Weather Alerts for California
1. Air Quality Alert for: Coachella Valley; San Gorgonio Pass Near Banning
2. Freeze Warning for: Western Siskiyou County; Central Siskiyou County
3. Freeze Watch for: Northern Trinity
4. Freeze Watch for: Southern Trinity
5. Frost Advisory for: Northeastern Mendocino Interior
6. Frost Advisory for: Northwestern Mendocino Interior
7. Frost Advisory for: Southeastern Mendocino Interior
8. Frost Advisory for: Southern Lake County
9. High Wind Warning for: Death Valley National Park; Esmeralda and Central Nye County; Western Clark and Southern Nye County
10. High Wind Warning for: Mojave Desert Slopes
11. Wind Advisory for: Catalina and Santa Barbara Islands; San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Ventura County Beaches; Ventura County Inland Coast; Malibu Coast; Los Angeles County Beaches
12. Wind Advisory for: Imperial County Southwest
13. Wind Advisory for: Indian Wells Valley; Mojave Desert
14. Wind Advisory for: Joshua Tree NP West
15. Wind Advisory for: Riverside County Mountains; San Diego County Mountains; Coachella Valley; San Diego County Deserts
16. Wind Advisory for: Salton Sea; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley
17. Wind Advisory for: San Bernardino County Mountains; Apple and Lucerne Valleys
18. Wind Advisory for: San Gorgonio Pass Near Banning
19. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor
20. Wind Advisory for: Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley
21. Winter Storm Warning for: Greater Lake Tahoe Area; Mono; Greater Lake Tahoe Area
22. Winter Storm Warning for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
23. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP
24. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties
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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
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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 Cumulonimbus Clouds?
Home - Education - Cloud Types - 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
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation