Forecast Details for Sun Valley, CA

Recent Locations: Valencia, CA   Coldspring, TX   Sun Valley, CA  
This Afternoon: Sunny, with a high near 70. South wind around 10 mph.
Tonight: Patchy drizzle after 11pm. Increasing clouds, with a low around 54. South southeast wind 5 to 10 mph.
Monday: Patchy drizzle before 11am. Cloudy through mid morning, then gradual clearing, with a high near 69. South southwest wind 5 to 10 mph.
Monday Night: Increasing clouds, with a low around 52. South southwest wind 5 to 10 mph becoming east after midnight.
Tuesday: Mostly sunny, with a high near 75. East wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night: Mostly cloudy, with a low around 53.
Wednesday: Mostly sunny, with a high near 75.
Wednesday Night: Mostly cloudy, with a low around 54.
Thursday: Partly sunny, with a high near 71.
Thursday Night: Mostly cloudy, with a low around 53.
Friday: Partly sunny, with a high near 71.
Friday Night: Mostly cloudy, with a low around 52.
Saturday: Partly sunny, with a high near 71.

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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

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

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 Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds