Thunderstorm clusters with wind, heavy rain and hail are moving south to north across Western Washington. Lightning strikes are common and dangerous. Please be alert to weather changes and warnings. A flash flood warning is in effect for the Cascade Range and foothills through Sunday morning.

The wave of severe storms will move quickly across Tacoma to Seattle and Everett, dissipating early in the morning while gusty winds will blow across Port Angeles to Mount Vernon and Bellingham.

Once the first wave of showers and thunderstorms passes on Sunday morning, the weather looks set to settle down. Sunday afternoon will see a less severe but still worrying round of showers and isolated thunderstorms. Skies will be partly to mostly cloudy, with highs of around 24 degrees.

The large, swirling low pressure system aloft that is offshore will send the heaviest waves of rain and thunderstorms to Canada through Sunday morning, but the low will stay offshore and make way for a new low pressure system that will move out of Canada again on Tuesday. The weather Seattle can expect is calmer and mostly sunny on Monday, but cloudier with scattered showers on Tuesday. An isolated thunderstorm could develop on Tuesday, but it will not be severe.

The new low, which will sink south toward California on Thursday, will remain offshore. Thursday and Friday will see warmer temperatures in western Washington, with temperatures between 25 and 27 degrees and mostly sunny to clear skies. Saturday of next weekend will also be pleasant and mostly sunny! However, the low will bounce like a basketball and return to us on its way, where it will rain on Sunday.

Meteorologist Rebecca Stevenson
The KOMO 4 forecast team

Updated Saturday night