Weather Alerts for California

Recent Locations: San Francisco, CA  
Current Alerts for San Francisco, CA: High Surf Warning 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: Mono

4. Flood Warning for: Butte, CA; Glenn, CA

5. Flood Warning for: Mendocino, CA

6. Flood Warning for: Solano, CA; Yolo, CA

7. Flood Warning for: Sonoma, CA

8. Flood Warning for: Tehama, CA

9. Flood Watch for: Mariposa Madera Foothills; Mariposa-Madera Lower Sierra; Fresno-Tulare Foothills; Fresno-Tulare Lower Sierra; South End Sierra Foothills; South End of the Lower Sierra; Kern River Valley; Piute Walker Basin

10. Flood Watch for: San Joaquin River Canyon

11. Flood Watch for: Shasta Lake Area / Northern Shasta County; Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley; Motherlode; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

12. Flood Watch for: Yosemite Valley

13. Frost Advisory for: North Bay Interior Valleys; Eastern Santa Clara 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

14. High Surf Advisory for: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast

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

16. High Surf Advisory for: Orange County Coastal

17. High Surf Advisory for: San Diego County Coastal Areas

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

19. High Surf Advisory for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast

20. High Surf Advisory for: Ventura County Beaches

21. High Surf Warning 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

22. High Wind Warning for: San Bernardino County Mountains

23. Wind Advisory for: Apple and Lucerne Valleys

24. Wind Advisory for: Imperial County Southwest

25. Wind Advisory for: North Bay Interior Mountains; San Francisco Bay Shoreline; East Bay Interior Valleys; Santa Clara Valley Including San Jose; East Bay Hills; Northern Salinas Valley/Hollister Valley and Carmel Valley

26. Wind Advisory for: North Bay Interior Valleys; Eastern Santa Clara 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

27. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta; Northern San Joaquin Valley

28. Wind Advisory for: Riverside County Mountains; San Diego County Mountains

29. Wind Advisory for: San Diego County Deserts

30. Wind Advisory for: San Francisco; Marin Coastal Range; Sonoma Coastal Range; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Santa Cruz Mountains; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

31. Wind Advisory for: San Gorgonio Pass Near Banning

32. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range

33. Wind Advisory for: Southern Lake County

34. Wind Advisory for: Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor

35. Wind Advisory for: Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley

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

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

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

39. Winter Storm Warning for: Mono

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

41. Winter Storm Warning for: Shasta Lake Area / Northern Shasta County; Burney Basin / Eastern Shasta County; Mountains Southwestern Shasta County to Western Colusa County

42. Winter Storm Warning for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

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

44. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra

45. Winter Weather Advisory for: San Bernardino County Mountains

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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).

Current U.S. National Radar

National Weather Forecast--Current

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

Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

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

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Cirrostratus Clouds Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds