FLASH FLOOD WATCH FOR: East Slopes Northern Cascades Okanogan Valley Wenatchee Area ...Heavy rainfall may lead to flash flooding along the east slopes of the northern cascades... .A band of moderate to heavy rainfall is expected to develop in the cascades from wednesday morning into the afternoon. This band will also contain some embedded thunderstorms with locally heavier rainfall rates possible with flash flooding possible. Thunderstorms will continue to be possible into wednesday evening. Areas of greatest concern will be in and around recent burn scars from wildfires that burned in 2012...2013 and so far into 2014. ...Flash flood watch in effect from wednesday morning through wednesday evening... The national weather service in spokane has issued a * Flash flood watch for a portion of north central washington... Including the following areas...East slopes northern cascades...Western edge of the okanogan valley and wenatchee area. * From wednesday morning through wednesday evening. * A moist low pressure system will produce a band of moderate to heavy rainfall over the east slopes of the northern cascades. Embedded in this band will be the potential for some thunderstorms with very heavy rainfall rates. Thunderstorms will continue to be possible over the area into the evening hours. * Heavy rainfall may lead to flashing flooding or mud and debris flows. The areas of greatest concern will be in and around the recent burn scars from wildfires in 2012...2013...And so far through 2014. This includes the following burn scars... The carlton complex fire affecting residents...Businesses...And motorists in the methow valley. This includes motorists on us highway 97 from chelan to brewster and state highway 153 from pateros to twisp. The mills canyon fire affecting residents and motorists in mills and other nearby canyons in the entiat river valley...As well as motorists below the burned areas on entiat river road and u.S. Highway 97a. The lone mountain fire in the steheking river valley affecting residents and recreationists in and below boulder creek and those on the stehekin river road below the boulder creek drainage. The canyon...Poison... And peavine fires above the cities of cashmere and wenatchee. The byrd canyon fire affecting residents and motorists in crum canyon...Oklahoma gulch...And byrd canyon as well as highway 97 below the canyons. The first creek fire...Affecting residents and motorists along first creek and in the lake chelan state park...As well as those residents that live at the mouth of granite creek. The goat fire affecting residents and motorists in spray canyon and along antione creek. The colockum-tarps fire affecting residents and motorists along colockum creek and below tarpiscan road. The eagle fire affecting residents and motorists in bjork canyon and eagle creek road. The chiwaukum creek fire affecting highway 2 at colockum creek. A flash flood watch means that conditions may develop that lead to flash flooding or debris flows. It takes as little as ten minutes of heavy rain to cause flash flooding and debris flows in and below areas affected by wildfires. Rain runs off almost instantly from burned soils...Causing creeks and drainages to flood at a much faster rate than normal. Soils in a burn scar can also become unstable when it rains...Sometimes resulting in debris flows and falling rock. Rushing water and debris...Including trees and rocks...Can damage or destroy culverts...Bridges...Roads...And buildings. Flash flooding and debris flow paths are unpredictable and can affect locations that are miles away from a burned area. For a detailed view of the hazard area visit Wrh.Noaa.Gov/wrh/whv/?Wfo=otx
Posted on: Tue, 22 Jul 2014 20:00:34 +0000
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