Weather Alerts for California
1. Avalanche Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
2. Flood Advisory for: Butte, CA; Colusa, CA; Glenn, CA; Placer, CA; Shasta, CA; Sutter, CA; Tehama, CA; Yolo, CA; Yuba, CA
3. Flood Advisory for: Lassen, CA
4. Flood Warning for: Butte, CA; Glenn, CA
5. Flood Warning for: Butte, CA; Glenn, CA
6. Flood Warning for: Lassen, CA
7. Flood Warning for: Lassen, CA
8. Flood Warning for: Mendocino, CA
9. Flood Warning for: Mendocino, CA
10. Flood Warning for: Modoc, CA
11. Flood Warning for: Sonoma, CA
12. Flood Warning for: Sonoma, CA
13. Flood Warning for: Tehama, CA
14. Flood Warning for: Tehama, CA
15. Flood Warning for: Tehama, CA
16. Flood Warning for: Tehama, CA
17. Flood Watch for: Mariposa Madera Foothills; Mariposa-Madera Lower Sierra
18. Frost Advisory for: North Bay Interior Valleys
19. Wind Advisory for: Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills
20. Winter Storm Warning for: Del Norte Interior
21. Winter Storm Warning for: Eastern Sierra Slopes of Inyo County
22. Winter Storm Warning for: Mono
23. Winter Storm Warning for: West Slope Northern Sierra Nevada
24. Winter Storm Warning for: Western Siskiyou County
25. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP; South End of the Upper Sierra
26. Winter Storm Watch for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
27. Winter Storm Watch for: Lassen-Eastern Plumas-Eastern Sierra Counties
28. Winter Storm Watch for: Mono
29. Winter Weather Advisory for: Coastal Del Norte
30. Winter Weather Advisory for: Northern Humboldt Interior; Southern Humboldt Interior
31. Winter Weather Advisory for: Northern Trinity; Southern Trinity
32. Winter Weather Advisory for: South Central Siskiyou County
33. Winter Weather Advisory for: Southwestern Humboldt
34. Winter Weather Advisory for: Western Siskiyou County
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Current U.S. National Radar--Current
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National Weather Forecast--Current
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National Weather Forecast for Tomorrow
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North America Water Vapor (Moisture)
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Weather Topic: What is Graupel?
Home - Education - Precipitation - 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
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - 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
