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Above-average temperatures continue, thunderstorms possible this week

While the warmest day of the heatwave is believed to have passed, temperatures are expected to remain higher than average for a while longer.
Credit: AP Photo/Ted S. Warren, File
FILE - The sun shines near the Space Needle in Seattle.

SEATTLE — Temperatures are cooling down slightly moving into the rest of the week, but they will still remain elevated compared to the average high temperatures for this time of year.

Sea-Tac set a daily temperature record for the fourth day in a row, reaching 86 degrees on Monday.

A Heat Advisory expired Monday at 8 p.m. 

According to the National Weather Service (NWS), overnight temperatures are expected to begin cooling off due to a "deepening marine influence" for the rest of this week. This should prevent "significant heat-related impacts" in most areas.

Temperatures are expected to warm into the upper 80s again on Thursday but cool off on Friday, according to the NWS. Highs will be in the mid-70s for coastal regions.

Thunderstorm potential

A round of isolated thunderstorms are possible across portions of the region this week, according to the NWS. 

The areas with the best chances of seeing thunderstorms include from the Snohomish Cascades south through Lewis County, and along and east of Interstate 5. 

Thunderstorms are possible on Tuesday through Thursday during the afternoon and evening hours, mainly near the mountains. Chances for thunderstorms exist mainly over the Cascades on Tuesday in the afternoon and evening. 

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