FLASH FLOOD WARNING for fire damaged areas - NBC Right Now/KNDO/KNDU Tri-Cities, Yakima, WA |

FLASH FLOOD WARNING for fire damaged areas

Posted: Updated:

KHQ.COM - According to the Washington Interagency Incident Management Team, potential afternoon thunderstorms expected Wednesday are a concern for the Carlton Complex fire because of the possibility of heavy rain and lightning strikes. Even a moderate 10-minute rain can cause flooding, debris flows, and landslides.

NOTE: A flash flood warning has been issued from the National Weather Service.

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 late Wednesday morning and into the afternoon. This band will also contain some embedded thunderstorms with locally heavier rainfall rates that could lead to flash flooding.

Thunderstorms will continue to be possible into Wednesday evening. Some thunderstorms may produce strong winds and small hail. The highest threat of storms comes between 1 pm and 9 pm.

Take precautions and be prepared:

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.

Areas of greatest concern will be in and around recent burn scars from wildfires that burned in 2012, 2013 and so far into 2014. This includes the following burn scars:

  • The Carlton Complex fire affecting residents, businesses, and motorists in the Methow Valley and portions of the Okanogan 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 Canyon 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 Stehekin 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.

For a detailed view of the hazard area visit:

http://www.wrh.noaa.gov/wrh/whv/?wfo=otx



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