Weather Alerts for California

Recent Locations: Rockville, MD   Granite Bay, CA   Springdale, UT  

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

14. Flood Advisory for: Los Angeles, CA; Ventura, CA

15. Flood Advisory for: San Luis Obispo, CA; Santa Barbara, CA

16. Flood Watch for: Santa Clarita Valley; 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; Northern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley; Los Angeles County San Gabriel Valley

17. High Surf Advisory for: Malibu Coast; Los Angeles County Beaches

18. High Surf Advisory for: San Diego County Coastal Areas; Orange County Coastal

19. 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

20. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches

21. High Surf Advisory for: Ventura County Beaches

22. High Wind Warning for: Antelope Valley

23. Wind Advisory for: Apple and Lucerne Valleys

24. Wind Advisory for: Coachella Valley

25. Wind Advisory for: Imperial County Southwest

26. 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

27. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley

28. 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

29. Wind Advisory for: San Diego County Deserts

30. Wind Advisory for: San Gorgonio Pass Near Banning

31. 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

32. 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

33. Wind Advisory for: Western Mojave Desert; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin

34. Winter Storm Warning for: Eastern Sierra Slopes of Inyo County

35. Winter Storm Warning for: Grapevine

36. Winter Storm Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

37. Winter Storm Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties

38. 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

39. Winter Storm Warning for: Mono

40. Winter Storm Warning for: Northern Ventura County Mountains; Eastern San Gabriel Mountains

41. Winter Storm Warning for: Piute Walker Basin; Tehachapi; Frazier Mountain Communities

42. Winter Storm Warning for: Riverside County Mountains

43. Winter Storm Warning for: San Bernardino County Mountains

44. Winter Storm Warning for: Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Interstate 5 Corridor

45. 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

46. Winter Storm Warning for: South Central Siskiyou County; North Central and Southeast Siskiyou County

47. Winter Storm Warning for: Western San Gabriel Mountains and Highway 14 Corridor; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills

48. Winter Storm Warning for: Western Siskiyou County

49. Winter Storm Warning for: White Mountains of Inyo County

50. Winter Weather Advisory for: Central Siskiyou County

51. Winter Weather Advisory for: Eastern Mojave Desert, Including the Mojave National Preserve

52. Winter Weather Advisory for: Eastern Santa Clara Hills

53. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

54. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties

55. Winter Weather Advisory for: Mono

56. 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

57. Winter Weather Advisory for: Owens Valley

58. Winter Weather Advisory for: San Diego County Mountains

59. 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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Current U.S. National Radar--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Altostratus Clouds Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds

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