Marine Weather Net

Cameron, LA to High Island, TX Marine Forecast


TODAY

E
WINDS
15 - 20
KNOTS

TONIGHT

SE
WINDS
20 - 25
KNOTS

THURSDAY

W
WINDS
15 - 20
KNOTS

THURSDAY NIGHT

N
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ450 Forecast Issued: 924 AM CST Wed Jan 22 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
Today...East Winds 15 To 20 Knots. Seas 3 To 5 Feet. Chance Of Rain Showers In The Morning, Then Rain Showers In The Afternoon.
Tonight...Southeast Winds 20 To 25 Knots. Seas 3 To 6 Feet With Occasional Seas Up To 7 Feet. Slight Chance Of Thunderstorms In The Evening. Rain Showers Through The Night. Chance Of Thunderstorms After Midnight.
Thursday...West Winds 15 To 20 Knots. Seas 3 To 5 Feet. Rain Showers Likely In The Morning. Slight Chance Of Thunderstorms Through The Day. Chance Of Rain Showers In The Afternoon.
Thursday Night...North Winds 10 To 15 Knots. Seas 1 To 3 Feet.
Friday...Northwest Winds 10 To 15 Knots. Seas 1 To 3 Feet.
Friday Night...North Winds 5 To 10 Knots. Seas 1 To 2 Feet.
Saturday...East Winds 10 To 15 Knots. Seas 1 To 2 Feet.
Saturday Night...Southeast Winds 10 To 15 Knots. Seas 1 To 3 Feet. Chance Of Rain Showers In The Evening, Then Rain Showers Likely After Midnight.
Sunday...East Winds 10 To 15 Knots Becoming Northeast 5 To 10 Knots In The Afternoon. Seas 1 To 3 Feet. Chance Of Rain Showers.
Sunday Night...Northeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Slight Chance Of Rain Showers In The Evening.
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Synopsis for Lower Atchafalaya River LA to High Island TX out 60 NM including Sabine and Calcasieu Lakes and Vermilion Bay: GMZ400
924 AM CST Wed Jan 22 2020

Surface high pressure continues to move off to the east through the day while a surface low begins to develop in the Texas Panhandle. The result is winds turning out of the east-southeast, and with a tighter pressure gradient, an increase in wind speed. The combination of an upper level disturbance and the aforementioned surface low moving through the region will lead to increased shower and thundershower chances through late Thursday. Precipitation will taper off after a cold front moves through late Thursday, with a moderate offshore flow developing. Lighter and more variable winds are expected by late Friday and into Saturday as high pressure builds in. Another upper level system moves through on Sunday, bringing increased winds and rain chances yet again.
Area Forecast Discussion
National Weather Service Lake Charles LA
1039am CST Wednesday Jan 22 2020

Just a minor update to include all of Acadiana in a low end rain chance this afternoon. Rather dismal day to continue with thickening clouds and light rains overspreading the area. Temperatures will struggle to warm from early morning lows with the clouds and rain in place.

AVIATION... High pressure centered across Appalachia this morning is resulting in moderate easterly winds. A developing surface low over the great plains will tighten the pressure gradient across the region through the day resulting in moderate to strong east southeasterly flow by this afternoon.

A widespread precipitation shield associated with this low will spread across the area from west to east through the day with CIGs falling to MVFR (Marginal Visual Flight Rules) late this morning into early this afternoon then to IFR overnight. Isolated thunderstorms cannot be completely ruled out at the coastal terminals overnight, but probability is low.

Fairly quiet and chilly night thus far across the region as surface high pressure begins to slide eastward. Current surface map showing temperatures spanning from the low 30s inland to mid 40s closer to the coast. Radars showing the first indication of some precipitation associated with an approaching system in the piney woods of SE TX.

Moisture continues to stream over the region in association with the southern jet, as an upper level shortwave pushes into the southern Plains. An area of surface low pressure develops in the Texas Panhandle region in response to the shortwave, which will in turn advance southeast. Rain chances increase through the morning, with widespread showers expected to develop by the latter half of the day. Some periods of moderate rain will be possible, though the lack of instability should preclude any strong convection. A little instability does look to build in overnight Wednesday into Thursday with a few embedded thunderstorms possible in what should remain mostly widespread shower activity. Precipitation tapers off late Thursday as the surface low pushes east of the region and drier air begins to move in. Still expecting generally around 1 to 2 inches of rainfall with some locally higher amounts possible in areas that may see a few of the aforementioned embedded thunderstorms.

Surface high pressure takes hold for Friday and Saturday with only minimal ridging noted in the upper level pattern. Upper pattern quickly buckles to shortwave energy traversing the Plains while southern stream energy aids in the development of a surface low in the NW Gulf. Features quickly slide eastward, but result in an uptick in rain chances for Sunday. Instability forecast to remain offshore, so not expecting much in the way of thunder. Upper level ridging looks to develop for at least the start of the work week, but an overall progressive pattern appears likely to continue with a deeper trough digging into the southern Plains by mid-week.

Marine Discussion
Surface high pressure continues to move off to the east through the day while a surface low begins to develop in the Texas Panhandle. The result is winds turning out of the east-southeast, and with a tighter pressure gradient, an increase in wind speed. The combination of an upper level disturbance and the aforementioned surface low moving through the region will lead to increased shower and thundershower chances through late Thursday. Precipitation will taper off after a cold front moves through late Thursday, with a moderate offshore flow developing. Lighter and more variable winds are expected by late Friday and into Saturday as high pressure builds in. Another system moves through on Sunday, bringing increased winds and rain chances yet again.



NOAA Lake Charles LA Office: Watches - Warnings - Advisories
LA...None. TX...None. GM...Small Craft Advisory from 3pm this afternoon to noon CST Thursday for GMZ455-475.

Small Craft Advisory until 6am CST Thursday for GMZ450-470.

Small Craft Advisory until 9am CST Thursday for GMZ452-472.

Small Craft Advisory from 9pm this evening to 6am CST Thursday for GMZ435.