Weather Alerts for California

Recent Locations: Granada Hills, CA

1. Air Quality Alert for: Riverside County Mountains; Coachella Valley; San Gorgonio Pass Near Banning

2. Air Quality Alert for: San Bernardino and Riverside County Valleys-The Inland Empire

3. Red Flag Warning for: Eastern Portion of Shasta/Trinity NF; Burney Basin and Northeast Plateau in Shasta County Including Northwest Lassen NF north of Lassen NP; Southeast Edge Shasta/Trinity NF and Western Portions of Tehama/Glenn RU; Northern Sierra Foothills from 1000 to 3000 Ft. Includes Nevada-Yuba-Placer RU and Anador-Eldorado RU; Northern Sierra Including Lassen NP and Plumas and Lassen NF/S West of the Sierra Crest - West of Evans Peak/Grizzly Peak/Beckworth Peak; Eastern Mendocino NF

4. Red Flag Warning for: Lower Middle Klamath; Hoopa; Van Duzen/Mad River; W Mendocino NF/E Mendocino Unit; Trinity

5. Red Flag Warning for: Lower Middle Klamath; Hoopa; Van Duzen/Mad River; W Mendocino NF/E Mendocino Unit; Trinity

6. Red Flag Warning for: Upper Smith

7. Red Flag Warning for: Western Klamath National Forest; Central Siskiyou County Including Shasta Valley; Siskiyou County from the Cascade Mountains East and South to Mt Shasta

8. Red Flag Warning for: Western Klamath National Forest; Central Siskiyou County Including Shasta Valley; Siskiyou County from the Cascade Mountains East and South to Mt Shasta

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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

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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 is Condensation?

Home - Education - Precipitation - 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