Weather Alerts for California

Recent Locations: Commack, NY Springdale, UT Kaweah, CA

Current Alerts for Kaweah, CA: Winter Storm Warning

1. Avalanche Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

2. Coastal Flood Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches

3. Coastal Flood Advisory for: Ventura County Beaches

4. High Surf Advisory for: Malibu Coast; Los Angeles County Beaches

5. High Surf Advisory for: San Diego County Coastal Areas; Orange County Coastal

6. High Surf Advisory for: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

7. High Surf Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches

8. High Surf Advisory for: Ventura County Beaches

9. Wind Advisory for: Apple and Lucerne Valleys

10. Wind Advisory for: Coachella Valley

11. Wind Advisory for: Imperial County Southwest

12. Wind Advisory for: Joshua Tree NP West; Joshua Tree NP East; Salton Sea; Chuckwalla Mountains; Imperial County West; Chiriaco Summit; Palo Verde Valley; Chuckwalla Valley

13. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley

14. Wind Advisory for: San Diego County Deserts

15. Wind Advisory for: San Gorgonio Pass Near Banning

16. Wind Advisory for: West Side Mountains north of 198; West Side Mountains South of 198; Buena Vista; Indian Wells Valley; Mojave Desert Slopes; Mojave Desert

17. Wind Advisory for: Western Mojave Desert; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin

18. Winter Storm Warning for: Grapevine

19. Winter Storm Warning for: Mariposa-Madera Lower Sierra; Fresno-Tulare Lower Sierra; South End of the Lower Sierra; Yosemite NP outside of the valley; Yosemite Valley; San Joaquin River Canyon; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra

20. Winter Storm Warning for: Northern Ventura County Mountains; Eastern San Gabriel Mountains

21. Winter Storm Warning for: Piute Walker Basin; Tehachapi; Frazier Mountain Communities

22. Winter Storm Warning for: Riverside County Mountains

23. Winter Storm Warning for: San Bernardino County Mountains

24. Winter Storm Warning for: Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Interstate 5 Corridor

25. Winter Storm Warning for: Shasta Lake Area / Northern Shasta County; Burney Basin / Eastern Shasta County; Northern Sacramento Valley; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley; Motherlode; Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

26. Winter Storm Warning for: South Central Siskiyou County; North Central and Southeast Siskiyou County

27. Winter Storm Warning for: Western San Gabriel Mountains and Highway 14 Corridor; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills

28. Winter Storm Warning for: Western Siskiyou County

29. Winter Weather Advisory for: Central Siskiyou County

30. Winter Weather Advisory for: Eastern Santa Clara Hills

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

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

33. Winter Weather Advisory for: Mono

34. Winter Weather Advisory for: Northeast Siskiyou and Northwest Modoc Counties; Modoc County; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County

35. Winter Weather Advisory for: San Diego County Mountains

36. Winter Weather Advisory for: Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park

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 Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle