Marine Weather Net

Galveston Bay Marine Forecast


REST OF TODAY

SE
WINDS
20 - 25
KNOTS

TONIGHT

NW
WINDS
15 - 20
KNOTS

THURSDAY

NW
WINDS
15 - 20
KNOTS

THURSDAY NIGHT

N
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ335 Forecast Issued: 1006 AM CST Wed Dec 02 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING
Rest Of Today...Southeast Winds 20 To 25 Knots And Gusty Becoming 15 To 20 Knots In The Afternoon. Bay Waters Choppy. Thunderstorms And Showers In The Late Morning And Early Afternoon, Then A Chance Of Thunderstorms And Showers Late In The Afternoon. Some Thunderstorms May Be Severe In The Late Morning And Early Afternoon.
Tonight...Northwest Winds 15 To 20 Knots Increasing To 20 To 25 Knots After Midnight. Bay Waters Choppy Becoming Rough After Midnight. Thunderstorms And Showers Likely Early In The Evening, Then A Chance Of Showers Late In The Evening.
Thursday...Northwest Winds 15 To 20 Knots. Bay Waters Choppy.
Thursday Night...North Winds 10 To 15 Knots. Bay Waters Slightly Choppy.
Friday...Northwest Winds 10 To 15 Knots Decreasing To 5 To 10 Knots In The Afternoon. Bay Waters Slightly Choppy Becoming Smooth In The Afternoon.
Friday Night...Northwest Winds 5 To 10 Knots. Bay Waters Smooth.
Saturday...West Winds 5 To 10 Knots. Bay Waters Smooth.
Saturday Night...Northwest Winds 5 To 10 Knots. Bay Waters Smooth.
Sunday...Northwest Winds 5 To 10 Knots. Bay Waters Smooth.
Sunday Night...North Winds 5 To 10 Knots. Bay Waters Smooth.
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Synopsis for High Island to the Matagorda Ship Channel out 60 nautical miles including Galveston and Matagorda Bays - GMZ300
1006 AM CST Wed Dec 2 2020

Strong onshore winds and elevated seas will persist for most of the day in advance of the next cold front expected to move into the waters late this afternoon and evening. Showers and embedded thunderstorms are expected to increase in coverage during the day and some isolated strong to severe cells are likely. Precipitation will come to an end and northerly winds will strengthen after the front passes. Moderate to occasionally strong offshore flow and elevated seas should then continue for into Friday before gradually subsiding this weekend.
Area Forecast Discussion
National Weather Service Houston/Galveston TX
1202pm CST Wednesday Dec 2 2020

Short Term - Today through Tonight
Quick update with instability lacking across the northern counties expecting only isolated thunderstorms there this afternoon. The main threat will be for the areas southeast of a Liberty to East Houston to Freeport where the heavy rain threat will be the greatest with 1-2.5"/hour rates being common as the showers and thunderstorms move through these areas. Still a small chance for severe - mainly wind and brief weak tornadoes in these coastal counties. As the LLJ shifts eastward this afternoon the threat should shift east as well and become more focused over the coastal waters. Will be keeping a close eye out for waterspouts/hail/strong winds in the coastal waters this afternoon. Temperatures will warm into the lower 70s across the south and stall in the 50s and 60s elsewhere hampering the instability. Will also be expecting another band of storms to develop mid to late afternoon probably in the vicinity of Columbus to Madisonville and march eastward out ahead of or near the incoming cold front. Some small hail threat with these storms.

45

.LONG TERM [Thursday Night Through Wednesday]... High temperatures will be relatively mild from Friday onwards as they slowly creep back into the mid 60s by the middle of next week. An upper-level low situated over the Southern Plains on Thursday will begin to push towards the east and leave in its wake clearing skies over our area beginning late Friday. Models are hinting at another upper low moving through SE Texas, however the timing remains uncertain with it pushing through sometime from Saturday afternoon to Sunday morning. Despite this, the southern jet stream will be oriented just SE of our CWA so dry air will continue to filter in and POPs will remain low through the rest of the forecast period.

KBL

Marine
Strong onshore winds of 15 to 30 knots will continue with gusty conditions and strong to severe thunderstorms through the afternoon hours. Then expect winds to briefly relax before the cold front arrives and winds increase again though out of the north/northwest tonight. 45

NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories
TX...None. GM...Small Craft Advisory from 6pm this evening to 9am CST Thursday for the following zones: Matagorda Bay.

SMALL CRAFT SHOULD EXERCISE CAUTION until 6pm CST this evening for the following zones: Matagorda Bay.

Small Craft Advisory until 9am CST Thursday for the following zones: Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM...Coastal waters from High Island to Freeport TX out 20 NM...Galveston Bay...Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM...Waters from High Island to Freeport TX from 20 to 60 NM.