Forecast Details for Seattle-Tacoma International Airport, WA

Recent Locations: Seattle-Tacoma International Airport, WA  
This Afternoon: Showers and possibly a thunderstorm. Some of the storms could produce small hail. High near 54. Southwest wind 14 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight: Showers and possibly a thunderstorm. Some of the storms could produce small hail. Low around 41. South southwest wind 10 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday: Showers likely, then showers and possibly a thunderstorm after 8am. Some of the storms could produce small hail. High near 53. South southwest wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night: Showers and possibly a thunderstorm before 11pm, then showers likely. Some of the storms could produce small hail. Low around 41. South wind 8 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday: A 50 percent chance of showers. Partly sunny, with a high near 55. South wind around 7 mph becoming west in the afternoon.
Tuesday Night: Partly cloudy, with a low around 41.
Wednesday: Mostly sunny, with a high near 61.
Wednesday Night: A slight chance of showers after 11pm. Mostly cloudy, with a low around 45.
Thursday: A chance of showers, mainly after 11am. Partly sunny, with a high near 59.
Thursday Night: Partly cloudy, with a low around 45.
Friday: Mostly sunny, with a high near 65.
Friday Night: A slight chance of showers. Mostly cloudy, with a low around 48.
Saturday: A chance of showers. Mostly cloudy, with a high near 65.

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Precipitation Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain