Weather Alerts for California

Recent Locations: Penn Valley, CA  

1. Air Quality Alert for: Eastern San Fernando Valley; Eastern San Gabriel Mountains; Eastern Santa Monica Mountains Recreational Area; Los Angeles County Beaches; Los Angeles County Inland Coast including Downtown Los Angeles; Los Angeles County San Gabriel Valley; Malibu Coast; Palos Verdes Hills; Santa Clarita Valley; Santa Susana Mountains; Western San Fernando Valley; Western San Gabriel Mountains and Highway 14 Corridor; Western Santa Monica Mountains Recreational Area

2. Air Quality Alert for: Joshua Tree NP West; Joshua Tree NP East; Chuckwalla Mountains; Chiriaco Summit; Chuckwalla Valley

3. Beach Hazards Statement for: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast

4. Freeze Warning for: Cuyama Valley; Southern Salinas Valley; Ojai Valley

5. Freeze Warning for: Merced - Madera - Mendota; West Side of Fresno and Kings Counties; Caruthers - San Joaquin - Selma; Buttonwillow - Lost Hills - I5; Delano-Wasco-Shafter; Hanford - Corcoran - Lemoore; Buena Vista; South End San Joaquin Valley

6. Freeze Warning for: San Luis Obispo County Interior Valleys; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley

7. Freeze Warning for: Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley

8. Frost Advisory for: Southern Salinas Valley/Arroyo Seco and Lake San Antonio; Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park

9. Red Flag Warning for: Northern Ventura County Mountains

10. Red Flag Warning for: San Bernardino and Riverside County Valleys - The Inland Empire; San Bernardino County Mountains-Including The Mountain Top And Front Country Ranger Districts Of The San Bernardino National Forest

11. Red Flag Warning for: San Diego County Inland Valleys; Riverside County Mountains-Including The San Jacinto Ranger District Of The San Bernardino National Forest; San Diego County Mountains-Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest

12. Red Flag Warning for: San Gorgonio Pass Near Banning

13. Red Flag Warning for: San Luis Obispo County Mountains; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Lake Casitas; Ojai Valley

14. Red Flag Warning for: Santa Ana Mountains-Including The Trabuco Ranger District of the Cleveland National Forest; Orange County Inland

15. Red Flag Warning for: Santa Clarita Valley; Malibu Coast; Eastern Santa Monica Mountains Recreational Area; Eastern San Fernando Valley; Eastern San Gabriel Mountains

16. Red Flag Warning for: Santa Susana Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor

17. Red Flag Warning for: Ventura County Beaches; Ventura County Inland Coast; Central Ventura County Valleys; Western Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Western San Fernando Valley; Southeastern Ventura County Valleys; Southern Ventura County Mountains

18. Wind Advisory for: Eastern Santa Monica Mountains Recreational Area; Eastern San Fernando Valley; Northern Ventura County Mountains

19. Wind Advisory for: Mojave Desert Slopes

20. Wind Advisory for: San Bernardino and Riverside County Valleys-The Inland Empire; San Bernardino County Mountains; Santa Ana Mountains and Foothills; San Gorgonio Pass Near Banning; Orange County Inland

21. Wind Advisory for: San Diego County Inland Valleys; Riverside County Mountains; San Diego County Mountains

22. Wind Advisory for: Santa Clarita Valley; Malibu Coast; Calabasas and Agoura Hills; Eastern San Gabriel Mountains

23. Wind Advisory for: Ventura County Beaches; Ventura County Inland Coast; Central Ventura County Valleys; Western Santa Monica Mountains Recreational Area; Western San Fernando Valley; Southeastern Ventura County Valleys; Santa Susana Mountains; Southern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor

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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

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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 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

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