RED FLAG WARNING IN EFFECT SAN FRANCISCO BAY AREA

Tuesday, October 25, 2011

RED FLAG WARNING IN EFFECT SAN FRANCISCO BAY AREA

RED FLAG WARNING

DRY NORTHERLY WINDS WILL DEVELOP TONIGHT ACROSS THE NORTH AND EAST BAY HILLS AND MARIN/SONOMA AND NAPA COUNTIES. THE AREA OF STRONGEST WINDS WILL BE THE HILLS OF NORTHERN AND EASTERN NAPA COUNTY AS WELL AS AROUND MOUNT ST HELENA.

STRONGEST WINDS WILL OCCUR AFTER MIDNIGHT TONIGHT THROUGH ABOUT MIDDAY WEDNESDAY. HOWEVER DRY OFFSHORE WINDS WITH VERY LOW HUMIDITY WILL CONTINUE AGAIN WEDNESDAY NIGHT THROUGH SUNRISE THURSDAY, ESPECIALLY IN THE EAST BAY HILLS

RED FLAG WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM PDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTH BAY HILLS ABOVE 1000 FEET IN MARIN/SONOMA AND NAPA COUNTIES...

AFFECTED AREA: HILLS ABOVE 1000 FEET IN MARIN/SONOMA AND NAPA COUNTIES. THE AREA OF STRONGEST WINDS WILL BE THE HILLS OF NORTHERN AND EASTERN NAPA COUNTY AS WELL AS AROUND MOUNT ST HELENA.

WINDS: NORTH TO NORTHEAST WINDS SUSTAINED 15 TO 25 MPH WITH FREQUENT GUSTS 35 TO 40 MPH. STRONGEST WINDS WILL OCCUR LATE TONIGHT THROUGH MIDDAY WEDNESDAY.

RELATIVE HUMIDITY: DROPPING BELOW 30 PERCENT TONIGHT AND THEN STAYING BETWEEN 15 AND 25 PERCENT WEDNESDAY THROUGH THURSDAY WITH NO NIGHT TIME RECOVERY.

IMPACTS: ANY IGNITIONS DURING THE PERIOD OF STRONGEST WINDS COULD LEAD TO NEW FIRE STARTS THAT WILL BE DIFFICULT TO SUPPRESS WITH RAPID RATES OF SPREAD.

Instruction: 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 WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.
Area: NORTH BAY MOUNTAINS-MARIN/SONOMA AND NORTHERN AND EASTERN NAPA COUNTY AS WELL AS AROUND MOUNT ST HELENA.
Affected Counties or parts of: San Francisco, Santa Cruz, San Mateo, Marin, Monterey, Contra Costa, Napa, San Benito, Sonoma, Santa Clara, Alameda

California Fire News 2011

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How fires get their names

Every year in California thousands of wildfires start throughout the state. In most cases, the dispatch center sending the initial resources to a wildland fire will designate a name for the fire, but the first on scene engine or fire official can also name the incident. Fires are usually named for the area in which they start – a geographical location, local landmark, street, lake, mountain, peak, etc. Quickly naming the fire provides responding fire resources with an additional locater, and allows fire officials to track and prioritize incidents by name. For example during the Southern California Fire Siege of 2003, the largest wildland fire in California history, the Cedar Fire in San Diego County, was named after the Cedar Creek Falls area where it started. The destructive Old Fire, which burned during the same time period in San Bernardino County, was named after the road along which it started - Old Waterman Canyon Road.

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Tuesday, October 25, 2011