The following alert was sent from Alameda County on Friday afternoon:
This is an AC Alert from Alameda County. The National Weather Service has issued a Red Flag Warning, which is in effect from 9 PM Saturday to 8 AM Monday due to high winds and dry conditions. The greatest threat will be in elevations above 1,000 feet across these region, particularly in the East Bay Hills.
From the National Weather Service:
A Red Flag Warning is now in effect from Saturday night through Monday morning as breezy to locally gusty offshore winds develop over the North Bay Mountains and East Bay Hills/Interior Valleys. The greatest threat will be in elevations above 1,000 feet across these regions. These winds will combine with critically low humidity resulting in critical fire weather conditions. In these conditions, any ongoing fires or new fires will have the potential to rapidly spread.
Definition of a Red Flag Warning:
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.