The National Weather Service has issued a Red Flag Warning for East Bay Hills and Valleys which is in effect from 11:00 P.M. Friday, May 7 to 6:00 A.M. Monday, May 10.
A moderate early-season offshore wind event will develop this weekend. This will occur as fuels are near record dry levels after a very dry winter. The initial burst of dry offshore winds will reach the Napa county hills around 11 pm Friday night and then spread across the East Bay overnight into early Saturday. These winds will usher in much drier air along with wind gusts in excess of 50 mph above 2000 feet. On Saturday breezy north winds will continue as temperatures warm well into the 80s with humidity values lowering into the teens and single digits. This pattern will help to rapidly dry out the fine fuels through the weekend. There may be some moderate humidity recovery Saturday night but warm and dry weather persists Sunday with continued dry northerly winds and warm temperatures that will allow for rapid-fire spread on any new ignitions, especially in the grass and dry brush.
A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.
- Please exercise extra caution when grilling.
- If possible, avoid using lawnmowers, chain saws or other such devices in dry vegetation areas
For more information go to https://www.weather.gov/mtr//