Weather Alerts for California
1. Air Quality Alert for: Coachella Valley
2. Freeze Warning for: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County
3. Frost Advisory for: Southeastern Mendocino Interior; Southern Lake County
4. High Surf Advisory for: San Diego County Coastal Areas
5. High Surf Advisory for: Ventura County Beaches; Malibu Coast; Los Angeles County Beaches
6. High Wind Warning for: Mojave Desert Slopes
7. Special Weather Statement for: Central Sacramento Valley; Northeast Foothills/Sacramento Valley; Motherlode; West Slope Northern Sierra Nevada
8. Special Weather Statement for: Los Banos - Dos Palos; Merced - Madera - Mendota
9. Special Weather Statement for: Merced - Madera - Mendota; Planada - Le Grand - Snelling; Caruthers - San Joaquin - Selma; Fresno-Clovis; Mariposa Madera Foothills; Fresno-Tulare Foothills
10. Special Weather Statement for: Merced - Madera - Mendota; Planada - Le Grand - Snelling; Mariposa Madera Foothills
11. Special Weather Statement for: Merced - Madera - Mendota; West Side of Fresno and Kings Counties; Caruthers - San Joaquin - Selma; Fresno-Clovis
12. Special Weather Statement for: Northeast Foothills/Sacramento Valley; Western Plumas County/Lassen Park
13. Special Weather Statement for: San Francisco Bay Shoreline; San Francisco Peninsula Coast; Santa Cruz Mountains
14. Wind Advisory for: Catalina and Santa Barbara Islands; Santa Clarita Valley; Santa Barbara County Southeastern Coast; Ventura County Beaches; Ventura County Inland Coast; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Malibu Coast; Los Angeles County Beaches; Palos Verdes Hills; Los Angeles County Inland Coast including Downtown Los Angeles; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Southeastern Ventura County Valleys; Santa Susana Mountains; Los Angeles County San Gabriel Valley
15. Wind Advisory for: Coachella Valley; San Gorgonio Pass Near Banning
16. Wind Advisory for: Imperial County Southwest
17. Wind Advisory for: Imperial County West; Imperial Valley
18. Wind Advisory for: Indian Wells Valley; Mojave Desert
19. Wind Advisory for: Morongo Basin
20. Wind Advisory for: San Bernardino County Mountains; Riverside County Mountains; San Diego County Mountains; Apple and Lucerne Valleys
21. Wind Advisory for: San Diego County Coastal Areas; San Bernardino and Riverside County Valleys-The Inland Empire; San Diego County Inland Valleys; Santa Ana Mountains and Foothills; Orange County Coastal; Orange County Inland
22. Wind Advisory for: San Diego County Deserts
23. Wind Advisory for: San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley
24. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains
25. Wind Advisory for: Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley
26. Wind Advisory for: Western Mojave Desert
27. Winter Storm Warning for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
28. Winter Storm Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties
29. Winter Storm Warning for: Northern Trinity; Southern Trinity
30. Winter Storm Warning for: Shasta Lake Area / Northern Shasta County; Mountains Southwestern Shasta County to Western Colusa County
31. Winter Storm Warning for: South Central Siskiyou County
32. Winter Storm Warning for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada
33. Winter Storm Warning for: Western Siskiyou County; North Central and Southeast Siskiyou County
34. Winter Storm Warning for: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge
35. Winter Weather Advisory for: Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra
36. Winter Weather Advisory for: Modoc County; South Central Oregon Cascades; Siskiyou Mountains and Southern Oregon Cascades; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County
37. Winter Weather Advisory for: Mono
38. Winter Weather Advisory for: Northern Humboldt Interior
39. Winter Weather Advisory for: South Central Siskiyou County
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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
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