Weather Alert in California

Recent Locations: Vallejo, CA  

Winter Storm Warning issued March 13 at 1:39AM PDT until March 13 at 11:00PM PDT by NWS Sacramento CA

AREAS AFFECTED: Western Plumas County/Lassen Park

DESCRIPTION: * WHAT...For the Winter Storm Warning Above 4000 feet, heavy snow. Additional snow accumulations of 8 to 12 inches, up to 18 inches over peaks. For the Winter Storm Watch Above 2000 feet, heavy snow possible. Total snow accumulations between 6 to 12 inches possible. Winds could gust as high as 50 mph. * WHERE...Western Plumas County/Lassen Park. * WHEN...For the Winter Storm Warning, until 11 PM PDT this evening. For the Winter Storm Watch, from 11 PM PDT tonight through Friday evening. * IMPACTS...Travel could be very difficult to impossible at times. The hazardous conditions will impact commutes through Friday evening. Strong winds could cause tree damage. * ADDITIONAL DETAILS...For the Warning, heaviest snowfall expected through this evening. For the Watch, heaviest snowfall expected Friday morning through Friday evening.

INSTRUCTION: Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1. Persons should delay travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Consider taking a winter storm kit along with you and anything else that would help you survive in case you become stranded.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Condensation Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds