US National Weather Service San Francisco Bay Area/Monterey California

A look at some forecast peak wind gusts around our area through Thursday afternoon. Wind Advisory is in effect Wed evening through Thurs morning.

Fancy nighttime satellite imagery shows much drier air in our region. Those few white patches are low marine stratus clouds. 24 hours ago most of the Bay Area & Monterey Bay was covered in stratus, but that's not the case now!

Breezy to locally windy conditions are forecast from Tuesday through Thursday, with strongest winds expected Wednesday afternoon and evening. West to northwest winds are forecast to gust locally as high as 50 mph near the coast and in the hills.

A look at today's forecast MaxTs. Another cloudy and cool day along the coast with sunny conditions and closer to normal temperatures inland. #MayGray #CAwx

Not quite ready to go to bed just yet? Maybe this quick thread on some of the science behind our favorite natural AC will help! https://twitter.com/NWSBayArea/status/1394210711765536768

Everywhere you look (everywhere you look) there's stratus. Another cloudy night is in store for the City by the Bay and much of the region as the marine layer deepens and promotes more inland stratus. Could see a few misty spots on the coast again by morning! #CaWx

Skies quickly cleared this morning over the North Bay and continue to rapidly clear this afternoon in the City as the dry air mass begins to move in to the region. Winds are also starting to pick up in the high-elevation areas of the North Bay. #CaWx #CaFire

With these #DiabloWinds expected to bring the most critical Red Flag conditions of the season, now is a great time to review your emergency plans. Be sure to also be on the lookout for any updates from CAL FIRE in the event of a wildfire start. #Cawx

Forecast wind gusts from Sunday morning through Monday evening. Offshore winds (blowing from the north and northeast) are expected to increase from north to south from late Sunday morning through Sunday evening. Winds will then peak across the San Francisco Bay Area on Sunday night and early Monday before gradually decreasing for the remainder of Monday. Red Flag Warnings go into effect starting at 11 am and Wind Advisories begin at 4 pm. All Red Flag Warnings and Wind Advisories are for the San Francisco Bay Area. Winds are expected to be much lighter from Monterey Bay southward.

A Red Flag Warning goes into effect for much of the Bay Area later today. Peak period of concern will roughly be from 6 pm Sunday night through about 7-10 am Monday when winds will be strongest.

Red Flag Warning starts Sunday morning with a Wind Advisory beginning later on Sunday. But different areas begin and end at different times Our meteorologist made a video forecast for you to break down the event (Run time: 5:02)... youtu.be/9EQC6iwL-Xs See more

The High Wind Watch has been updated to a Wind Advisory from 4 PM PDT Sunday until 11 AM PDT Monday.

More details of the upcoming wind and fire weather event. Here's a look at one computer model. First let's take a look at winds (L image) - Wind will rapidly increase early Sunday and peak Sunday evening into Monday morning. Winds will be gusty in the hills and valleys. Now for the fire weather threat - as the north winds kick in watch the humidity values plummet (pink <10%) (R image). Gusty winds + low humidity + crispy dry fuels = very critical fire weather conditions. Be alert and have a plan. #cawx #cafire #OneLessSpark

We have overlapping Red Flag Warnings this weekend. The first starts 11am Sunday and lasts until Tuesday morning. The second starts 8pm Sunday and is shorter: ending Monday morning. The image below showing the timing of different zones and what to expect.

The Fire Weather Watch has been upgraded to a Red Flag Warning beginning Sunday morning for higher elevations, and then includes lower valleys surrounding the Bay Area by Sunday evening. Winds are expected to be the strongest of the 2020 fire season with critically dry conditions. While strongest winds are currently forecast for the Sunday night into Monday morning timeframe, this warning is currently set to expire Tuesday morning at 11 AM due to the dry conditions.

Day 7 #CAFloodPrepWeek - King Tides occur during new moons when the earth's elliptical orbit is at its closest pass to the sun (perihelion). These gravitational forces result in extreme tides called King Tides. The next King Tides will arrive in November and December 2020.

A High Wind Watch has been issued from Sun 4 pm to Mon 10 am for the North & East Bay, SF Peninsula & Coast, SF Bay Shoreline, Santa Clara Valley, and Santa Cruz County. The strongest winds are expected during the overnight hours Sunday night into Monday morning.

***This product has been upgraded. Please visit most recent post for accurate forecast information.*** A Fire Weather Watch has been issued for the North Bay Mountains and Valleys, East Bay Hills and Valleys, Diablo Range, and Santa Cruz Mountains and is valid from 11 AM PDT Sunday 10/25 through 11 AM PDT Tuesday 10/27. Expect offshore winds from 25 to 35 mph and gusts from 40 to 60 mph. Stronger 70+ mph gusts may be possible over favored ridges and peaks during the night and morning hours mainly the North and East Bay. Peak winds over the higher elevations will likely be Sunday night into Monday morning. The forecast is calling for very dry conditions with daytime relative humidity from 5 to 15 percent and limited overnight humidity recoveries ranging between 15 and 30 percent.

***This product is no longer valid. See recent posts for updated forecasts.*** The Santa Cruz mountains and San Mateo coast has been removed from the current Red Flag Warning but the Warning continues for the North Bay Mountains, East Bay Hills and Interior Valleys, as well as the Diablo Range.