NWS Issues Hydrologic Outlook for Blue Mountain Rivers and Streams

Got story updates? Submit your updates here. ›

The National Weather Service office in Pendleton has issued a hydrologic outlook for the Blue Mountains and Washington Cascades, warning of heavy rain and mountain snow through Friday evening followed by unusually warm temperatures over the weekend. This is expected to lead to high water levels on many streams and rivers, with several reaching action stage by Friday evening, though not expected to reach flood stage.

Why it matters

The hydrologic outlook is important for local communities and agencies to be prepared for potential high water levels and minor impacts along the affected rivers and streams in the Blue Mountains and Washington Cascades region.

The details

According to the NWS, the following rivers are forecasted to reach action stage by Friday evening: Grande Ronde River at Troy, Umatilla River at Gibbon, Walla Walla River at Touchet, Klickitat River near Pitt, and Naches River at Naches. The action stage means possible high water that could cause minor impacts, and local governments or agencies may take actions. The high water levels are expected to continue throughout the weekend before receding early next week. The NWS also noted that water temperatures have dropped into the lower 40's, increasing the chances for hypothermia.

• As of Friday morning, the rivers are forecasted to reach action stage by this evening.
• The action stage is expected to continue throughout the weekend before receding early next week.