Storms are expected to blanket Marin in rain which could impact commuter traffic throughout the week.
The first storm system is expected to bring no more than a quarter inch of rain to low-lying Marin from Monday evening through Tuesday, National Weather Service meteorologist Matt Mehle said. Mount Tamalpais can see up to half an inch of rain.
It is considered a weaker than storm system that currently lingers over British Columbia and is expected to bring rain to Marin from Wednesday evening through Friday. The second system includes a cold front off the California coast, which is expected to bring up to 0.75 inches of rain at low elevations and over an inch of rain at high elevations.
“This second system is going to be stronger and has a better amount of moisture associated with it,” Mehle said.
The strongest system also includes the slight risk of thunderstorms and small hail on Thursday.
The system is considered beneficial rain and is unlikely to cause flooding. The rains should generate impacts on commuters from Tuesday morning to Friday.
The storms follow two storm systems that brought several inches of rain to Marin last week.
A storm that passed through April 15-16 brought 1.25 inches of rain to Mount Tamalpais and 1.14 inches to the Point Reyes National Seashore. Kentfield saw just under an inch of rain, Mill Valley had 0.66 inches of rain and Novato had 0.28 inches of rain.
The Marin Municipal Water District recorded 47.67 inches of rain from July through Sunday. The total is 97.62% of the average rainfall of 48.83 inches for the date. Reservoirs in the Marin area are at 72,282 acre-feet, or 90.85% of capacity.