Weather Alerts for California
1. Beach Hazards Statement for: Northern Monterey Bay
2. Fire Weather Watch for: Catalina and Santa Barbara Islands; Los Angeles County Beaches; Palos Verdes Hills; Los Angeles County Inland Coast including Downtown Los Angeles
3. Fire Weather Watch for: Santa Clarita Valley; Ventura County Beaches; Ventura County Inland Coast; Central Ventura County Valleys; Malibu Coast; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Southeastern Ventura County Valleys; Santa Susana Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley
4. High Surf Advisory for: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Southern Monterey Bay and Big Sur Coast
5. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
6. High Surf Advisory for: Ventura County Beaches
7. High Wind Watch for: Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor
8. High Wind Watch for: Los Angeles County Beaches; Palos Verdes Hills; Los Angeles County Inland Coast including Downtown Los Angeles
9. High Wind Watch for: Malibu Coast; Eastern Santa Monica Mountains Recreational Area; Western San Fernando Valley; Eastern San Fernando Valley; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley
10. High Wind Watch for: San Bernardino and Riverside County Valleys-The Inland Empire; San Bernardino County Mountains
11. High Wind Watch for: San Diego County Inland Valleys; Riverside County Mountains; San Diego County Mountains
12. High Wind Watch for: San Gorgonio Pass Near Banning
13. High Wind Watch for: Santa Ana Mountains and Foothills; Orange County Inland
14. High Wind Watch for: Santa Clarita Valley; Calabasas and Agoura Hills
15. High Wind Watch for: Santa Susana Mountains; Southern Ventura County Mountains
16. High Wind Watch for: Southeastern Ventura County Valleys
17. High Wind Watch for: Ventura County Beaches; Ventura County Inland Coast; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Northern Ventura County Mountains
18. High Wind Watch for: Western Santa Monica Mountains Recreational Area
19. Wind Advisory for: Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor
20. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range
21. Wind Advisory for: Santa Clarita Valley; Calabasas and Agoura Hills
22. Wind Advisory for: Santa Lucia Mountains; San Luis Obispo County Mountains; Santa Barbara County Interior Mountains; Western Antelope Valley Foothills
23. Wind Advisory for: Santa Susana Mountains; Southern Ventura County Mountains
24. Wind Advisory for: Southeastern Ventura County Valleys
25. Wind Advisory for: Western Santa Monica Mountains Recreational Area
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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
Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.
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 are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
