Unseasonably cold temperatures spreading into central U.S.
A strong cold front will usher a much colder air mass into the central and eastern U.S. for the end of the work week. Temperatures will be 10 to 20 degrees below average in some areas. Rain and snow will be possible across the Great Lakes on Friday as the system crosses the area. Heavy snow is possible in the central Appalachians Friday night.
Hazardous Weather Conditions
38NM WNW San Francisco CA
Marine Point Forecast [NOTICE]
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM PDT FRIDAY THROUGH
- SynopsisLIGHT WIND AND SEAS ARE EXPECTED THROUGH LATE TONIGHT. WINDS WILL
GRADUALLY INCREASE EARLY FRIDAY MORNING AS A STRONG COLD FRONT
APPROACHES THE NORTHERN WATERS. WINDS WILL BRIEFLY INCREASE AHEAD
AND JUST BEHIND THE FRONTAL PASSAGE AS RAIN MOVES FROM NORTH TO
SOUTH THROUGH THE WATERS ON FRIDAY ALONG WITH A SLIGHT CHANCE OF
THUNDERSTORMS. BEHIND THE FRONT LIGHTER NW WINDS ARE FORECAST
FRIDAY EVENING. ON SATURDAY STRONGER NW WINDS AND BUILDING SEAS TO
AROUND 10 FEET WILL DEVELOP CREATING SOME HAZARDOUS SEAS FOR THE
START OF CRAB SEASON.
- Overnight SW wind around 7 kt becoming SSE after midnight. A chance of rain. Mixed swell...WNW 3 ft at 9 seconds and S 1 ft at 12 seconds. Wind waves 1 to 2 ft.
- Friday Variable winds less than 5 kt becoming NNW 9 to 14 kt in the morning. Showers likely, then showers and possibly a thunderstorm after 11am. Mixed swell...WNW 4 ft at 15 seconds and SW 1 ft at 11 seconds. Wind waves 2 to 4 ft.
- Friday Night NW wind 10 to 13 kt. Showers likely and possibly a thunderstorm. Some of the storms could produce small hail. Mixed swell...WNW 7 ft at 14 seconds and SW 1 ft at 11 seconds building to at 14 seconds . Wind waves 1 to 2 ft.
- Saturday NW wind 17 to 21 kt. A chance of showers, mainly before 11am. Mixed swell...WNW 8 ft and SSW 1 to 2 ft. Wind waves 2 to 3 ft.
- Saturday Night NNW wind 13 to 18 kt. Mostly clear. Mixed swell...WNW 7 ft and SW 1 ft. Wind waves around 2 ft.
- Sunday NW wind around 8 kt. Sunny. Mixed swell...WNW 5 ft and SW 1 ft. Wind waves around 1 ft.
- Sunday Night NNW wind around 13 kt. Mostly clear. Mixed swell...WNW 4 ft and SW 1 ft. Wind waves 1 to 2 ft.
- Monday NNW wind around 6 kt becoming variable and less than 5 kt in the morning. Mostly sunny. Mixed swell...WNW 5 ft and SW 1 ft. Wind waves around 1 ft.
- Monday Night NW wind around 10 kt. Partly cloudy. Mixed swell...WNW 5 ft and SSW 1 ft. Wind waves around 1 ft.
This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area.
Forecast information for a larger area can be found within the zone
forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc.
These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
HOURLY WEATHER GRAPH
NATIONAL DIGITAL FORECAST DATABASE