Weather Alerts for California

Recent Locations: Lodi, CA  

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. Beach Hazards Statement for: San Diego County Coastal Areas; Orange County Coastal

4. High Wind Warning for: Interstate 5 Corridor

5. High Wind Warning for: Mojave Desert Slopes

6. High Wind Warning for: Western Antelope Valley Foothills

7. High Wind Watch for: Antelope Valley

8. High Wind Watch for: Southern Ventura County Mountains; Northern Ventura County Mountains

9. Wind Advisory for: Antelope Valley

10. Wind Advisory for: Eastern San Gabriel Mountains

11. Wind Advisory for: Imperial County Southwest

12. Wind Advisory for: Joshua Tree NP West; Salton Sea; Imperial County Southeast; Imperial County West; Imperial Valley

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

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

15. Wind Advisory for: San Gorgonio Pass Near Banning

16. Wind Advisory for: Santa Barbara County Interior Mountains

17. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range

18. Wind Advisory for: South End of the Upper Sierra; Piute Walker Basin; Tehachapi; Indian Wells Valley; Mojave Desert

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

20. Wind Advisory for: Western Mojave Desert

21. Wind Advisory for: 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

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 are Contrails?

Home - Education - Cloud Types - Contrails

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

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