A chance of dry lightening hitting areas including the San Mateo County hills through Tuesday has prompted the National Weather Service to issue a red flag warning for fire danger, a forecaster said.
A low pressure system moving through the Bay Area brings with it a chance of showers, isolated thunderstorms and dry lightning through Tuesday, National Weather Service forecaster Bob Benjamin said.
Lightning strikes combined with extremely dry conditions across inland hills and valleys could bring significant fire danger, prompting the red flag warning for counties in the North and East Bay across San Mateo County to the Santa Cruz Mountains, Benjamin said.
Though there is a 20 to 30 percent chance of rain accompanying the front, there is "little chance of rain ever hitting the surface," Benjamin said.
Cal Fire has said additional firefighters will be placed on duty during the heightened fire danger.
The red flag warning went into effect late Sunday night and will remain in effect until noon Tuesday.