Weather Alerts for California
1. Air Quality Alert for: Coachella Valley; San Gorgonio Pass Near Banning
2. Beach Hazards Statement for: Catalina and Santa Barbara Islands; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
3. Freeze Warning for: Western Siskiyou County; Central Siskiyou County
4. Frost Advisory for: Northeastern Mendocino Interior
5. Frost Advisory for: Northern Trinity
6. Frost Advisory for: Northwestern Mendocino Interior
7. Frost Advisory for: Southeastern Mendocino Interior
8. Frost Advisory for: Southern Lake County
9. Frost Advisory for: Southern Trinity
10. Wind Advisory for: Catalina and Santa Barbara Islands; San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Ventura County Beaches; Ventura County Inland Coast; Malibu Coast; Los Angeles County Beaches
11. Wind Advisory for: Imperial County Southwest
12. Wind Advisory for: Indian Wells Valley; Mojave Desert
13. Wind Advisory for: Mojave Desert Slopes
14. Wind Advisory for: Riverside County Mountains; San Diego County Mountains; Coachella Valley; San Diego County Deserts
15. Wind Advisory for: Salton Sea; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley
16. Wind Advisory for: San Bernardino County Mountains; Apple and Lucerne Valleys
17. Wind Advisory for: San Gorgonio Pass Near Banning
18. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor
19. Wind Advisory for: Western Antelope Valley Foothills; Antelope Valley
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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
