Weather Alerts for California

Recent Locations: Topton, NC Bessemer, AL Sylmar, CA

1. Air Quality Alert for: Imperial County Southwest; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley

2. Freeze Warning for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior; Northern Trinity; Southern Trinity; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County

3. Freeze Warning for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior; Northern Trinity; Southern Trinity; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County

4. Freeze Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties

5. Freeze Warning for: Southeastern Mendocino Interior

6. Freeze Warning for: Surprise Valley California; Northern Washoe County

7. Freeze Warning for: Western Siskiyou County; Eastern Curry County and Josephine County; Jackson County

8. Frost Advisory for: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast

9. Frost Advisory for: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast

10. Frost Advisory for: Southwestern Mendocino Interior

11. Frost Advisory for: Southwestern Mendocino Interior

12. Frost Advisory for: Western Siskiyou County; Eastern Curry County and Josephine County; Jackson County

13. Wind Advisory for: Apple and Lucerne Valleys

14. Wind Advisory for: Indian Wells Valley; Mojave Desert

15. Wind Advisory for: Interstate 5 Corridor; Western Antelope Valley Foothills

16. Wind Advisory for: Mojave Desert Slopes

17. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta

18. Wind Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches

19. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range

20. Wind Advisory for: Santa Lucia Mountains

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 Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails