Forecast Details for Seattle-Tacoma International Airport, WA

Recent Locations: Hulett, WY   Prospect Heights, IL   Seattle-Tacoma International Airport, WA  
Overnight: Mostly clear, with a low around 45. South southwest wind 3 to 6 mph.
Monday: Mostly sunny, with a high near 65. West southwest wind around 6 mph.
Monday Night: A 20 percent chance of rain after 4am. Increasing clouds, with a low around 49. West southwest wind 6 to 9 mph becoming south in the evening.
Tuesday: Rain. High near 55. South wind 9 to 13 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night: Showers likely, mainly before 11pm. Mostly cloudy, with a low around 47. South southwest wind around 13 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday: A 40 percent chance of showers, mainly before 11am. Mostly cloudy, with a high near 60.
Wednesday Night: Partly cloudy, with a low around 48.
Thursday: Partly sunny, with a high near 66.
Thursday Night: A slight chance of showers after 11pm. Mostly cloudy, with a low around 50.
Friday: A chance of showers. Mostly cloudy, with a high near 62.
Friday Night: A chance of showers. Mostly cloudy, with a low around 47.
Saturday: A slight chance of showers. Partly sunny, with a high near 61.
Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 48.
Sunday: A slight chance of showers. Partly sunny, with a high near 64.

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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

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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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds