Weather Alerts for California

Recent Locations: Los Angeles, CA

1. Air Quality Alert for: Coachella Valley

2. Avalanche Watch for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

3. High Wind Warning for: Eastern Sierra Slopes of Inyo County; Owens Valley

4. High Wind Warning for: Mojave Desert Slopes

5. Wind Advisory for: Coachella Valley; San Gorgonio Pass Near Banning

6. Wind Advisory for: Death Valley National Park

7. Wind Advisory for: Eastern Mojave Desert, Including the Mojave National Preserve

8. Wind Advisory for: Imperial County Southwest

9. Wind Advisory for: Imperial County West; Imperial Valley

10. Wind Advisory for: Imperial County West; Imperial Valley

11. Wind Advisory for: Indian Wells Valley

12. Wind Advisory for: Joshua Tree NP West

13. Wind Advisory for: Mojave Desert

14. Wind Advisory for: Mojave Desert Slopes

15. Wind Advisory for: Morongo Basin

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

17. Wind Advisory for: San Diego County Deserts

18. Wind Advisory for: Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley

19. Wind Advisory for: Western Mojave Desert

20. Wind Advisory for: White Mountains of Inyo County; Esmeralda and Central Nye County; Lincoln County; Sheep Range

21. Winter Storm Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

22. Winter Storm Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties

23. Winter Storm Warning for: Northern Trinity; Southern Trinity

24. Winter Storm Warning for: Shasta Lake Area / Northern Shasta County; Mountains Southwestern Shasta County to Western Colusa County

25. Winter Storm Warning for: South Central Siskiyou County

26. Winter Storm Warning for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

27. Winter Storm Warning for: Western Siskiyou County; North Central and Southeast Siskiyou County

28. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge

29. Winter Weather Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

30. Winter Weather Advisory for: Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra

31. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties

32. Winter Weather Advisory for: Modoc County; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County

33. Winter Weather Advisory for: Mono

34. Winter Weather Advisory for: Northern Humboldt Interior

35. Winter Weather Advisory for: South Central Siskiyou County

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