| 73.4 | the Chehalis River in Lewis County will cause severe near record flooding...with deep and swift flood waters inundating residential and business areas...roads including I-5...and farms. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin. A stage of 73.4 feet corresponds to a Phase IV flood in the Lewis County flood system. | | 72.0 | the Chehalis River in Lewis County will cause major flooding...inundating residential and commercial areas...farms...and many roads including I-5. Flood waters will be deep and swift in some areas. Flooding will occur all along the river including headwaters...tributarieas...and other streams within and near the Chehalis River Basin. A stage of 72 feet corresponds to a Phase III flood in the Lewis County flood system. | | 68.5 | the Chehalis River in Lewis County will flood some residential and commercial areas...with water encroaching upon the first floor of some homes and businesses. Swift flood waters will cover some roads. A stage of 68 feet corresponds to a Phase II flood in the Lewis County flood system. | | 65.0 | the Chehalis River in Lewis County will cause shallow flooding of farm lands and some roads. A stage of 65 feet corresponds to a Phase I flood in the Lewis County flood warning system. | | 63.0 | the Chehalis River in Lewis County will spill over its banks into nearby pasture lands around Chehalis and Centralia. |
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1) 74.78 ft on 12/04/2007
2) 74.31 ft on 02/09/1996
3) 73.50 ft on 01/10/1990
4) 72.40 ft on 01/08/2009
5) 71.99 ft on 11/25/1986
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Low water records are unavailable.
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