Weather Alerts for California

Recent Locations: Lihue, HI Granite Bay, CA

1. High Surf Advisory for: Catalina and Santa Barbara Islands; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches

2. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches

3. High Surf Advisory for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast

4. High Wind Warning for: Grapevine

5. High Wind Warning for: San Bernardino County Mountains; Apple and Lucerne Valleys

6. Wind Advisory for: Owens Valley; Esmeralda and Central Nye County

7. Wind Advisory for: West Side Mountains north of 198; West Side Mountains South of 198; Buena Vista; Tehachapi; Frazier Mountain Communities; Mojave Desert Slopes

8. Wind Advisory for: Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Eastern Antelope Valley Foothills

9. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge

10. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

11. Winter Weather Advisory for: Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra

12. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties

13. Winter Weather Advisory for: Mono

14. Winter Weather Advisory for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

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Current U.S. National Radar--Current

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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 are Altocumulus Clouds?

Home - Education - Cloud Types - Altocumulus Clouds

Next Topic: Altostratus Clouds

Similar to cirrocumulus clouds, altocumulus clouds are characterized by cloud patches. They are distinguished by larger cloudlets than cirrocumulus clouds but are still smaller than stratocumulus clouds.

Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km) and may resemble, at times, the shape of a flying saucer. These uncommon formations, called altocumulus lenticularis, are created by uplift in the atmosphere and are most often seen in close proximity to mountains.

Next Topic: Altostratus Clouds

Weather Topic: What are Cirrocumulus Clouds?

Home - Education - Cloud Types - Cirrocumulus Clouds

Next Topic: Cirrostratus Clouds

Cirrocumulus clouds form at high altitudes (usually around 5 km) and have distinguishing characteristics displayed in a fine layer of small cloud patches. These small cloud patches are sometimes referred to as "cloudlets" in relation to the whole cloud formation.

Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the water droplets in the cloud freeze into ice crystals and the cloud becomes a cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud formations generally pass rapidly.

Next Topic: Cirrostratus Clouds