Forecast Details for Seattle-Tacoma International Airport, WA

Recent Locations: Seattle-Tacoma International Airport, WA  
Tonight: A 30 percent chance of snow, mainly after 2am. Mostly cloudy, with a low around 31. East southeast wind 3 to 7 mph. Total nighttime snow accumulation of less than a half inch possible.
Saturday: Snow likely before 5pm, then a chance of rain and snow. Cloudy, with a high near 39. Calm wind becoming north northwest around 5 mph in the afternoon. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday Night: A chance of rain and snow before 7pm, then a chance of snow between 7pm and 10pm. Cloudy, with a low around 31. Light and variable wind. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday: A 20 percent chance of snow. Partly sunny, with a high near 40. Calm wind becoming northwest around 5 mph in the afternoon.
Sunday Night: Partly cloudy, with a low around 26. Northeast wind around 5 mph.
Monday: Mostly sunny, with a high near 38.
Monday Night: Mostly clear, with a low around 22.
Tuesday: Sunny, with a high near 36.
Tuesday Night: Mostly clear, with a low around 21.
Wednesday: A slight chance of snow after 4pm. Mostly sunny, with a high near 37.
Wednesday Night: A chance of snow. Mostly cloudy, with a low around 25.
Thursday: Rain and snow likely. Mostly cloudy, with a high near 38.
Thursday Night: Rain and snow likely. Mostly cloudy, with a low around 29.
Friday: A chance of rain and snow. Mostly cloudy, with a high near 41.

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Current U.S. National Radar--Current

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Current U.S. National Radar

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North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail