Weather Alerts for California

Recent Locations: Spring Valley, 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: Lake, CA

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

4. Flood Advisory for: Mendocino, CA

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

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

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

8. 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

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

10. High Surf Advisory for: Ventura County Beaches

11. High Wind Warning for: Central Siskiyou County

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

13. High Wind Warning for: Mendocino Coast

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

15. Wind Advisory for: Coastal Del Norte

16. Wind Advisory for: Del Norte Interior

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

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

19. 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

20. Wind Advisory for: Northern Humboldt Coast

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

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

23. Wind Advisory for: Northern Trinity; Southern Trinity

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

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

26. 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

27. 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

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

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

30. 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

31. Winter Storm Warning for: Mono

32. 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

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

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

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

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Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail

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