Weather forecasters say the fog that's been with us for a week will stay one more day on Tuesday before giving way to a weather front bringing rain and warmer temperatures.
Since Wednesday last week, the National Weather Service (NWS) has issued Dense Fog advisories daily and maintained an Air Stagnation warning due to a ridge of high pressure that stayed over Western Washington, trapping the cold and damp air over the Seattle area. According to Scott Sistek at KomoNews.com, the 7-day streak ties for the fifth longest all time (although well behind the "epic fog storm" of December 1985 when the city had 13 straight days with dense fog at some point).
The fog is already starting to break up over Mercer Island on Tuesday afternoon, but the weather will really start to shift tomorrow morning as the fog dissipates and a light breeze and rain start rolling into the area around 4 a.m., according to the NWS 7-day forecast.
Here's the latest forecast for Mercer Island for the rest of the week:
- This Afternoon: Patchy fog. Otherwise, cloudy, with a high near 40. Calm wind.
- Tonight: Rain likely after 4am. Patchy fog. Otherwise, cloudy, with a low around 35. Calm wind becoming southeast around 6 mph after midnight. Chance of precipitation is 60%.
- Wednesday: Showers. High near 44. Light and variable wind becoming south southwest 10 to 15 mph in the afternoon. Chance of precipitation is 80%.
- Wednesday Night: Showers likely, mainly before 4am. Cloudy, with a low around 38. South southwest wind 6 to 14 mph. Chance of precipitation is 60%.
- Thursday: A 30 percent chance of rain. Mostly cloudy, with a high near 46. South wind 7 to 10 mph.
- Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 39.
- Friday: A 50 percent chance of rain. Mostly cloudy, with a high near 46.
- Friday Night: A chance of rain. Cloudy, with a low around 40.