Marine Weather and Tide Forecast for Port Arthur, TX

SHORT TERM
(Tonight through Sunday night)
Issued at 1233 PM CST Fri Dec 12 2025

A warm front has lifted inland this morning allowing humid marine air to infiltrate through forecast area. Additionally isolated showers will wain through the early evening. With the addition of warmer dewpoints across the region another round of patchy dense fog is expected to occur overnight. Areas of fog and low clouds may stick around through the mid morning. The stalled warm front will remain to our north through Saturday evening keeping temperatures well above normal. A weak upper level disturbance will migrate across the northern Gulf and begin to phase with the massive shortwave pattern deepening across the Eastern U.S. Both features will help to create a sharp drop temperatures going into Sunday.

Scattered showers will increase into the early morning hours Sunday with the advancing Canadian cold front toward the coast. A few pockets of efficient rainfalls are likely during the overnight hours, however, widespread substantial over 0.25" rainfall amounts are less likely. High temperatures Sunday will be occurring around midnight(12:00AM) Sunday with temperatures steadily falling through the afternoon. Skies are projected to clear by the afternoon; temperatures will be falling below 40°F shortly after sunset. Big focus on the short range will be the precariously cold lows and windchills overnight into Monday morning. As it stands now in the forecast conditions will likely meet/exceed cold weather advisory criteria during this period where lows in the 20's and windchills in the teens are forecast.

Kowalski / 30



LONG TERM
(Monday through next Thursday)
Issued at 1233 PM CST Fri Dec 12 2025

Cool highs in the 40's will trend across the forecast area Monday with the northerly advection. The robust high pressure will quickly broaden eastward over the Carolinas by Tuesday. Winds will veer onshore overnight into Wednesday allowing temperatures to begin a warming trend through the later half of the week. A few convective showers may develop pending the depth of any low/mid level inversions during the mid week. However, much of the long range will trend dry through the end of next week. This onshore regime will persist until the following weekend offering above normal highs in the 60's and 70's.

Kowalski / 30



AVIATION
(18Z TAFS)
Issued at 1233 PM CST Fri Dec 12 2025

Vicinity showers will continue through the evening hours offering brief reductions in ceilings and VIS. Onshore flux of warmer dewpoints over cooler surface will likely result in marine fog spreading inland. Periods of dense fog will be possible after midnight with winds calming. LIFR ceilings will also result for most TAF sites toward the morning twilight hours. Low ceilings expected to trend through mid morning of the 13th.

MARINE
Issued at 1233 PM CST Fri Dec 12 2025

Guidance has trended toward areas of fog developing with warm dewpoints moving over cooler shelf and lake waters tonight. A marine dense fog advisory is possible tonight. Winds offshore will remain out of the south with varying SE components through early Saturday afternoon. Occasional showers are possible this evening and Saturday, but coverage appears limited. Overnight Saturday into Sunday a very robust cold front will push offshore.
Gale Watch may necessary for this period, but at the very least Small Craft Advisory criteria will be well exceeded including lakes and bays. Winds will slowly ease into Monday before veering east.



FIRE WEATHER
Issued at 1233 PM CST Fri Dec 12 2025

Winds will be onshore through early Saturday morning before gaining E-SE components on Saturday afternoon. Increasing RH will likely lead to areas of patchy dense fog tomorrow morning.
Minimum RH values around 40-50% this afternoon will be increasing to 60% - 70% for Friday afternoon. With winds becoming variable and calming to under 3kts following humid onshore / ESE flow, chance of fog is at least 30% for Visibility dropping under 1 mi early Saturday AM. High pressure will build to our east and will pull more moist air north from the Gulf increasing rain chances this weekend. North Winds Sunday are forecast to increase behind the cold front with cold temperatures to follow.



PRELIMINARY POINT TEMPS/POPS
AEX 53 71 41 52 / 10 20 80 10 LCH 59 76 51 62 / 20 20 70 30 LFT 58 75 50 58 / 10 20 60 30 BPT 59 76 53 62 / 10 20 60 20

LCH WATCHES/WARNINGS/ADVISORIES
LA...None.
TX...None.
GM...None.