Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Last Update: 242 AM PST Tue Jan 20 2026

View Nearby Observations

12NM SW San Francisco CA

Marine Zone Forecast


Today
N wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: W 4 ft at 14 seconds.
Tonight
N wind 5 to 10 kt, easing to around 5 kt after midnight. Seas 4 to 5 ft. Wave detail: W 5 ft at 15 seconds.
Wed
N wind around 5 kt. Seas 3 to 5 ft. Wave detail: W 5 ft at 14 seconds.
Wed Night
NW wind around 5 kt. Seas 3 to 5 ft. Wave detail: W 4 ft at 13 seconds.
Thu
NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: W 4 ft at 12 seconds.
Thu Night
NW wind 5 to 10 kt, easing to around 5 kt after midnight. Seas 3 to 5 ft. Wave detail: W 4 ft at 8 seconds.
Fri
N wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: W 5 ft at 9 seconds.
Fri Night
NW wind 5 to 10 kt, veering to N after midnight. Seas 3 to 5 ft. Wave detail: W 5 ft at 10 seconds.
Sat
NE wind around 5 kt. Seas 3 to 5 ft. Wave detail: W 5 ft at 9 seconds.
Sat Night
N wind around 5 kt, veering to NE around 5 kt after midnight. Seas 3 to 4 ft. Wave detail: W 4 ft at 13 seconds.

.....san francisco bar/fourfathom bank forecast.....

in the deep water channel...mixed seas of 2 to 3 feet at 14 seconds.

across the bar...mixed seas of 3 to 4 feet at 14 seconds. Maximum ebb current of 1.5 kt at 05:31 am tuesday and 3.2 kt at 05:14 pm tuesday.




.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 2 to 3 feet at 14 seconds. ACROSS THE BAR...Mixed seas of 3 to 4 feet at 14 seconds. Maximum ebb current of 1.5 kt at 05:31 AM Tuesday and 3.2 kt at 05:14 PM Tuesday.
Basemap Options
Click map to change the forecast location
Loading map...
242 AM PST Tue Jan 20 2026
 
 

RADAR & SATELLITE IMAGES

Link to Local Radar Data Link to Satellite Data