Weather Alerts for California
1. Air Quality Alert for: Coachella Valley
2. Air Quality Alert for: Imperial County Southwest; Imperial County West; Imperial Valley
3. Air Quality Alert for: Los Angeles County San Gabriel Valley
4. Freeze Watch for: Western Siskiyou County
5. High Wind Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties
6. High Wind Warning for: Mojave Desert Slopes
7. High Wind Warning for: Mono
8. High Wind Watch for: Santa Susana Mountains
9. High Wind Watch for: Western Santa Monica Mountains Recreational Area; Western San Gabriel Mountains and Highway 14 Corridor
10. Wind Advisory for: Central Siskiyou County
11. Wind Advisory for: Coastal Del Norte; Del Norte Interior
12. Wind Advisory for: Indian Wells Valley; Mojave Desert
13. Wind Advisory for: Modoc County
14. Wind Advisory for: San Bernardino County Mountains; Riverside County Mountains; San Diego County Mountains; Apple and Lucerne Valleys; Coachella Valley; San Diego County Deserts; San Gorgonio Pass Near Banning
15. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
16. Wind Advisory for: Santa Susana Mountains
17. Wind Advisory for: Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains
18. Wind Advisory for: Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor
19. Wind Advisory for: Surprise Valley California; Northern Washoe County
20. Wind Advisory for: Western Antelope Valley Foothills; Antelope Valley
21. Wind Advisory for: Western Mojave Desert
22. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
23. Winter Weather Advisory for: Modoc County
24. Winter Weather Advisory for: Northern Trinity
25. Winter Weather Advisory for: West Slope Northern Sierra Nevada
26. Winter Weather Advisory for: Western Siskiyou County
27. Winter Weather Advisory for: Yosemite NP outside of the valley; Upper San Joaquin River
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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
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - 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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