Weather Alerts for California
1. Air Quality Alert for: Coachella Valley; San Gorgonio Pass Near Banning
2. Air Quality Alert for: Imperial County Southwest; Imperial County West; Imperial Valley
3. Beach Hazards Statement for: San Diego County Coastal Areas; Orange County Coastal
4. Frost Advisory for: Northern Trinity; Southern Trinity; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County
5. High Surf Advisory for: Catalina and Santa Barbara Islands; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
6. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
7. High Wind Warning for: Antelope Valley
8. High Wind Warning for: Interstate 5 Corridor
9. High Wind Warning for: Mojave Desert Slopes
10. High Wind Warning for: San Miguel and Santa Rosa Islands; Santa Cruz and Anacapa Islands
11. High Wind Warning for: Western Antelope Valley Foothills
12. Wind Advisory for: Catalina and Santa Barbara Islands
13. Wind Advisory for: Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin; Cadiz Basin
14. Wind Advisory for: Eastern San Gabriel Mountains
15. Wind Advisory for: Imperial County Southwest
16. Wind Advisory for: Joshua Tree NP West; Salton Sea; Imperial County Southeast; Imperial County West; Imperial Valley
17. Wind Advisory for: Lake Casitas
18. Wind Advisory for: Riverside County Mountains; San Diego County Mountains; Coachella Valley; San Diego County Deserts
19. Wind Advisory for: San Bernardino County Mountains; Apple and Lucerne Valleys
20. Wind Advisory for: San Gorgonio Pass Near Banning
21. Wind Advisory for: Santa Barbara County Interior Mountains
22. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
23. Wind Advisory for: Santa Clarita Valley; Santa Susana Mountains
24. Wind Advisory for: Santa Ynez Mountains Eastern Range
25. Wind Advisory for: South End of the Upper Sierra; Piute Walker Basin; Tehachapi; Indian Wells Valley; Mojave Desert
26. Wind Advisory for: Southern Ventura County Mountains; Northern Ventura County Mountains
27. Wind Advisory for: Western Mojave Desert
28. Wind Advisory for: Western San Gabriel Mountains and Highway 14 Corridor
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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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain