The early-summer “heat wave” began on Saturday and lasts through Monday for the interior of western Washington. High temperatures for Seattle will be in the low 90′s on Monday. This is not record-breaking heat (far from records which for Monday are in the 100s from last year’s historic heat wave) but it will cause some increasing heat stress come late in the weekend for folks without adequate cooling. It will be a little breezy nearer the Cascades this weekend. A Heat Advisory will be in effect through Monday night for all of Western Washington. There is an increased risk for heat related illnesses.
Monday’s heat will be limited to the interior, however, as the coast ought to be cooling with a developing onshore push. By Tuesday, highs will be back in the 60s and 70s and further cooling is expected later next week. We could see possibly a shower or two around Wednesday.
With this weekend’s heat wave, rivers and lakes will remain cold and rivers will be running high and swift from snowmelt in the mountains. Folks on or near the water should use caution as cold water shock is likely for anyone who falls into water by accident.
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