Weather Alerts for California

Recent Locations: Arcadia, CA  

1. Beach Hazards Statement 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

2. Flood Advisory for: Alameda, CA; Contra Costa, CA; San Francisco, CA; Santa Clara, CA

3. Flood Advisory for: Lake, CA

4. Flood Advisory for: Marin, CA; Sonoma, CA

5. Flood Advisory for: Mendocino, CA

6. Flood Advisory for: San Francisco, CA; San Mateo, CA; Santa Clara, CA

7. Flood Advisory for: San Mateo, CA; Santa Cruz, CA

8. Flood Advisory for: Santa Clara, CA; Santa Cruz, CA

9. Flood Watch for: Mariposa Madera Foothills; Mariposa-Madera Lower Sierra; Fresno-Tulare Foothills; Fresno-Tulare Lower Sierra; Yosemite Valley; San Joaquin River Canyon

10. Flood Watch for: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Southwestern Mendocino Interior; Southeastern Mendocino Interior; Northern Lake County; Southern Lake County

11. Flood Watch for: South End Sierra Foothills; South End of the Lower Sierra; Kern River Valley; Piute Walker Basin; Tehachapi; Grapevine; Frazier Mountain Communities; Indian Wells Valley; Mojave Desert Slopes; Mojave Desert

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

13. High Surf Advisory for: Ventura County Beaches

14. High Wind Warning for: Central Siskiyou County

15. High Wind Warning for: Marin Coastal Range; Coastal North Bay Including Point Reyes National Seashore

16. High Wind Warning for: San Francisco; San Francisco Peninsula Coast

17. Wind Advisory for: Coastal Del Norte

18. Wind Advisory for: Del Norte Interior

19. Wind Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

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

21. Wind Advisory for: Mendocino Coast

22. Wind 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

23. Wind Advisory for: Northern Humboldt Coast

24. Wind Advisory for: Northern Lake County; Southern Lake County

25. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta; Northern San Joaquin Valley; Northeast Foothills/Sacramento Valley

26. Wind Advisory for: Northern Trinity; Southern Trinity

27. Wind Advisory for: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Southwestern Mendocino Interior; Southeastern Mendocino Interior

28. Wind Advisory for: Owens Valley; Esmeralda and Central Nye County

29. Wind Advisory for: San Francisco Bay Shoreline; East Bay Interior Valleys; Santa Cruz Mountains; Santa Clara Valley Including San Jose; 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; Northern Salinas Valley/Hollister Valley and Carmel Valley; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

30. Wind Advisory for: 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

31. Wind Advisory for: Sonoma Coastal Range; North Bay Interior Mountains; North Bay Interior Valleys

32. Wind Advisory for: Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior

33. Wind Advisory for: West Side Mountains north of 198; Los Banos - Dos Palos; Coalinga - Avenal; West Side of Fresno and Kings Counties; West Side Mountains South of 198; Buena Vista

34. Winter Storm Warning for: Mono

35. 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

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

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

38. Winter Weather Advisory for: West Slope Northern Sierra Nevada

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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

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Today's National Weather Map

National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

Hole Punch Clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds

Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

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