Seattle, Washington – Washington is expected to experience a warmer and somewhat more active weather pattern between July 23 and July 27, with above-normal temperatures expanding across much of the Evergreen State while periodic weather systems bring opportunities for showers and isolated thunderstorms. Although many areas will enjoy extended periods of dry weather, localized rainfall and lightning are expected to develop, particularly across the Cascades and eastern Washington during the afternoon and evening hours.
According to the National Oceanic and Atmospheric Administration’s Climate Prediction Center, in its 6-10 Day Outlook issued July 17, Washington is favored to experience above-normal temperatures during the July 23-27 period. The state is also included in an area favoring above-normal precipitation, increasing the likelihood of more widespread shower activity than is typical for late July.
In Seattle, temperatures are expected to climb above seasonal averages as a warmer air mass settles over western Washington. Afternoon highs should trend several degrees above normal, while marine air may provide occasional cooling near Puget Sound. Passing weather disturbances could bring scattered showers, although widespread rainfall is not expected across the metro area. Residents should still be prepared for changing conditions if outdoor plans are scheduled later in the week.
Across eastern Washington, Spokane is expected to experience warmer-than-average afternoons with increasing chances for thunderstorms developing over the mountains before drifting into nearby valleys. Some storms may produce brief heavy rainfall, gusty winds, small hail and frequent cloud-to-ground lightning. Outdoor recreation, travel and agricultural operations could experience temporary interruptions where storms develop.
The warmer and wetter pattern is expected to extend across much of the state, including Tacoma, Everett, Olympia, Bellingham, Yakima, Wenatchee, the Tri-Cities and Walla Walla. The Cascade Mountains may see the greatest coverage of afternoon showers and thunderstorms, while central and eastern Washington could experience locally heavier rainfall beneath stronger storms.
Although the Climate Prediction Center outlook does not pinpoint the exact timing or location of individual weather systems, confidence continues to increase that Washington will remain in a warmer-than-normal and wetter-than-normal pattern through July 27. Residents should monitor updated National Weather Service forecasts, especially those planning travel or outdoor recreation in the Cascades or across eastern Washington, where thunderstorms may develop rapidly during the afternoon and evening.
