Here's How Much Rain Has Fallen In Napa County

NAPA COUNTY, CA — Several streams and creeks were rapidly rising Monday morning around the North Bay as an atmospheric river drenched the region.

The waters of Napa Creek, Corte Madera Creek and Santa Rosa Creek were significantly rising, the weather service said on social media.

The water level of Napa Creek at state Highway 29 rose from 3 feet at 8 p.m. to 6.04 feet as of 8 a.m. Monday, according to the National Weather Service. Flood stage is 10 feet.

Santa Rosa Creek near Willowside Road in Santa Rosa rose to 63.26 feet Monday morning from 58 feet Sunday morning. Flood stage for the creek is 70 feet.

In addition to locally heavy rain, the potent weather system was also bringing strong winds, and hazardous marine conditions.

Flood advisories were extended through 10:30 a.m. Monday around the San Francisco Bay shoreline and in the Santa Cruz Mountains due to roadway flooding and moderate to heavy rainfall.

"While mainstem river flooding isn't currently anticipated, heavy rain will lead to rapid rises on area rivers, streams, and creeks," the National Weather Service said.

Here's How Much Rain Fell In Napa County

Below are preliminary 24-hour rainfall totals as of 11:17 a.m. Monday*:

• Mount St. Helena 1.10 inches
• Petrified Forest 1.53 inches
• Angwin 2.76 inches
• St. Helena 2.40 inches
• St. Helena-Sulphur Creek 2.44 inches
• Conn Dam 1.89 inches
• Dry Creek Fire Station 3.11 inches
• Mount Veeder 4.97 inches
• Hwy 29 @ Hopper Creek 3.79 inches
• Atlas Peak 4.35 inches
• Redwood @ Mt. Veeder 1.02 inches
• Mount George 2.48 inches
• Napa-Lincoln Bridge 2.99 inches
• Napa-Corp Yard 3.03 inches

Rain Continues; Thunderstorm Possible

Through Tuesday, forecasters expect the North Bay valleys to see another inch or less of rain, while locations in the coastal ranges may receive more than an inch.

In the Napa Valley, more showers and possibly a thunderstorm were forecast before 1 p.m. Monday, followed by a 100-percent chance of rain after 1 p.m. Monday, the weather service said.

Rain is expected to continue until 4 a.m. Tuesday, with the chance of rain falling to 40 percent through 10 a.m. Tuesday for the Napa Valley.

Another weaker system arrives mid-week, bringing light precipitation and much colder temperatures by Friday night, the weather service said.

"This system, while weaker than the previous one, may bring an inch or so of precipitation to parts of the area," the National Weather Service said. "Rain and low elevation snow are possible given the colder air with this system. Cold temperatures should prevail for late week with frost and freezing temperatures possible for many areas."

*National Weather Service note: The rainfall report contains provisional data from automated gauges. The accuracy of the data has not been verified.

Bay City News Service contributed to this report.