TIMELINE: What to expect as atmospheric river impact to become more widespread across Bay Area

SAN FRANCISCO (KGO) -- Heavy rain and flood risk continue in the North Bay Thursday before our atmospheric river is on the move Friday, bringing rain and wind to the whole region.

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THURSDAY

Throughout the day expect rain, heavy at times in the North Bay where there is the risk of more flooding on streams, creeks and roads. A Flood Watch is currently in effect. Rainfall totals will range from 1" - 4"+. Outside of the North Bay, expect a lighter showers with rainfall totals less than .50".

• Morning: Heaviest rain continues in the North Bay with alevel 2 on the ABC7 Storm Impact Scale.
• Afternoon and Evening: Storm downgraded to a level 1 for the rest of the day as the atmospheric River lifts north giving a bit of a break to the North Bay.

LIVE: Track rain in San Francisco Bay Area with Live Doppler 7

FRIDAY

A better chance for widespread rain and wind will occur with rainfall totals ranging from 1" - 3" across the entire Bay Area. This is a level 2 moderate storm.

• Morning: Storm Impact Scale upgraded to level 2 as atmospheric river is on the move south. Pockets of heavy rain and gusty winds mainly San Francisco and Oakland.
• 11 a.m.: Heaviest rain focused in the South Bay.
• Afternoon and Evening: Scattered downpours, gusty winds and chance for a thunderstorm.

FLOOD WATCH continues for the North Bay until Saturday morning.

HIGH SURF ADVISORY continues until Friday at 6 a.m.

WINTER STORM WATCH begins Friday afternoon, lasting until Tuesday. 1 to 4 feet of snow above 5,500 ft.