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