(FOX40.COM) — Soon after the first significant snowfall and rain of the current water year in Northern California, a Red Flag Warning has been issued in parts of Northern California, stretching from the South Bay to Redding, according to the National Weather Service.

The warning will begin at 5 a.m. on Saturday and last through 5 p.m. on Sunday as gusty north-to-east winds along with low relative humidity are expected throughout parts of the Bay Area and the Central Valley.

The region under the warning stretches from areas south of the Bay Area east to Tracy, and north all the way to Shasta County.

Winds are expected to be between 15 to 25 MPH with gusts up to 40 MPH.

These combined weather conditions cause unsafe fire conditions as they allow flames to quickly spread through dry vegetation.