Petaluma Under Flood Watch, Coastal Flood Advisory

PETALUMA, CA — Petaluma residents should monitor later forecasts and be alert for possible flood warnings Friday and Saturday, the National Weather Service said.

A flood watch is expected to go into effect at 2 p.m. Friday afternoon and continue through 4 p.m. Saturday during significant rainfall forecast for the Marin Coastal Range, Sonoma Coastal Range, North Bay interior mountains, Coastal North Bay including Point Reyes National Seashore and North Bay interior valleys.

Expected rainfall totals are 2-3 inches in the valleys and up to 5 inches in the higher elevations. Excessive runoff may result in flooding of rivers, creeks, streams and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks, and flooding may occur in poor drainage and urban areas, the weather service said. Those living in areas prone to flooding should be prepared to take action should flooding develop.

The cities and towns under flood watch are Tamalpais-Homestead, Novato, South Santa Rosa, Rohnert Park, Napa, Santa Rosa, San Rafael, Sausalito, Woodacre, Lagunitas-Forest Knolls, Petaluma and Angwin.

Coastal Flood Advisory

A National Weather Service coastal flood advisory was also issued. It remains in effect from 6 a.m. Thursday to 1 p.m. Monday.

Minor coastal flooding is expected along San Francisco Bay and San Pablo Bay. Parking lots, parks and roads are forecast to flood. Isolated road closures are expected.

Tidal levels are increasing as a result of higher astronomical tides. Low-lying areas within the San
Francisco Bay Area may see minor flooding during the following high tides:

• 6.74 feet at 8:12 a.m. Thursday
• 6.98 feet at 8:54 a.m. Friday
• 7.07 feet at 9:37 a.m. Saturday
• 7.02 feet at 10:22 a.m. Sunday
• 6.82 feet at 11:08 a.m. Monday

Those who need to travel should allow extra time as roads may be closed. Drivers should not go around barricades or through water of unknown depth, the weather service said.

7-Day Petaluma Weather Outlook

Thursday

Rain likely, mainly between 10am and 4pm. Mostly cloudy, with a high near 56. West wind 8 to 14 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday Night
Rain likely, mainly after 4am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 44. West wind around 6 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday
Rain likely, mainly after 4pm. Patchy fog before 7am. Otherwise, cloudy, with a high near 57. Southeast wind 7 to 14 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night
Rain. Low around 47. South southeast wind 14 to 18 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

Saturday
Rain, mainly before 4pm. The rain could be heavy at times. High near 59. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Saturday Night
A 50 percent chance of rain before 10pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 37.

Sunday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 58.

Sunday Night
Rain likely after 4am. Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 38.

Monday
Rain. Cloudy, with a high near 55.

Monday Night
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 42.

Tuesday
A slight chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 61.

Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 38.

Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 61.