Weather Alerts for California
1. Avalanche Warning for: Eastern Sierra Slopes of Inyo County
2. Avalanche Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
3. Avalanche Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
4. Avalanche Warning for: Mono
5. Beach Hazards Statement for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast
6. Coastal Flood Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
7. Coastal Flood Advisory for: Ventura County Beaches
8. Cold Weather Advisory for: North Bay Interior Mountains; North Bay Interior Valleys; Southern Salinas Valley/Arroyo Seco and Lake San Antonio
9. Cold Weather Advisory for: Santa Cruz Mountains; Santa Clara Valley Including San Jose
10. Cold Weather Advisory for: Southeastern Mendocino Interior; Southern Lake County
11. Extreme Cold Warning for: Eastern Santa Clara Hills
12. Extreme Cold Warning for: Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park
13. Flood Advisory for: Los Angeles, CA; Ventura, CA
14. Flood Advisory for: San Luis Obispo, CA; Santa Barbara, CA
15. High Surf Advisory for: Malibu Coast; Los Angeles County Beaches
16. High Surf Advisory for: San Diego County Coastal Areas; Orange County Coastal
17. 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
18. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
19. High Surf Advisory for: Ventura County Beaches
20. High Wind Warning for: Antelope Valley
21. Special Weather Statement for: Santa Clarita Valley; Ventura County Beaches; Central Ventura County Valleys; Malibu Coast; Los Angeles County Beaches; 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; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley
22. Wind Advisory for: Apple and Lucerne Valleys
23. Wind Advisory for: Coachella Valley
24. Wind Advisory for: Cuyama Valley; San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Lucia Mountains; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Santa Barbara County Southwestern Coast
25. Wind Advisory for: Death Valley National Park
26. Wind Advisory for: Imperial County Southwest
27. Wind Advisory for: Joshua Tree NP West; Joshua Tree NP East; Salton Sea; Chuckwalla Mountains; Imperial County West; Chiriaco Summit; Palo Verde Valley; Chuckwalla Valley
28. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley
29. 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
30. Wind Advisory for: San Diego County Deserts
31. Wind Advisory for: San Gorgonio Pass Near Banning
32. Wind Advisory for: Santa Clarita Valley; Santa Barbara County Southeastern Coast; 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; Los Angeles County San Gabriel Valley
33. Wind Advisory for: Santa Ynez Mountains Western Range
34. Wind Advisory for: West Side Mountains north of 198; West Side Mountains South of 198; Buena Vista; Indian Wells Valley; Mojave Desert Slopes; Mojave Desert
35. Wind Advisory for: Western Mojave Desert; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin
36. Winter Storm Warning for: Eastern Sierra Slopes of Inyo County
37. Winter Storm Warning for: Grapevine
38. Winter Storm Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
39. Winter Storm Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties
40. 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
41. Winter Storm Warning for: Mono
42. Winter Storm Warning for: Northern Ventura County Mountains; Eastern San Gabriel Mountains
43. Winter Storm Warning for: Piute Walker Basin; Tehachapi; Frazier Mountain Communities
44. Winter Storm Warning for: Riverside County Mountains
45. Winter Storm Warning for: San Bernardino County Mountains
46. Winter Storm Warning for: Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Interstate 5 Corridor
47. 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
48. Winter Storm Warning for: South Central Siskiyou County; North Central and Southeast Siskiyou County
49. Winter Storm Warning for: Western San Gabriel Mountains and Highway 14 Corridor; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills
50. Winter Storm Warning for: Western Siskiyou County
51. Winter Storm Warning for: White Mountains of Inyo County
52. Winter Weather Advisory for: Central Siskiyou County
53. Winter Weather Advisory for: Eastern Mojave Desert, Including the Mojave National Preserve
54. Winter Weather Advisory for: Eastern Santa Clara Hills
55. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
56. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties
57. Winter Weather Advisory for: Mono
58. Winter Weather Advisory for: Northeast Siskiyou and Northwest Modoc Counties; Modoc County; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County
59. Winter Weather Advisory for: Owens Valley
60. Winter Weather Advisory for: San Diego County Mountains
61. 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
62. Winter Weather Advisory for: Surprise Valley California
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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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