Marine Weather Net

Lower Atchafalaya River to Intracoastal City, LA from 20 - 60 NM Marine Forecast


TONIGHT

NW
WINDS
15 - 20
KNOTS

MONDAY

N
WINDS
10 - 15
KNOTS

MONDAY NIGHT

NE
WINDS
5 - 10
KNOTS

TUESDAY

SE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ475 Forecast Issued: 343 PM CST Sun Jan 16 2022

SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM CST THIS EVENING ...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 10 PM CST THIS EVENING...
Tonight...Northwest Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas Up To 7 Feet.
Monday...North Winds 10 To 15 Knots. Seas 1 To 3 Feet.
Monday Night...Northeast Winds 5 To 10 Knots Becoming East After Midnight. Seas 1 To 2 Feet.
Tuesday...Southeast Winds 10 To 15 Knots. Seas 1 To 2 Feet.
Tuesday Night...South Winds 10 To 15 Knots. Seas 3 To 5 Feet.
Wednesday...Southwest Winds 10 To 15 Knots. Seas 3 To 5 Feet.
Wednesday Night...Southwest Winds 10 To 15 Knots Becoming Northwest 15 To 20 Knots After Midnight. Seas 3 To 5 Feet. Chance Of Showers And Thunderstorms.
Thursday...North Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas Up To 7 Feet. Chance Of Thunderstorms In The Morning. Chance Of Rain Showers Through The Day.
Thursday Night...Northeast Winds 20 To 25 Knots. Seas 4 To 7 Feet With Occasional Seas Up To 8 Feet. Slight Chance Of Rain Showers In The Evening, Then Chance Of Rain Showers After Midnight.
Friday...North Winds 20 To 25 Knots. Seas 5 To 8 Feet With Occasional Seas Up To 10 Feet. Chance Of Rain Showers In The Morning, Then Slight Chance Of Rain Showers In The Afternoon.
Friday Night...Northeast Winds 15 To 20 Knots. Seas 4 To 7 Feet With Occasional Seas Up To 8 Feet. Slight Chance Of Rain Showers.
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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
343 PM CST Sun Jan 16 2022

Northwest winds will continue to subside the rest of the afternoon and into this evening, though the persistent offshore flow coupled with low astronomical tide levels will still yield low water conditions on the coastal lakes and bays. Surface high pressure will traverse the region on Monday, with an onshore flow developing in its wake. This southerly flow will continue until another frontal passage Wednesday night.
Area Forecast Discussion
National Weather Service Lake Charles LA
430pm CST Sunday Jan 16 2022

00Z TAFS

/issued 347pm CST Sunday Jan 16 2022/

Short Term - Tonight Through Tuesday
Upper low now over the SE CONUS and continuing to pull away from the region, with wrap around clouds now well east of the area as a deeper plume of MSTR spreads in from the west. NW winds are still a little gusty, but will continue to settle down this evening as the gradient relaxes and weak SFC high pressure to the west slides eastward. Good though not ideal radiational cooling is expected tonight, and lows will once again drop into the lower/mid 30s.

Another SFC high dropping south from the Plains will traverse the area tomorrow with NW flow prevailing aloft. A sunny and seasonably mild afternoon is forecast, with highs reaching the lower to perhaps mid 60s.

As the SFC high shifts east of the area tomorrow night, an initially light return southerly flow will become established, becoming more modest through the day TUE between the departing high and an area of low pressure over the Southern Plains. Amid this warm air/moisture advection regime, lows TUE morning near or just above normal are expected, giving way to high temperatures TUE that will climb well above normal into the upper 60s to lower 70s.

Long Term - Wednesday Through Sunday
The long term period has not changed significantly since yesterday. It will be denoted by a cold front that will be moving through the area Wednesday into Thursday which will bring much cooler air. Wednesday will be warm with onshore flow present prior to the arrival of the cold front. The warm temperatures, moisture with onshore flow, and forced uplift from the front will mean there will be chances for showers and thunderstorms Wednesday into Thursday. Much cooler air will be arriving post frontal. Cooler temperatures will be expected to persist to the end of the period with an area of high pressure in the region which will help keep northerly flow and prevent a significant warm up.

Shortwave energy will be expected to move across the southwestern U.S. and enter our area over the weekend. The significant cloud cover expected along with still mostly northerly winds will mean temperatures will remain below average late in the period. NBM is indicating continued chances for precipitation post frontal Thursday into the weekend. However, ECMWF (European Centre for Medium-Range Weather Forecasts) is not showing precipitation post frontal and GFS is only showing very modest amounts over the weekend. Given that northerly flow will persist and moisture will be expected to be low inland, NBM Probability of Precipitation and WPC Quantitative Precipitation Forecast were reduced post frontal Thursday into the weekend. Although there will be a chance for snow post frontal, areas that are most likely to see any precipitation will be areas that are expected to be above freezing (near the coast and offshore). Chances for precipitation will be low post frontal regardless.

55

Marine
Northwest winds will continue to subside the rest of the afternoon and into this evening, though the persistent offshore flow coupled with low astronomical tide levels will still yield low water conditions on the coastal lakes and bays. Surface high pressure will traverse the region on Monday, with an onshore flow developing in its wake. This southerly flow will continue until another frontal passage Wednesday night.

13

NOAA Lake Charles LA Office: Watches - Warnings - Advisories
LA...None. TX...None. GM...Small Craft Advisory until 6pm CST this evening for GMZ472-475.

Small Craft Exercise Caution until 10pm CST this evening for GMZ472-475.

Small Craft Exercise Caution until 6pm CST this evening for GMZ435-452-455-470.

Low Water Advisory until noon CST Monday for GMZ430-432-435.