Weather Alerts for California
1. Air Quality Alert for: Imperial County Southwest; Imperial County West; Imperial Valley
2. Air Quality Alert for: Los Angeles County San Gabriel Valley
3. Freeze Watch for: Western Siskiyou County
4. High Wind Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties
5. High Wind Warning for: Mojave Desert Slopes
6. High Wind Warning for: Mono
7. High Wind Watch for: Santa Susana Mountains
8. High Wind Watch for: Western Santa Monica Mountains Recreational Area; Western San Gabriel Mountains and Highway 14 Corridor
9. Wind Advisory for: Central Siskiyou County
10. Wind Advisory for: Coastal Del Norte; Del Norte Interior
11. Wind Advisory for: Indian Wells Valley; Mojave Desert
12. Wind Advisory for: Modoc County
13. Wind Advisory for: San Bernardino County Mountains; Riverside County Mountains; San Diego County Mountains; Apple and Lucerne Valleys; Coachella Valley; San Diego County Deserts; San Gorgonio Pass Near Banning
14. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
15. Wind Advisory for: Santa Susana Mountains
16. Wind Advisory for: Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains
17. Wind Advisory for: Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor
18. Wind Advisory for: Surprise Valley California; Northern Washoe County
19. Wind Advisory for: Western Antelope Valley Foothills; Antelope Valley
20. Wind Advisory for: Western Mojave Desert
21. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
22. Winter Weather Advisory for: Modoc County
23. Winter Weather Advisory for: Northern Trinity
24. Winter Weather Advisory for: West Slope Northern Sierra Nevada
25. Winter Weather Advisory for: Western Siskiyou County
26. Winter Weather Advisory for: Yosemite NP outside of the valley; Upper San Joaquin River
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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 Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
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