WEATHER »
  • Special Weather Statement for San Fransisco Peninsula Coast County, California
  • Special Weather Statement issued September 11 at 9:25PM PDT by NWS
  • Effective: Monday, September 11, 2017 at 9:25 p.m.
  • Expires: Monday, September 11, 2017 at 10:30 p.m.
  • ...SPECIAL WEATHER STATEMENT...
    At 923 PM PDT, Doppler radar was tracking a cluster of thunderstorms
    over San Mateo and San Francisco counties, moving northwest at 50
    mph.
    Pea sized hail and winds in excess of 30 mph will be possible with
    this storm.
    Locations impacted include...
    San Francisco, Oakland, Hayward, Berkeley, Richmond, Daly City, San
    Mateo, San Leandro, Redwood City, Alameda, South San Francisco, San
    Bruno, Pacifica, Menlo Park, Foster City, Burlingame, San Carlos,
    Belmont, Millbrae and San Lorenzo.

  • Special Weather Statement for San Fransisco Peninsula Coast County, California
  • Special Weather Statement issued January 20 at 12:25PM PST until January 22 at 9:00PM PST by NWS
  • Effective: Wednesday, January 20, 2016 at 12:25 p.m.
  • Expires: Friday, January 22, 2016 at 9 p.m.
  • ...MORE RAIN ON THE WAY BEGINNING LATE THURSDAY...
    ...HEAVIEST RAIN FORECAST FRIDAY EVENING INTO SATURDAY MORNING...
    A SYSTEM WILL APPROACH THE SAN FRANCISCO AND MONTEREY BAY REGION
    LATER THIS WEEK WITH RAIN FORECAST TO RETURN TO THE NORTH BAY
    LATE THURSDAY EVENING AND THEN DOWN TO THE REST OF OUR REGION
    THURSDAY NIGHT INTO FRIDAY MORNING. RAIN WILL SWITCH OVER TO
    SHOWERS BY LATE IN THE MORNING OR EARLY IN THE AFTERNOON ON
    FRIDAY.
    A SECOND PIECE OF ENERGY WILL QUICKLY MOVE TO OUR REGION WITH
    ANOTHER ROUND OF RAIN FORECAST FOR FRIDAY EVENING INTO SATURDAY.
    THIS SECOND FEATURE WILL BE MORE UNSTABLE AND HAVE A GREATER
    POTENTIAL FOR PRODUCING MODERATE TO HEAVY RAIN AT TIMES. OF
    BIGGEST CONCERN IS FOR LATE FRIDAY INTO SATURDAY MORNING WHEN A FRONT
    IS EXPECTED TO MOVE THROUGH WHICH WILL LIKELY LEAD TO THE HIGHEST
    RAINFALL RATES. RAIN WILL SWITCH OVER TO SHOWERS LATER ON SATURDAY
    WITH A FEW THUNDERSTORMS POSSIBLE. IN ADDITION TO THE
    PRECIPITATION, SOUTH TO SOUTWEST WINDS WILL BE ON THE INCREASE.
    MANY LOCATIONS WILL SEE WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH
    FOR FRIDAY INTO SATURDAY.
    RAINFALL AMOUNTS BY SATURDAY AFTERNOON ARE FORECAST TO BE GREATEST
    OVER COASTAL RANGES WHERE 2 TO 4 INCHES WILL BE COMMON. A FEW
    LOCAL SPOTS WILL LIKELY SEE UPWARD OF 6". FOR URBAN LOCATIONS,
    AMOUNTS WILL VARY FROM 1.5" TO 2.5" FOR THE NORTH BAY, TO .75" TO
    1.25" FOR THE REST OF THE AREA.
    AT THE PRESENT TIME, THE BEST POTENTIAL FOR HYDROLOGICAL ISSUES
    WILL BE WITH THE SECOND PIECE OF ENERGY ESPECIALLY LATE FRIDAY
    INTO EARLY SATURDAY. AREAS OF PARTICULAR CONCERN INCLUDE SPOTS
    THAT EXPERIENCED MINOR FLOODING IN THE PAST SYSTEM INCLUDING
    HIGHWAY 1 ALONG THE BIG SUR COAST, PLUS PORTIONS OF SANTA CRUZ AND
    SONOMA COUNTIES.
    CALIFORNIA KING TIDE WILL ALSO OCCUR FRIDAY MORNING AT 6.6 FEET
    WITH A NEARLY IDENTICAL TIDAL HEIGHT SATURDAY MORNING AT 1030 AM
    OF 6.5 FEET. THE OTHER HIGH TIDE WILL BE 5.2 FEET AT 1139 PM
    FRIDAY NIGHT. THE HIGH TIDES FRIDAY AND SATURDAY MORNING WILL LEAD
    TO SOME FLOODING. THE COMBINATION OF RAIN AND HIGH TIDE WILL LEAD
    TO A HEIGHTENED RISK FOR FLOODING.
    A LONG PERIOD WESTERLY SWELL WILL ALSO BE PRESENT ALONG THE COAST
    THURSDAY NIGHT THROUGH FRIDAY WHICH WILL LEAD TO HAZARDOUS COASTAL
    CONDITIONS.
    PERSONS IN THE SAN FRANCISCO AND MONTEREY BAY REGION WITH OUTDOOR
    PLANS FRIDAY AND SATURDAY SHOULD CLOSELY MONITOR THE LATEST
    FORECASTS. IN ADDITION, PERSONS LOCATED NEAR STREAMS OR LOCATIONS
    PRONE TO FLOODING SHOULD BE PREPARED FOR VERY RAPID RISES AND THE
    POTENTIAL FOR FLOODING.

event calendar sponsored by: