Most of Western Washington will be under a flood watch Thursday as lots of rain, thunder and lightning is forecast for the region.
KING 5 Meteorologist Lisa Van Cise says the area could reach the average total rainfall for the entire month of September by Friday afternoon.
Some areas already received thunderstorms early Thursday morning. Most areas will see scattered rain through mid-afternoon Thursday before the rain picks up. Thunderstorms are likely to increase late Thursday afternoon and evening. Highs will be in the upper 60s to low 70s.
The rain is likely to stick around through much of Friday. Most of the rain will fall along the coast and in the Cascades, but 24-hour rain totals in the Central Puget Sound area could reach two inches before it s over.
A flood watch is in effect for most of Western Washington until Friday afternoon with possible urban and small stream flooding. Mud or rock slides are also possible in steeper terrain. Parts of Eastern Washington are under a flash flood watch.