National Weather Service issues flood watch for King County

February 21, 2012

By Warren Kagarise

NEW — 6 a.m. Feb. 21, 2012

National Weather Service meteorologists issued a flood watch for King County late Monday, as rain continues to pelt the region.

The flood watch is in effect for King County and other Western Washington counties until Thursday afternoon.

Meteorologists said heavy rain is forecast in the Cascades through Wednesday morning. The snow level is expected to rise to 6,000 to 7,000 feet above the Central Cascades during the same period.

Though the highest flooding risk is for rivers flowing from the mountains, increased precipitation in the area could cause Issaquah Creek to rise.

City officials base Issaquah Creek flood warnings on real-time data from a gauge upstream from Issaquah in Hobart. The system usually provides hours of lead time before flooding impacts Issaquah.

Officials also monitor a gauge at the creek mouth in Lake Sammamish State Park.

Though the gauges recorded increases in creek flow early Tuesday morning, neither gauge reached a flood phase for Issaquah.

Under a flood watch, favorable conditions for flooding exist, but flooding is not imminent or occurring. National Weather Service meteorologists said resident should monitor forecasts and prepare to act quickly if a flood warning is issued.

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