Weather Alerts for California

Recent Locations: Victorville, CA Townsend, VA San Diego, CA

Current Alerts for San Diego, CA: Wind Advisory

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

2. Air Quality Alert for: Imperial County Southwest; Imperial County West; Imperial Valley

3. Flood Advisory for: Amador, CA; Calaveras, CA; El Dorado, CA; Nevada, CA; Placer, CA; Sacramento, CA; San Joaquin, CA; Stanislaus, CA; Sutter, CA; Tuolumne, CA; Yolo, CA

4. High Wind Warning for: Death Valley National Park; Esmeralda and Central Nye County

5. Severe Thunderstorm Warning for: Butte, CA; Glenn, CA; Tehama, CA

6. Severe Thunderstorm Warning for: Fresno, CA; Madera, CA; Merced, CA

7. Severe Thunderstorm Warning for: Glenn, CA

8. Special Weather Statement for: Planada - Le Grand - Snelling; Fresno-Clovis; Mariposa Madera Foothills; Mariposa-Madera Lower Sierra; Fresno-Tulare Foothills

9. Wind Advisory for: Apple and Lucerne Valleys; San Diego County Deserts

10. Wind Advisory for: Eastern Sierra Slopes of Inyo County; White Mountains of Inyo County; Owens Valley South; Owens Valley North; Lincoln County

11. Wind Advisory for: Imperial County Southwest

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

13. Wind Advisory for: Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley

14. Wind Advisory for: Joshua Tree NP West

15. Wind Advisory for: Mojave Desert Slopes

16. Wind Advisory for: Riverside County Mountains; San Diego County Mountains

17. Wind Advisory for: San Bernardino County Mountains

18. Wind Advisory for: San Gorgonio Pass Near Banning

19. Wind Advisory for: Southern Ventura County Mountains; Northern Ventura County Mountains

20. Winter Storm Warning for: Lassen Volcanic National Park; Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Sierra-Nevada-Placer Counties Above 5000 ft Including Interstate 80; Sierra Nevada of El Dorado-Amador-Northern Alpine Counties Above 5000 ft Including Highway 50; Sierra Nevada of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 ft

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

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

23. Winter Weather Advisory for: Mono

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