Weather Alerts for California

Recent Locations: Hines, IL Gorham, IL Rumsey, CA

1. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley

2. Winter Storm Watch for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior

3. Winter Storm Watch for: Eastern Sierra Slopes of Inyo County

4. Winter Storm Watch for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

5. Winter Storm Watch for: Lassen-Eastern Plumas-Eastern Sierra Counties

6. Winter Storm Watch for: Mariposa-Madera Lower Sierra; Fresno-Tulare Lower Sierra; South End of the Lower Sierra; Yosemite NP outside of the valley; Yosemite Valley; San Joaquin River Canyon; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra; Piute Walker Basin

7. Winter Storm Watch for: Mono

8. Winter Storm Watch for: Northern Trinity; Southern Trinity

9. Winter Storm Watch for: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County

10. Winter Storm Watch for: Shasta Lake Area / Northern Shasta County; Burney Basin / Eastern Shasta County; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley; Motherlode; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

11. Winter Storm Watch for: South Central Siskiyou County; North Central and Southeast Siskiyou County

12. Winter Storm Watch for: South Central Siskiyou County; North Central and Southeast Siskiyou County

13. Winter Storm Watch for: Western Siskiyou County

14. Winter Storm Watch for: Western Siskiyou County

15. Winter Storm Watch for: White Mountains of Inyo 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 is Fog?

Home - Education - Cloud Types - Fog

Fog Next Topic: Fractus Clouds

Fog is technically a type of stratus cloud, which lies along the ground and obscures visibility.

It is usually created when humidity in the air condenses into tiny water droplets. Because of this, some places are more prone to foggy weather, such as regions close to a body of water.

Fog is similar to mist; both are the appearance of water droplets suspended in the air, but fog is the term applied to the condition when visibility is less than 1 km.

Next Topic: Fractus Clouds

Weather Topic: What is Freezing Rain?

Home - Education - Precipitation - Freezing Rain

Next Topic: Graupel

Freezing rain is a condition where precipitation which has fallen in the form of water droplets reaches temperatures which are below freezing and freezes upon coming into contact with surface objects. The result of this precipitation is a glaze of ice which can be damaging to plants and man-made structures. A severe onset of freezing rain which results in a very thick glaze of ice is known as an ice storm.

Next Topic: Graupel