The Red Flag Warning has been extended and will now be in effect from 1 PM Thursday (10/1) to 6 AM Saturday (10/3).
ORIGINAL MESSAGE 9/30/20
The National Weather Service has issued a RED FLAG WARNING for the North Bay Mountains above 1000 feet, specifically the Glass Fire, from 1 PM Thursday (10/1) to 6 PM Friday (10/2) due for breezy northerly winds and critically dry conditions. The Fire Weather Watch is no longer in effect.
WEATHER EVENT DETAILS:
* WIND: North winds through Thursday morning will push across Napa county and impact the Glass Fire and the hills above Calistoga, potentially pushing the fire towards Angwin. Increasing northwest winds arrive Thursday afternoon during the peak of the burn period along with very low humidity. Northwest winds increase Thursday night into Friday morning with gusts 25 to 30 mph with little or no humidity recovery. Breezy northerly winds continue through the Friday burn period with continued hot temperatures.
* HUMIDITY: 15 to 25 percent but locally 8-12 percent with little or no nighttime recovery in the hills.
* HIGHEST THREAT: Active portions of the Glass Fire or those areas with unsecured or open fire line.
* IMPACTS: Fire will spread rapidly due to the combination of hot temperatures, very dry fuels, breezy northerly winds and low humidity.
PRECAUTIONARY/PREPAREDNESS ACTIONS: 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.
City of Santa Rosa Preparedness Information: