Weather Alerts for California

Recent Locations: Walls, MS Dunedin, FL Granite Bay, CA

1. Avalanche Watch for: Eastern Sierra Slopes of Inyo County

2. Avalanche Watch for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

3. Avalanche Watch for: Mono

4. Beach Hazards Statement for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast

5. Coastal Flood Advisory for: Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

6. Coastal Flood Advisory for: San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline

7. Flood Advisory for: Alameda, CA; Contra Costa, CA

8. Flood Advisory for: San Francisco, CA; San Mateo, CA

9. Flood Advisory for: San Luis Obispo, CA

10. Flood Watch for: Catalina and Santa Barbara Islands; Santa Clarita Valley; Santa Ynez Valley; 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; 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; Los Angeles County San Gabriel Valley; San Miguel and Santa Rosa Islands; Santa Cruz and Anacapa Islands

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

12. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches; Malibu Coast; Los Angeles County Beaches

13. High Surf Advisory for: Ventura County Beaches

14. High Wind Warning for: Cuyama Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills

15. High Wind Warning for: San Miguel and Santa Rosa Islands; Santa Cruz and Anacapa Islands

16. Wind Advisory for: Apple and Lucerne Valleys

17. Wind Advisory for: Apple and Lucerne Valleys

18. Wind Advisory for: Buttonwillow - Lost Hills - I5; Delano-Wasco-Shafter; Bakersfield; Southeast San Joaquin Valley; South End San Joaquin Valley

19. 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; 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; Antelope Valley; Los Angeles County San Gabriel Valley

20. Wind Advisory for: Imperial County Southwest

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

22. Wind Advisory for: Owens Valley; Death Valley National Park

23. 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

24. 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

25. Wind Advisory for: San Diego County Deserts

26. Wind Advisory for: San Diego County Deserts

27. Wind Advisory for: San Diego County Mountains

28. Wind Advisory for: San Diego County Mountains

29. Wind Advisory for: San Gorgonio Pass Near Banning

30. Wind Advisory for: San Gorgonio Pass Near Banning

31. Wind Advisory for: Southern Salinas Valley/Arroyo Seco and Lake San Antonio; Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park; Northern Salinas Valley/Hollister Valley and Carmel Valley; Southern Monterey Bay and Big Sur Coast

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. Winter Storm Warning for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior

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

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

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

37. 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

38. Winter Storm Warning for: Mono

39. Winter Storm Warning for: Northern Trinity; Southern Trinity

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: San Bernardino County Mountains; Riverside County Mountains

43. Winter Storm Warning for: Shasta Lake Area / Northern Shasta County; Burney Basin / Eastern Shasta County; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley; Motherlode; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

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

45. Winter Storm Warning for: Southwestern Humboldt

46. Winter Storm Warning for: Western Siskiyou County

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

48. Winter Storm Watch for: Grapevine

49. Winter Storm Watch for: Owens Valley

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

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

52. Winter Weather Advisory for: Central Siskiyou County

53. Winter Weather Advisory for: Coastal Del Norte; Northern Humboldt Coast

54. 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

55. Winter Weather Advisory for: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County

56. 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

57. Winter Weather Advisory for: Surprise Valley California

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

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 Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds