Weather Alerts for California
1. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
2. High Surf Advisory for: Ventura County Beaches
3. Wind Advisory for: Death Valley National Park; Western Mojave Desert; Eastern Mojave Desert, Including the Mojave National Preserve; Western Clark and Southern Nye County; Spring Mountains-Red Rock Canyon; Las Vegas Valley; Southern Clark County
4. Wind Advisory for: Eastern Sierra Slopes of Inyo County; Owens Valley
5. Wind Advisory for: Indian Wells Valley; Mojave Desert Slopes; Mojave Desert
6. Wind Advisory for: San Francisco Peninsula Coast; Santa Cruz Mountains; East Bay Hills; Northern Monterey Bay
7. Wind Advisory for: Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park; Southern Monterey Bay and Big Sur Coast
8. Winter Storm Warning for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
9. Winter Weather Advisory for: Del Norte Interior; Northern Humboldt Interior; Northern Trinity; Southern Trinity
10. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
11. Winter Weather Advisory for: Mono
12. Winter Weather Advisory for: South Central Siskiyou County; North Central and Southeast Siskiyou County
13. Winter Weather Advisory for: Western Siskiyou County
14. Winter Weather Advisory for: Yosemite NP outside of the valley; Upper San Joaquin River
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Current U.S. National Radar--Current
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National Weather Forecast for Tomorrow
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North America Water Vapor (Moisture)
This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.
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