SACRAMENTO, Calif. (KTXL) — An unseasonably wet September weather system is rolling into Northern California this weekend with breezy conditions and measurable rain.

The Sacramento and Northern San Joaquin Valleys will likely receive one to two inches of rain between Sunday and Wednesday while the Sierra foothills receive two to three inches. The bulk of the rain will fall Sunday and Monday in the form of scattered showers with occasional heavy downpours. The rain will have a dampening effect on wildfires.

The National Weather Service is reminding drivers to plan for slick roads and longer-than-normal commute times.

Snow will not likely impact travel as snow levels will be above the drivable Sierra passes, near 9,000 feet.

Under cloudy skies, Valley temperatures will rise only into the low 70s Sunday and Monday while Tahoe area temperatures peak near 60 degrees.

The National Weather Service has issued a flash flood watch for the Mosquito Fire burn scar to be in effect Tuesday afternoon through Tuesday evening. There is concern that heavy downpours of rain from thunderstorms could cause ash and lose debris to wash away.

The warning states, “Residents near the Mosquito burn scar should prepare for potential ash and debris flow impacts. Be sure to stay up to date with information from local authorities. Areas with steep terrain will be especially at higher risk for ask and debris flows.”

A flash flood watch is a lower level of concern than a warning but could be upgraded to a warning if conditions warrant it.

The end of the week offers a warming trend with a return to sunny skies and highs in the 80s.