Weather Alerts for California

Recent Locations: Hot Springs National Park, AR Laconia, NH Irvine, CA

Current Alerts for Irvine, CA: High Surf Advisory Wind Advisory

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. Severe Thunderstorm Warning for: Santa Barbara, CA

22. Special Weather Statement for: Cuyama Valley; San Luis Obispo County Inland Central Coast; 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; Santa Ynez Mountains Western Range; Santa Barbara County Interior Mountains

23. Wind Advisory for: Antelope Valley

24. Wind Advisory for: Apple and Lucerne Valleys

25. Wind Advisory for: Coachella Valley

26. 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

27. Wind Advisory for: Death Valley National Park

28. Wind Advisory for: Imperial County Southwest

29. 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

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

31. 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

32. Wind Advisory for: San Diego County Deserts

33. Wind Advisory for: San Gorgonio Pass Near Banning

34. 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

35. Wind Advisory for: Santa Ynez Mountains Western Range

36. 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

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

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

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

40. Winter Storm Warning for: Grapevine

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

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

43. 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

44. Winter Storm Warning for: Mono

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

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

47. Winter Storm Warning for: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County

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

49. Winter Storm Warning for: Riverside County Mountains

50. Winter Storm Warning for: San Bernardino County Mountains

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

52. 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

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

54. Winter Storm Warning for: Southwestern Humboldt

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

56. Winter Storm Warning for: Western Siskiyou County

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

58. Winter Weather Advisory for: Central Siskiyou County

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

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

61. Winter Weather Advisory for: Eastern Santa Clara Hills

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

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

64. Winter Weather Advisory for: Mono

65. 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

66. Winter Weather Advisory for: Owens Valley

67. Winter Weather Advisory for: San Diego County Mountains

68. 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

69. 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 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

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle