RAIN. The cool air made it over with a burst of thunder and a short shower. Warm air rises; and with cooler air above and warm air near the surface, the warm air rising upwards, in order to moderate the temps, creates more clouds and once those clouds are saturated... rain! So the temperature reading will be lower than 70(F) but it will still feel like 70(F) with muggy conditions and a slim chance of T-showers and brief periods of rain. After the air above and below mixes enough and moderates that's when the rain stops; perhaps in the next few hours.
The showers are mainly around Seattle eastward, with a few heavy T-showers east of Tacoma (the red blob) and south of Olympia.
The first rule of thumb before forecasting is... to look outside! And, with that note looking outside I did. Tilting my head to the north... blue skies, to the south... pockets of clouds moving in from the southwest. Very interesting. So here is the visible satellite image painting just that. Mostly blue and a few thin clouds north of Kent and scattered clouds south of Kent.(As of 10:30am PDT)
