Deep Cold Trough Meets Gulf Moisture with Significant Impacts Across the Western and Central U.S.

A deep trough and associated cold front is bringing much below normal temperatures in the west, with low elevation snows. Strong winds and widespread snow, will impact the Great Basin, western mountains, and the Plains. The slowing front, will bring prolonged waves of heavy rain across the Mississippi Valley to the Great Lakes. Significant icing forecast north of the heavy rain. Big warm up east.
Read More...

Last Update: 839 AM PST Mon Feb 19 2018

View Nearby Observations

13NM W San Francisco CA

Marine Zone Forecast

...SMALL CRAFT ADVISORY FOR ROUGH BAR IN EFFECT UNTIL 8 PM PST

Synopsis: PZZ500-192345- 839 AM PST Mon Feb 19 2018 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Strong northwest winds will usher in arctic air today and generate fresh swell and steep wind waves. Showers will continue through the day. Another trough will swiftly move southward over the coastal waters late Wednesday night with a slight chance of showers. $$

Today
NW winds 20 to 30 kt. Wind waves 5 to 7 ft. NW swell 9 to 12 ft at 13 seconds. Slight chance of showers late in the morning.
Tonight
NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 10 to 12 ft at 13 seconds.
Tue
N winds 15 to 25 kt...becoming NW 5 to 15 kt in the afternoon. Wind waves 3 to 5 ft. NW swell 7 to 9 ft at 12 seconds.
Tue Night
NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft at 12 seconds. Slight chance of showers after midnight.
Wed
E winds 10 kt...becoming W. Wind waves 3 to 4 ft. NW swell 3 to 5 ft at 11 seconds. Slight chance of showers in the morning. Slight chance of showers after midnight.
Thu
NW winds 20 to 30 kt. Wind waves 4 to 6 ft. W swell 3 to 5 ft. Slight chance of showers.
Fri
NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 3 to 5 ft. .....san francisco bar/fourfathom bank forecast..... in the deep water channel...combined seas 9 to 11 ft at 14 seconds. across the bar...combined seas 11 to 13 feet at 14 seconds. maximum ebb current of 2.6 knots at 06:43 pm monday and 2.7 knots at 07:01 am tuesday.
  Click Map For Detailed Forecast

ABOUT THIS FORECAST

Last Update: 839 AM PST Mon Feb 19 2018
  Forecast Discussion
   

RADAR & SATELLITE IMAGES

Link to Local Radar Data Link to Satellite Data