ILWACO - High flows are predicted by the National Weather Service on the Columbia River downstream of Bonneville Dam this week.
Heavy rains and snow melt throughout large portions of Washington and Oregon during the past several days are leading to increasing water flows along the Columbia. Current river forecasts for the Columbia near Longview indicate that river levels will exceed bank-full levels during the high-tide cycle through at least Thursday, but stay below flood stage. Flood stage at the Longview gage is 13.5 feet, bank-full is 12.0 feet.
The Columbia River may reach 12.5 feet during the high tide around 8:30 p.m. Wednesday and just over 13 feet around 745 a.m. Thursday. The gage near the Interstate 5 Bridge in Vancouver is forecast to get close to 15.5 feet during the high tides through at least Thursday. Flood stage at the gage at Vancouver is 16 feet.
These are higher than normal springtime river flows for the Lower Columbia. These type of flows will likely inundate some normally dry low lying areas, including areas used for camping such as on Government Island.
Now would be the time to take any mitigating actions should these types of flows cause any problems to low lying properties.