Weather Alerts for California
1. Air Quality Alert for: Coachella Valley
2. Avalanche Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
3. Beach Hazards Statement for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast
4. Freeze Watch for: Los Banos - Dos Palos; Merced - Madera - Mendota; Planada - Le Grand - Snelling; Coalinga - Avenal; West Side of Fresno and Kings Counties; Caruthers - San Joaquin - Selma; Fresno-Clovis; Buttonwillow - Lost Hills - I5; Delano-Wasco-Shafter; Hanford - Corcoran - Lemoore; Visalia - Porterville - Reedley; Bakersfield; Southeast San Joaquin Valley; South End San Joaquin Valley
5. High Surf Advisory for: Malibu Coast; Los Angeles County Beaches
6. High Surf Advisory for: San Diego County Coastal Areas; Orange County Coastal
7. High Surf Advisory for: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
8. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
9. High Surf Advisory for: Ventura County Beaches
10. High Wind Warning for: Cuyama Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Interior Mountains; Antelope Valley
11. Wind Advisory for: Apple and Lucerne Valleys
12. Wind Advisory for: Catalina and Santa Barbara Islands; Santa Clarita Valley; San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Lucia Mountains; Southern Salinas Valley; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Ventura County Beaches; Ventura County Inland Coast; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Malibu Coast; Los Angeles County Beaches; Palos Verdes Hills; Los Angeles County Inland Coast including Downtown Los Angeles; Western Santa Monica Mountains Recreational Area; Eastern 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; Los Angeles County San Gabriel Valley
13. Wind Advisory for: Coachella Valley
14. Wind Advisory for: Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin
15. Wind Advisory for: Indian Wells Valley; Mojave Desert
16. Wind Advisory for: Mojave Desert Slopes
17. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley
18. Wind Advisory for: San Diego County Coastal Areas; San Bernardino and Riverside County Valleys-The Inland Empire; San Diego County Inland Valleys; Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
19. Wind Advisory for: San Diego County Deserts
20. Wind Advisory for: San Gorgonio Pass Near Banning
21. Wind Advisory for: Western Mojave Desert
22. Wind Advisory for: Western Mojave Desert
23. Winter Storm Warning for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior
24. Winter Storm Warning for: Grapevine
25. Winter Storm Warning for: Mariposa-Madera Lower Sierra; Fresno-Tulare Lower Sierra; South End of the Lower Sierra; Yosemite NP outside of the valley; Yosemite Valley; San Joaquin River Canyon; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra
26. Winter Storm Warning for: Northern Trinity; Southern Trinity
27. Winter Storm Warning for: Northern Ventura County Mountains; Eastern San Gabriel Mountains
28. Winter Storm Warning for: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County
29. Winter Storm Warning for: Piute Walker Basin; Tehachapi; Frazier Mountain Communities
30. Winter Storm Warning for: Riverside County Mountains
31. Winter Storm Warning for: San Bernardino County Mountains
32. Winter Storm Warning for: Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Interstate 5 Corridor
33. Winter Storm Warning for: Shasta Lake Area / Northern Shasta County; Burney Basin / Eastern Shasta County; Northern Sacramento Valley; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley; Motherlode; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
34. Winter Storm Warning for: South Central Siskiyou County; North Central and Southeast Siskiyou County
35. Winter Storm Warning for: Southwestern Humboldt
36. Winter Storm Warning for: Western San Gabriel Mountains and Highway 14 Corridor; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills
37. Winter Storm Warning for: Western Siskiyou County
38. Winter Weather Advisory for: Central Siskiyou County
39. Winter Weather Advisory for: Coastal Del Norte; Northern Humboldt Coast
40. Winter Weather Advisory for: Eastern Mojave Desert, Including the Mojave National Preserve
41. Winter Weather Advisory for: Eastern Sierra Slopes of Inyo County
42. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
43. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties
44. Winter Weather Advisory for: Modoc County; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County
45. Winter Weather Advisory for: Mono
46. Winter Weather Advisory for: Northeast Siskiyou and Northwest Modoc Counties; Klamath Basin
47. Winter Weather Advisory for: San Diego County Mountains
48. Winter Weather Advisory for: Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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