The National Weather Service office in Los Angeles is putting millions on alert for a “very significant and dangerous” storm that has the potential for flash flooding and possible tornadoes early this week.

A dip in the jet stream opens the door for storms bringing abundant moisture to funnel into the West Coast.

A series of storms will slam the coast, delivering high winds, strong waves, heavy rain and severe storms, as an atmospheric river targets the state.

Rain will keep things very active in Southern California, where 3–5 inches of rain is possible, with localized higher amounts expected.

Creeks and rivers could rise quickly, and urban flooding is possible around Los Angeles.

A sneaky risk of severe weather is ushered in with rain on Monday. The severe storm threat will spread across the Los Angeles basin, potentially producing waterspouts that come ashore. If this occurs, it could produce tornadoes.

Of the 49 tornadoes that have occurred in Los Angeles County since 1950, only 9 of them have been during the winter months, according to the FOX Forecast Center.

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