Current Outlook

5/18/2018 Pleasant on Saturday; Heat Wave Possible Next Week

“The forecaster woes of split flows and cut off lows continue today, as an abnormal atmospheric circulation pattern looks to persist in the coming days. Although the most recent model runs are in better agreement, the poor consistency and continuity of late still diminishes the overall forecast confidence level...”

Recent Outlooks

5/11/2018 Heat Returns This Weekend; Slight Relief Possible Later Next Week

“An early season heat wave is expected for much of the region during the Sunday through early next week timeframe. Widespread 80s and even a few 90s are anticipated for highs, while low temperatures look to continue to climb as well. Otherwise, largely dry weather and only modest breezes are predicted to occur. Initially on Saturday, a building high pressure ridge from the west and north will usher in the beginnings of a warm spell, even as northerly winds persist in some areas. Please do not..”

5/4/2018 Warm and Slightly Unsettled This Weekend; From Hot to Cooler Next Week

“Warm conditions are likely this weekend, although some clouds are anticipated due to a fairly moist atmosphere. In fact, a mild disturbance and increasing instability could bring a few showers or thunderstorms to the state on Sunday and Sunday night. ..”

4/27/2018 Cooler and Unsettled Into Early Next Week; Warmer and Drier Thereafter

“A notable weather pattern shift is imminent, as an upper level area of low pressure begins to move inland over Oregon tonight. The very warm and summer-like conditions of late will be replaced with cooler and unsettled weather for this weekend and early next week. Although the upcoming regime is not abnormal for this time of the year, the change may seem abrupt after the recent warm spell. The drop in high temperatures in eastern Washington from Friday to Saturday should be on the order of 25..”

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Washington State University