First storm of season brings heavy rain, windy conditions

  • Rain overnight, some urban flooding
  • Breezes calming down overnight
  • Showers, sunbreaks and isolated PM thunderstorms this weekend

Friday started off with light rain and temps in the 50s. The intensity of the rain grew late Friday but was heavier at the coast as the heaviest band of rainfall moved through and headed into the Cascades.

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Moderate rainfall is expected to continue overnight into Saturday morning.

Rainfall amounts have already totaled about an half-inch of rain around Seattle with more than 2.5″ at the coast at Forks. Going into tomorrow, another half-inch of rain can be expected. Some urban flooding continues to be possible through around daybreak but thereafter rain will become much more sporadic (although it could be heavy at times in downpours or thunderstorms.)

>>PinPoint 7-Day forecast

Showers and sunbreaks will be the rule as well as blustery cool winds this weekend, giving the weather a decidedly autumnal feel.

As an upper-level trough of low pressure moves through, cold air aloft will increase instability, bringing a chance of some passing downpours of heavy rain and small hail as well as the potential for lightning. The chances will be greatest for this at the warmest times of day – mid/late afternoon and early evening.

Saturday will likely be the wetter of the two weekend days and have a better chance of thunderstorms, though there will be some passing showers along with the sunbreaks on Sunday and a slight chance of late-day storms.

We’ll dry out early next week, with some rain again by next Wednesday.