The first storm in a two-part series has made its way to Southern California before the main storm begins Thursday, increasing the danger of flash flooding.

Monahan says there will be periods of heavy rain throughout Wednesday and a flood watch remains in effect until Thursday morning. There is some risk for a strong storms or even some severe storms to develop over west Georgia late Wednesday night into early Thursday.

The first wave of the strongest storm of the winter began hitting Southern California on Wednesday, but the most damaging rains are expected Thursday.

A flash flood watch has been issued for much of Los Angeles and Ventura counties ahead of two rainstorms that will increase the potential of debris flow in burn scar areas.

Flames burned through brush and vegetation, reducing the soil’s ability to absorb water — allowing water to possibly flow quickly, picking up debris and creating dangerous mudslides, debris flows and flash flooding.