013
WHUS74 KHGX 180940
MWWHGX
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
340 AM CST THU DEC 18 2025
GMZ350-355-181745-
/O.CON.KHGX.MF.Y.0039.000000T0000Z-251218T1600Z/
/O.NEW.KHGX.SC.Y.0070.251219T0300Z-251219T1400Z/
COASTAL WATERS FROM FREEPORT TO MATAGORDA SHIP CHANNEL TX OUT
20 NM-COASTAL WATERS FROM HIGH ISLAND TO FREEPORT TX OUT 20 NM-
340 AM CST THU DEC 18 2025
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 8 AM
CST FRIDAY...
* WHAT...FOR THE DENSE FOG ADVISORY, DENSE FOG WILL REDUCE
VISIBILITY TO 2 TO 3 NM. FOR THE SMALL CRAFT ADVISORY, NORTHEAST
WINDS 20 TO 25 KT WITH GUSTS OF 25 TO 30 KT EXPECTED.
* WHERE...COASTAL WATERS FROM FREEPORT TO MATAGORDA SHIP CHANNEL
TX OUT 20 NM AND COASTAL WATERS FROM HIGH ISLAND TO FREEPORT
TX OUT 20 NM.
* WHEN...FOR THE DENSE FOG ADVISORY, UNTIL 10 AM CST THIS
MORNING. FOR THE SMALL CRAFT ADVISORY, FROM 9 PM THIS EVENING
TO 8 AM CST FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT. LOW
VISIBILITY WILL MAKE NAVIGATION DIFFICULT.
* ADDITIONAL DETAILS...THE BEST POTENTIAL FOR DENSE FOG WILL BE
OVER THE BAYS, PARTICULARLY GALVESTON BAY, AS WELL AS VERY NEAR
SHORE ON THE GULF. POTENTIAL FOR DENSE FOG WILL DECREASE FARTHER
FROM SHORE, THOUGH PATCHY FOG MAY STILL BE EXPERIENCED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
IF YOU MUST NAVIGATE, PROCEED WITH CAUTION. USE PROPER FOG
SIGNALS. MAKE SURE ALL RUNNING LIGHTS ARE ON. REMEMBER TO USE
YOUR RADAR AND COMPASS.
GMZ370-375-181745-
/O.NEW.KHGX.SC.Y.0070.251219T0300Z-251219T1400Z/
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-
340 AM CST THU DEC 18 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 8 AM
CST FRIDAY...
* WHAT...NORTHEAST WINDS 20 TO 25 KT WITH GUSTS UP TO 30 KT AND
SEAS 4 TO 7 FT EXPECTED.
* WHERE...WATERS FROM FREEPORT TO MATAGORDA SHIP CHANNEL TX FROM
20 TO 60 NM AND WATERS FROM HIGH ISLAND TO FREEPORT TX FROM 20
TO 60 NM.
* WHEN...FROM 9 PM THIS EVENING TO 8 AM CST FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
GMZ330-335-181600-
/O.CON.KHGX.MF.Y.0039.000000T0000Z-251218T1600Z/
MATAGORDA BAY-GALVESTON BAY-
340 AM CST THU DEC 18 2025
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS
MORNING...
* WHAT...DENSE FOG WILL REDUCE VISIBILITY TO 1 NM OR LESS.
* WHERE...PORTIONS OF GULF OF AMERICA.
* WHEN...UNTIL 10 AM CST THURSDAY.
* IMPACTS...LOW VISIBILITY WILL MAKE NAVIGATION DIFFICULT.
* ADDITIONAL DETAILS...THE BEST POTENTIAL FOR DENSE FOG WILL BE
OVER THE BAYS, PARTICULARLY GALVESTON BAY, AS WELL AS VERY NEAR
SHORE ON THE GULF. POTENTIAL FOR DENSE FOG WILL DECREASE FARTHER
FROM SHORE, THOUGH PATCHY FOG MAY STILL BE EXPERIENCED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST NAVIGATE, PROCEED WITH CAUTION. USE PROPER FOG
SIGNALS. MAKE SURE ALL RUNNING LIGHTS ARE ON. REMEMBER TO USE
YOUR RADAR AND COMPASS.
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