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Rain, Runoff Ramp Up Flood Threats Along Bay Area Rivers


As rain continues to soak the waterlogged Bay Area Thursday, eyes remain glued on swelling rivers and streams that have already or are predicted to surge above flood stage.

Much of the region remains under a flash flood watch through Thursday morning as an atmospheric river continues to batter the region with heavy rain and damaging winds.

In San Jose’s Willow Glen neighborhood, evacuations were ordered early Thursday morning as a portion of the Guadalupe River crested above flood stage. Water levels eventually receded, allowing officials to lift the evacuation orders.

In the North Bay, rainfall continues to soak already saturated soil, causing runoff to flow over numerous roadways, rivers to rise rapidly and a mudslide to dislodge a Sausalito home from its foundation.

The California Highway Patrol reported that a levee breached in Novato, sending a torrent of water toward a field near State Route 37. The flooding could force the closure of State Route 37 between Highway 101 and Atherton Avenue.

An areal flood warning remains in effect until 2:45 p.m. Thursday for southeastern Marin County, according to the weather service. San Rafael, Novato and Mill Valley are just some of the areas that could face flooding.

“Do not attempt to cross flooded roadways!” the weather service warned.

In neighboring Napa County, a flood warning has been declared until 6:26 p.m. Thursday for areas along the Napa River near St. Helena, the weather service reported. Downstream near Napa, a flood warning will kick in around 11 a.m. Thursday.

Officials in the North Bay will also be keeping an eye on the Russian River, which is slated to cross above flood stage by Thursday afternoon and continue to rise into the evening hours, according to the weather service. Beginning at 4 p.m. Thursday, a flood warning will take effect along the river at Johnsons Beach near Guerneville.

Continuing this winter’s soggy trend, the midweek storm inundated the Bay Area with multiple inches of rain between Tuesday morning and Thursday morning, according to the weather service. Venado in Sonoma County picked up a whopping 12.44 inches of rain during that 48-hour period. Mt. Umunhum in the South Bay collected 6.65 inches. Cazadero in western Sonoma County received 6.28 inches.

Among the Bay Area’s larger cities, Santa Rosa accumulated 4.77 inches of rainfall during the two-day period, according to the weather service. San Francisco tallied 3.13 inches. Concord grabbed 2.01 inches.

Photo Credit: NBC Bay Area
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Source: NBC Bay Area

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