The Cowlitz River at Castle Rock gauge in Longview, WA reached 33. 3 feet at 6:30 AM PT on July 9, 2026, placing the river at major flood stage. The USGS monitoring station reports the river is currently above the configured flood stage threshold of 18 feet.
Residents near the Cowlitz River are advised to monitor conditions closely and follow guidance from local emergency management officials. The USGS warning notes that rivers can rise rapidly during heavy rain or snowmelt events, with low-lying areas potentially experiencing flooding.
The National Weather Service provides real-time river data through the USGS monitoring location 14243000, with additional weather updates available at weather.gov. Emergency management officials are monitoring the situation as the river continues to rise.