Weather Alerts for California
1. Beach Hazards Statement for: Ventura County Beaches
2. Freeze Warning for: Western Siskiyou County; Central Siskiyou County; Eastern Curry County and Josephine County; Jackson County
3. Frost Advisory for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior; Northern Trinity; Northwestern Mendocino Interior
4. Frost Advisory for: Northern Lake County
5. Frost Advisory for: Southern Trinity; Northeastern Mendocino Interior
6. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
7. Lake Wind Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
8. Wind Advisory for: North Bay Interior Mountains
9. Wind Advisory for: Northeast Foothills/Sacramento Valley; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
10. Wind Advisory for: Northern Lake County
11. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta; Mountains Southwestern Shasta County to Western Colusa County
12. Wind Advisory for: Southern Lake County
13. Wind Advisory for: Southern Trinity; Northeastern Mendocino Interior
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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
