday...Southeast Winds 10 To 15 Knots. Seas 3 To 5 Feet.
Saturday Night...East Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Slight Chance Of Showers In The Evening, Then A Chance Of Showers With A Slight Chance Of Thunderstorms After Midnight. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service Brownsville TX
1251pm CDT Tuesday April 16 2024

Long Term
(Wednesday night through Monday) Issued at 227am CDT Tuesday April 16 2024

Storm Prediction Center places the upper RGV/Rio Grande Valley Plains in a general thunderstorm outlook Wednesday night. The NBM has brought in low end convective chances, just enough to show up in the forecast. Unstable southwest mid-level flow ahead of NW Mexico short wave trough will trigger overnight Sierra Madre Oriental convection, some of which could drift into the upper RGV. Otherwise, a bit of coastal and inland fog will be possible Wednesday night. The upper Rio Grande Valley is again in the Storm Prediction Center general thunderstorm outlook for Thursday afternoon/evening. The cause looks similar to that of Wednesday night. A weak signal is back again Friday evening. The upstream trough will lose definition, becoming simple perturbations moving through the flow, but the time of year is right for the Sierra Madre based convection.

Aside from the low end thunderstorm threat to the west this week, not much else will be going on until the weekend. Until then see a mix of clouds and sun along with moderate winds and warmer than average temperatures.

The next good opportunity for convection will be on Saturday and Sunday. Unleashed by a Plains high pressure outbreak, a cold front will push south into the CWA (County Warning Area) on Saturday. The mid level flow will again advertise ripples of energy from the southwest at the base of a tough over the southern Plains. The result will be a chance of showers and thunderstorms along the front, increasing in coverage Saturday night through Sunday, with chances lingering into Monday. Winds will shift to northeast Sunday morning, becoming moderate. Some clearing should occur Monday afternoon. The cooler air behind the front should drop temps down from above normal to near normal Sunday and Monday, but expect a mild rebound on Tuesday as high pressure shifts east. Rain amounts overall will probably not be impressive, measuring in tenths of inches, which could be generous.

Marine
Issued at 227am CDT Tuesday April 16 2024

Today through Wednesday...A Small Craft Advisory will remain in effect for the Gulf of Mexico waters from 0 to 60 nautical miles offshore until noon today. Meanwhile, Small Craft Should Exercise Caution is likely on the Laguna Madre. Afterwards, Small Craft Should Exercise Caution will likely be needed for the remainder of the forecast period for the Gulf of Mexico waters, with more moderate winds for the Laguna Madre.

Wednesday night through Saturday night...High pressure across the Gulf of Mexico will support moderate southeast winds and moderate seas through Saturday. A weak cold front is forecast to move offshore the lower Texas coast Saturday night to Sunday morning, bringing moderate to fresh northeast winds and a slight chance to chance of shower with a few included thunderstorms.

NOAA Brownsville TX Office: Watches - Warnings - Advisories
TX...High Rip Current Risk through Wednesday morning for TXZ451-454- 455.

GM...None.