Weather Alerts for California

Recent Locations: Sanborn, IA Freedom, PA Hume, CA

Current Alerts for Hume, CA: Winter Storm Warning

1. Air Quality Alert for: Imperial County Southwest; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial 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. High Surf Advisory for: Malibu Coast; Los Angeles County Beaches

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

6. 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

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

8. High Surf Advisory for: Ventura County Beaches

9. Wind Advisory for: Apple and Lucerne Valleys

10. Wind Advisory for: Coachella Valley

11. Wind Advisory for: Imperial County Southwest

12. Wind Advisory for: Joshua Tree NP West; Salton Sea; Imperial County West

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

14. 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

15. Wind Advisory for: San Diego County Deserts

16. Wind Advisory for: San Gorgonio Pass Near Banning

17. 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

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

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

20. Winter Storm Warning for: Grapevine

21. 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

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

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

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

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

26. Winter Storm Warning for: Riverside County Mountains

27. Winter Storm Warning for: San Bernardino County Mountains

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

29. 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

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

31. Winter Storm Warning for: Southwestern Humboldt

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

33. Winter Storm Warning for: Western Siskiyou County

34. Winter Weather Advisory for: Central Siskiyou County

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

36. Winter Weather Advisory for: Eastern Santa Clara Hills

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

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

39. Winter Weather Advisory for: Mono

40. 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

41. Winter Weather Advisory for: San Diego County Mountains

42. 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

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 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

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