Weather Alerts for California

Recent Locations: Manchester, NH   Yoder, IN   Simi Valley, CA  
Current Alerts for Simi Valley, CA: Wind Advisory

1. Air Quality Alert for: Coachella Valley

2. Air Quality Alert for: Imperial County Southwest; Imperial County West; Imperial Valley

3. Freeze Warning for: Western Siskiyou County

4. Frost Advisory for: Del Norte Interior; Northern Humboldt Coast; Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior; Mendocino Coast; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Southwestern Mendocino Interior; Southeastern Mendocino Interior; Northern Lake County; Southern Lake County

5. High Wind Warning for: Mojave Desert Slopes

6. High Wind Warning for: Santa Susana Mountains

7. High Wind Warning for: Western Santa Monica Mountains Recreational Area; Western San Gabriel Mountains and Highway 14 Corridor

8. Lake Wind Advisory for: Kern River Valley

9. Wind Advisory for: Eastern San Gabriel Mountains

10. Wind Advisory for: Indian Wells Valley; Mojave Desert

11. Wind Advisory for: Riverside County Mountains; San Diego County Mountains; Apple and Lucerne Valleys; Coachella Valley; San Diego County Deserts

12. Wind Advisory for: San Bernardino and Riverside County Valleys-The Inland Empire; Santa Ana Mountains and Foothills; Orange County Inland

13. Wind Advisory for: San Bernardino County Mountains; San Gorgonio Pass Near Banning

14. Wind Advisory for: San Bernardino County Mountains; San Gorgonio Pass Near Banning

15. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range

16. Wind Advisory for: Santa Clarita Valley; Ventura County Beaches; Ventura County Inland Coast; Central Ventura County Valleys; Calabasas and Agoura Hills; Western San Fernando Valley; Southeastern Ventura County Valleys

17. Wind Advisory for: Santa Susana Mountains

18. Wind Advisory for: Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains

19. Wind Advisory for: Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor

20. Wind Advisory for: Western Antelope Valley Foothills; Antelope Valley

21. Wind Advisory for: Western Mojave Desert

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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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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

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