Weather Alerts for California
1. Flood Advisory for: Lassen, CA
2. Flood Warning for: Butte, CA; Glenn, CA
3. Flood Warning for: Butte, CA; Glenn, CA
4. Flood Warning for: Lassen, CA
5. Flood Warning for: Lassen, CA
6. Flood Warning for: Modoc, CA
7. Flood Warning for: Sonoma, CA
8. Flood Warning for: Sonoma, CA
9. Flood Warning for: Tehama, CA
10. Flood Warning for: Tehama, CA
11. Flood Warning for: Tehama, CA
12. Frost Advisory for: North Bay Interior Valleys
13. Winter Storm Warning for: Del Norte Interior
14. Winter Storm Warning for: Eastern Sierra Slopes of Inyo County
15. Winter Storm Warning for: Western Siskiyou County
16. 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
17. Winter Storm Watch for: Lassen-Eastern Plumas-Eastern Sierra Counties; Greater Lake Tahoe Area; Greater Lake Tahoe Area
18. Winter Storm Watch for: Mono
19. Winter Weather Advisory for: Coastal Del Norte
20. Winter Weather Advisory for: Northern Humboldt Interior; Southern Humboldt Interior
21. Winter Weather Advisory for: Northern Trinity; Southern Trinity
22. Winter Weather Advisory for: South Central Siskiyou County
23. Winter Weather Advisory for: Southwestern Humboldt
24. Winter Weather Advisory for: Western Siskiyou County
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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 Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
