Forecast Details for Seattle, WA

Recent Locations: Lavelle, PA Kokomo, IN Seattle, WA

Tonight: Increasing clouds, with a low around 57. North wind around 5 mph becoming calm in the evening.

Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 74. Calm wind becoming west southwest around 5 mph in the afternoon.

Sunday Night: Mostly cloudy, with a low around 57. Calm wind becoming west around 5 mph in the evening.

Monday: Partly sunny, with a high near 74. South wind around 6 mph.

Monday Night: Mostly cloudy, with a low around 58. South southwest wind around 5 mph.

Tuesday: Partly sunny, with a high near 77.

Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 60.

Wednesday: A chance of rain. Mostly cloudy, with a high near 73.

Wednesday Night: A chance of rain. Mostly cloudy, with a low around 60.

Thursday: A chance of rain. Mostly cloudy, with a high near 74.

Thursday Night: A slight chance of rain. Mostly cloudy, with a low around 58.

Friday: Mostly sunny, with a high near 77.

Friday Night: Mostly clear, with a low around 59.

Saturday: Sunny, with a high near 81.

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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).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

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

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.

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds