Weather Alerts for California
1. Beach Hazards Statement for: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
2. Red Flag Warning for: Lower Middle Klamath; Trinity
3. Red Flag Warning for: Western Klamath National Forest; Central Siskiyou County Including Shasta Valley; Siskiyou County from the Cascade Mountains East and South to Mt Shasta; Modoc County Except for the Surprise Valley
4. Red Flag Warning for: Western Klamath National Forest; Central Siskiyou County Including Shasta Valley; Siskiyou County from the Cascade Mountains East and South to Mt Shasta; Modoc County Except for the Surprise Valley
5. Special Weather Statement for: Catalina and Santa Barbara Islands; San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
6. Special Weather Statement for: Catalina and Santa Barbara Islands; San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
7. Special Weather Statement for: Catalina and Santa Barbara Islands; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
8. Special Weather Statement for: Catalina and Santa Barbara Islands; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
9. Special Weather Statement for: Catalina and Santa Barbara Islands; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
10. Special Weather Statement for: Coastal Del Norte
11. Special Weather Statement for: Coastal Del Norte
12. Special Weather Statement for: Coastal Del Norte
13. Special Weather Statement for: Coastal Del Norte
14. Special Weather Statement for: Coastal Del Norte
15. Special Weather Statement for: Coastal Del Norte
16. Special Weather Statement for: Lassen-Eastern Plumas-Eastern Sierra Counties
17. Special Weather Statement for: Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast
18. Special Weather Statement for: Northern Trinity; Southern Trinity
19. Special Weather Statement for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast
20. Special Weather Statement for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast
21. Special Weather Statement for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast
22. Special Weather Statement for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast
23. Special Weather Statement for: Southern Trinity; Northeastern Mendocino Interior
24. Special Weather Statement for: Western Siskiyou County
25. Tsunami Advisory for: Coastal Del Norte
26. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
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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
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