Weather Alerts for California
1. Air Quality Alert for: Coachella Valley; San Gorgonio Pass Near Banning
2. Air Quality Alert for: Imperial Valley
3. Beach Hazards Statement for: Catalina and Santa Barbara Islands; Malibu Coast; Los Angeles County Beaches
4. Beach Hazards Statement for: San Diego County Coastal Areas; Orange County Coastal
5. Beach Hazards Statement for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
6. Excessive Heat Warning for: Coachella Valley; San Diego County Deserts
7. Excessive Heat Warning for: Imperial County Southwest; Salton Sea; Imperial County West; Imperial Valley; Chuckwalla Valley
8. Excessive Heat Warning for: San Gorgonio Pass Near Banning
9. Freeze Watch 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
10. Heat Advisory for: San Bernardino and Riverside County Valleys-The Inland Empire
11. Heat Advisory for: Santa Barbara County Southeastern Coast; Santa Ynez Mountains Eastern Range
12. Heat Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
13. High Surf Advisory for: Ventura County Beaches
14. High Wind Warning for: Mojave Desert Slopes
15. High Wind Warning for: Northern Ventura County Mountains; Interstate 5 Corridor; Western Antelope Valley Foothills
16. High Wind Warning for: Santa Barbara County Interior Mountains
17. High Wind Warning for: Santa Barbara County Southeastern Coast; Santa Ynez Mountains Eastern Range
18. High Wind Warning for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
19. High Wind Warning for: Southern Ventura County Mountains
20. High Wind Watch for: Mojave Desert Slopes
21. Lake Wind Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
22. Lake Wind Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties
23. Red Flag Warning for: Lake County Portion of Lake-Napa-Sonoma Unit
24. Red Flag Warning for: Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft; Central Sacramento Valley including Glenn/Colusa/Yuba/Northern Sutter/Butte County Below 1000 Ft; Southern Sacramento Valley In Yolo/Sacramento/Far Western Placer/Southern Sutter and Solano County Below 1000 Ft - Excludes the Delta; Southeast Edge Shasta/Trinity NF and Western Portions of Tehama/Glenn RU; Northern Sierra Foothills from 1000 to 3000 Ft. Includes Nevada-Yuba-Placer RU and Anador-Eldorado RU; Eastern Mendocino NF
25. Wind Advisory for: Santa Barbara County Interior Mountains
26. Wind Advisory for: Santa Barbara County Southeastern Coast; Santa Ynez Mountains Eastern Range
27. Wind Advisory for: Santa Clarita Valley
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Current U.S. National Radar--Current
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National Weather Forecast--Current
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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 Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
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
