Seattle Braces for Rainy Midweek as Storm System Moves In

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A storm system is set to bring heavy rain and unsettled weather to the Seattle area, with rain chances increasing to 100% by Tuesday. Steady, widespread rainfall is expected to soak roadways and slow travel across King County, with the potential for pooling water on major highways during the heaviest downpours. Cooler temperatures in the 50s will reinforce the damp pattern through Wednesday, before conditions begin to improve by Thursday.

Why it matters

Seattle is no stranger to rainy weather, but this multi-day storm system could create hazardous travel conditions and disrupt daily routines for residents and commuters across the region. The heavy rainfall also raises concerns about potential flooding, especially on major roadways.

The details

According to the National Weather Service, rain chances will increase to 50% tonight and Monday, before surging to 100% by Tuesday. Winds will shift to the south at 10 to 18 mph, with gusts up to 26 mph during the heaviest rain. Rainfall totals between a quarter and half inch are expected during peak periods. The rain is expected to be steady and widespread on Tuesday, potentially leading to pooling water on I-5, I-90, and Highway 99, especially during peak travel hours. By Wednesday, showers will continue with a slight chance of thunderstorms developing later in the day.

• Rain chances increase to 50% tonight and Monday.
• Rain chances surge to 100% by Tuesday.
• Steady, widespread rain expected on Tuesday.
• Showers continue on Wednesday with a slight chance of thunderstorms.
• Conditions begin to improve by Thursday with partial sunshine returning.

What’s next

Residents should monitor local weather forecasts and be prepared for potential travel disruptions and flooding during the heaviest rainfall periods.