Breton Sound Marine Forecast
| Rest Of Tonight...Northwest Winds Around 10 Knots. Waves Around 2 Feet. |
| Monday...North Winds 5 To 10 Knots. Waves Around 2 Feet In The Morning, Then 1 Foot Or Less. |
| Monday Night...Northeast Winds 5 To 10 Knots. Waves 1 Foot Or Less, Then Around 2 Feet After Midnight. |
| Tuesday...Northeast Winds 10 To 15 Knots With Gusts Up To 20 Knots. Waves 2 To 3 Feet. |
| Tuesday Night...East Winds Around 10 Knots. Waves Around 2 Feet. |
| Wednesday...East Winds Around 10 Knots. Waves Around 2 Feet. |
| Wednesday Night...East Winds Around 10 Knots. Waves Around 2 Feet. A Chance Of Showers. |
| Thursday...Northeast Winds Around 10 Knots. Waves Around 2 Feet. A Chance Of Showers, Mainly In The Morning. |
| Thursday Night...East Winds Around 10 Knots. Waves 2 To 3 Feet. A Slight Chance Of Showers. |
| Friday...East Winds Around 10 Knots. Waves Around 2 Feet. A Slight Chance Of Showers In The Morning, Then A Chance Of Showers In The Afternoon. |
| Friday Night...East Winds 10 To 15 Knots. Waves 2 To 3 Feet. A Chance Of Showers. |
| Area Forecast Discussion National Weather Service New Orleans LA 1142pm CST Sunday Jan 18 2026 .SHORT TERM... (Tonight through Tuesday night) Issued at 1124pm CST Sunday Jan 18 2026 Upper trough axis was well to the east of the local area this evening, extending from eastern Canada to the Carolinas, with the next shortwave over Minnesota. At the surface, the axis of high pressure extended from the western Gulf into west Tennessee. Low pressure over Wisconsin had a cold front into southern Kansas. Arctic high pressure was north of that front over the Canadian Rockies. Locally, clear skies across the area with temperatures mainly in the 30s away from marine influences, although a few locations have dropped below 30. The upper trough won't be making much more eastward progress, but will have multiple shortwaves dropping into the base of the trough over the next 48 hours. One such shortwave will reinforce the cold air late Monday afternoon. The airmass will remain very dry, with precipitable water values near or below 0.40 inches through Tuesday afternoon. Could start to see some high clouds by Tuesday night, but no precipitation is expected over the next 48 hours. High temperatures the next couple days should be warmer than what was seen Sunday afternoon, and should primarily be in the 55 to 60 degree range. Monday night lows won't be quite as chilly as the current overnight period, but northern portions of the area are likely to still fall below freezing. Southeast winds and some clouds should bring milder overnight lows Tuesday night, ranging from mid 30s across northeast portions of the area to the mid 40s south of Lake Pontchartrain. Long Term (Wednesday through Sunday night) Issued at 1124pm CST Sunday Jan 18 2026 Upper flow is expected to remain zonal for Wednesday through Friday. The best chance for rain during this workweek will be late Wednesday into Thursday as a southern stream shortwave moves along the northern Gulf Coast. Both the ECMWF (European Centre for Medium-Range Weather Forecasts) and GFS (Global Forecast System) have become somewhat less focused with this system, with light rain the most likely result. Temperatures will move above normal on Wednesday, and moreso Wednesday night through Friday, with highs Thursday and Friday potentially around 70. Beyond Friday, forecast confidence drops considerably, as the medium range modeling is struggling to handle the potential development of an upper low in the vicinity of Arizona, and the resultant split flow. Noted very significant temperature spreads (30+ degrees F) between the NBM 10th-90th percentiles for both high and low temperatures across portions of the area both Saturday and Sunday from the daytime guidance, as well as within the ECMWF ensemble. The standard deviation in the ECMWF ensemble temperatures is about 10 degrees for most of our sites next weekend. The GFS 10th to 90th spread was about 25F. While the means and 50th percentiles might not pose significant issues next weekend, the colder end of guidance envelopes would bring wintry precipitation types into play. Will not adjust temperature guidance away from deterministic at this time due to high uncertainty. One safe assumption to make is that the forecast for Saturday and Sunday is likely to change significantly between now and then, as confidence in the eventual solution improves. Just a question of which direction. Marine Issued at 1124pm CST Sunday Jan 18 2026 A reinforcing cold front moves into the Gulf by Monday night. Winds may bump back up to exercise caution category but not looking like Small Craft Advisory conditions at the moment. A short-term period of return flow does develop mid week as post frontal ridging situated north of the region slides east before the next cold front comes through late in the week. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...Freeze Warning until 9am CST Monday for LAZ056>060-065>067- 087>090. GM...None. MS...None. GM...None. |
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