Weather Alerts for California
1. Avalanche Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
2. Flood Advisory for: Amador, CA; Calaveras, CA; El Dorado, CA; Tuolumne, CA
3. Flood Advisory for: Amador, CA; El Dorado, CA; Placer, CA; Sacramento, CA; Solano, CA; Sutter, CA; Yolo, CA
4. Flood Advisory for: Butte, CA
5. Flood Advisory for: Butte, CA; Colusa, CA; Glenn, CA; Placer, CA; Shasta, CA; Sutter, CA; Tehama, CA; Yolo, CA; Yuba, CA
6. Flood Advisory for: Butte, CA; Nevada, CA; Placer, CA; Plumas, CA; Sierra, CA; Tehama, CA; Yuba, CA
7. Flood Advisory for: El Dorado, CA; Nevada, CA; Placer, CA
8. Flood Advisory for: Lassen, CA
9. Flood Warning for: Butte, CA; Glenn, CA
10. Flood Warning for: Butte, CA; Glenn, CA
11. Flood Warning for: Lassen, CA
12. Flood Warning for: Lassen, CA
13. Flood Warning for: Mendocino, CA
14. Flood Warning for: Mendocino, CA
15. Flood Warning for: Modoc, CA
16. Flood Warning for: Sonoma, CA
17. Flood Warning for: Sonoma, CA
18. Flood Warning for: Tehama, CA
19. Flood Warning for: Tehama, CA
20. Flood Warning for: Tehama, CA
21. Flood Warning for: Tehama, CA
22. Flood Watch for: Mariposa Madera Foothills; Mariposa-Madera Lower Sierra
23. Flood Watch for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta; Northern San Joaquin Valley; Northeast Foothills/Sacramento Valley; Motherlode; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
24. Flood Watch for: Shasta Lake Area / Northern Shasta County; Mountains Southwestern Shasta County to Western Colusa County
25. Frost Advisory for: North Bay Interior Valleys
26. High Wind Warning for: San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Interior Mountains; Northern Ventura County Mountains
27. High Wind Warning for: Santa Lucia Mountains
28. Wind Advisory for: Cuyama Valley; Southern Ventura County Mountains
29. Wind Advisory for: Interstate 5 Corridor
30. Wind Advisory for: San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Southern Salinas Valley; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast
31. Wind Advisory for: Santa Ynez Valley; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area
32. Wind Advisory for: Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills
33. Winter Storm Warning for: Del Norte Interior
34. Winter Storm Warning for: Eastern Sierra Slopes of Inyo County
35. Winter Storm Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
36. Winter Storm Warning for: Mono
37. Winter Storm Warning for: West Slope Northern Sierra Nevada
38. Winter Storm Warning for: Western Plumas County/Lassen Park
39. Winter Storm Warning for: Western Siskiyou County
40. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Sequoia NP; South End of the Upper Sierra
41. Winter Storm Watch for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
42. Winter Storm Watch for: Lassen-Eastern Plumas-Eastern Sierra Counties
43. Winter Storm Watch for: Mono
44. Winter Weather Advisory for: Coastal Del Norte
45. Winter Weather Advisory for: Northern Humboldt Interior; Southern Humboldt Interior
46. Winter Weather Advisory for: Northern Trinity; Southern Trinity
47. Winter Weather Advisory for: Southwestern Humboldt
Want more detail? Get the Complete 7 Day and Night Detailed Forecast!
Current U.S. National Radar--Current
The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).
National Weather Forecast--Current
The Current National Weather Forecast and National Weather Map are shown below.
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
