Weather Alerts for California

Recent Locations: Silver Creek, GA Fort Pierre, SD Hayward, CA

1. Extreme Heat Warning for: Apple and Lucerne Valleys

2. Extreme Heat Warning for: Coachella Valley; San Diego County Deserts; San Gorgonio Pass Near Banning

3. Extreme Heat Warning for: Cuyama Valley; Santa Clarita Valley; Santa Lucia Mountains; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Ynez Valley; Santa Barbara County Interior Mountains; Western Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Southeastern Ventura County Valleys; Santa Susana Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley; Los Angeles County San Gabriel Valley

4. Extreme Heat Warning for: Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Los Angeles County Inland Coast including Downtown Los Angeles; Eastern Santa Monica Mountains Recreational Area

5. Extreme Heat Warning for: Western Siskiyou County; Central Siskiyou County

6. Heat Advisory for: Lake Casitas; Ojai Valley; Central Ventura County Valleys

7. Heat Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties

8. Heat Advisory for: North Bay Interior Mountains; East Bay Interior Valleys; Santa Clara Valley Including San Jose; Eastern Santa Clara Hills; East Bay Hills; Southern Salinas Valley/Arroyo Seco and Lake San Antonio; Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park

9. Heat Advisory for: North Central and Southeast Siskiyou County; Northeast Siskiyou and Northwest Modoc Counties; Modoc County; South Central Oregon Cascades; Siskiyou Mountains and Southern Oregon Cascades; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County

10. Heat Advisory for: Northern Humboldt Interior; Southern Humboldt Interior; Northwestern Mendocino Interior; Southeastern Mendocino Interior

11. Heat Advisory for: Northern Trinity; Southern Trinity; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County

12. Heat Advisory for: San Bernardino and Riverside County Valleys-The Inland Empire

13. Heat Advisory for: San Bernardino County Mountains; Riverside County Mountains; San Diego County Mountains

14. Heat Advisory for: San Diego County Inland Valleys

15. Heat Advisory for: San Luis Obispo County Inland Central Coast; Santa Barbara County Inland Central Coast; Palos Verdes Hills

16. Heat Advisory for: Santa Ana Mountains and Foothills; Orange County Inland

17. Heat Advisory for: Santa Cruz Mountains

18. Heat Advisory for: Shasta Lake Area / Northern Shasta County; Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta; Northern San Joaquin Valley; Mountains Southwestern Shasta County to Western Colusa County

19. Heat Advisory for: South Central Siskiyou County

20. Red Flag Warning for: Cuyama Valley; San Luis Obispo County Mountains; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains

21. Red Flag Warning for: Santa Clarita Valley; Santa Susana Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills

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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