Forecast Details for Seattle-Tacoma International Airport, WA

Recent Locations: Seattle-Tacoma International Airport, WA  
Today: Rain likely, mainly after 11am. Mostly cloudy, with a high near 49. Northeast wind around 6 mph becoming south in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight: Rain, mainly after 1am. Steady temperature around 46. North northeast wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday: Rain. High near 54. East wind 15 to 21 mph becoming south in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night: Rain likely, mainly after 4am. Mostly cloudy, with a low around 42. South wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday: Rain. High near 49. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night: Rain. Low around 42. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday: Rain likely. Mostly cloudy, with a high near 49. Chance of precipitation is 70%.
Sunday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 41.
Monday: A chance of rain. Mostly cloudy, with a high near 48.
Monday Night: A chance of rain. Mostly cloudy, with a low around 39.
Tuesday: A chance of rain. Partly sunny, with a high near 47.
Tuesday Night: A chance of rain. Mostly cloudy, with a low around 38.
Wednesday: A chance of rain. Partly sunny, with a high near 47.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

North American Water Vapor Map

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Contrails Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Cumulus Clouds Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle