Weather Alerts for California

Recent Locations: Hopewell, NJ Center Junction, IA Grand Terrace, CA

Current Alerts for Grand Terrace, CA: Wind Advisory Winter Storm Warning

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. Cold Weather Advisory for: Marin Coastal Range; Sonoma Coastal Range; Coastal North Bay Including Point Reyes National Seashore; San Francisco Bay Shoreline; Santa Cruz Mountains; Santa Clara Valley Including San Jose; Northern Salinas Valley/Hollister Valley and Carmel Valley; Northern Monterey Bay

5. Cold Weather Advisory for: Southwestern Humboldt; Mendocino Coast; Southwestern Mendocino Interior; Southeastern Mendocino Interior; Southern Lake County

6. Extreme Cold Warning for: North Bay Interior Mountains; North Bay Interior Valleys; East Bay Interior Valleys; Eastern Santa Clara Hills; East Bay Hills; 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

7. Flood Advisory for: Alameda, CA

8. Flood Advisory for: Marin, CA

9. 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

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

11. 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

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; Antelope Valley

15. Wind Advisory for: Apple and Lucerne Valleys

16. Wind Advisory for: Carquinez Strait and Delta; Northern San Joaquin Valley

17. 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

18. Wind Advisory for: Coachella Valley

19. Wind Advisory for: Imperial County Southwest

20. Wind Advisory for: Indian Wells Valley; Mojave Desert

21. Wind Advisory for: Joshua Tree NP West; Chuckwalla Mountains; Chiriaco Summit

22. Wind Advisory for: Mojave Desert Slopes

23. Wind Advisory for: Morongo Basin

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

25. 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

26. Wind Advisory for: San Diego County Deserts

27. Wind Advisory for: San Gorgonio Pass Near Banning

28. Wind Advisory for: Western Mojave Desert

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

30. Winter Storm Warning for: Grapevine

31. 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

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

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

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

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

36. Winter Storm Warning for: Riverside County Mountains

37. Winter Storm Warning for: San Bernardino County Mountains

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

39. 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

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

41. Winter Storm Warning for: Southwestern Humboldt

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

43. Winter Storm Warning for: Western Siskiyou County

44. Winter Weather Advisory for: Central Siskiyou County

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

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

47. Winter Weather Advisory for: Eastern Sierra Slopes of Inyo County

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

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

50. Winter Weather Advisory for: Modoc County; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County

51. Winter Weather Advisory for: Mono

52. Winter Weather Advisory for: Northeast Siskiyou and Northwest Modoc Counties; Klamath Basin

53. Winter Weather Advisory for: San Diego County Mountains

54. 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

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

Current U.S. National Radar--Current

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National Weather Forecast--Current

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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