Cal Fire issues Red Flag Warning for parts of Solano County, Modesto

Cal Fire issued a Red Flag Warning Monday afternoon for areas primarily focused around Sacramento, Modesto and Stockton. Areas in Solano County, including Vallejo, and San Joaquin County are also affected. Today's warning is in effect until 8 p.m. Monday.

This warning system is typically used to indicate that some weather events, like wind, could increase the likelihood of "extreme fire behavior" in the following 24 hours.

"The type of weather patterns that can cause a watch or warning include low relative humidity, strong winds, dry fuels, the possibility of dry lightning strikes, or any combination of the above," Cal Fire states on its website.

The National Weather Service in Sacramento reported current northwesterly winds of up to 15-20 mph and gusts up to 30 mph. Combined with low humidity, the conditions could increase the possibility of grass fire ignition and spread across the region.

The warning was also issued for parts of Los Angeles and Southern California.

Alyssa Pereira is an SFGate digital editor. Email: alyssa.pereira@sfgate.com | Twitter: @alyspereira