Weather Alerts for California

Recent Locations: Fremont, CA  

1. Air Quality Alert for: Coachella Valley; San Gorgonio Pass Near Banning

2. Freeze Warning for: Western Siskiyou County; Central Siskiyou County

3. Freeze Watch for: Northern Trinity

4. Freeze Watch for: Southern Trinity

5. Frost Advisory for: Northeastern Mendocino Interior

6. Frost Advisory for: Northwestern Mendocino Interior

7. Frost Advisory for: Southeastern Mendocino Interior

8. Frost Advisory for: Southern Lake County

9. High Wind Warning for: Mojave Desert Slopes

10. High Wind Warning for: South End of the Upper Sierra

11. Wind Advisory for: Catalina and Santa Barbara Islands; San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Ventura County Beaches; Ventura County Inland Coast; Malibu Coast; Los Angeles County Beaches

12. Wind Advisory for: Imperial County Southwest

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

14. Wind Advisory for: Riverside County Mountains; San Diego County Mountains; Coachella Valley; San Diego County Deserts

15. Wind Advisory for: Salton Sea; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley

16. Wind Advisory for: San Bernardino County Mountains; Apple and Lucerne Valleys

17. Wind Advisory for: San Gorgonio Pass Near Banning

18. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor

19. Wind Advisory for: Western Antelope Valley Foothills; Antelope Valley

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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).

Current U.S. National Radar

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

Today's National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

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.

North American Water Vapor Map

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Evaporation Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog

Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain