Weather Alerts for California
1. Air Quality Alert for: Coachella Valley
2. Air Quality Alert for: Imperial County Southwest; Imperial County West; Imperial Valley
3. Freeze Warning for: Western Siskiyou County
4. Frost Advisory for: Del Norte Interior; Northern Humboldt Coast; Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior; Mendocino Coast; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Southwestern Mendocino Interior; Southeastern Mendocino Interior; Northern Lake County; Southern Lake County
5. High Wind Warning for: Mojave Desert Slopes
6. High Wind Warning for: Santa Susana Mountains
7. High Wind Warning for: Western Santa Monica Mountains Recreational Area; Western San Gabriel Mountains and Highway 14 Corridor
8. Lake Wind Advisory for: Kern River Valley
9. Wind Advisory for: Eastern San Gabriel Mountains
10. Wind Advisory for: Indian Wells Valley; Mojave Desert
11. Wind Advisory for: Riverside County Mountains; San Diego County Mountains; Apple and Lucerne Valleys; Coachella Valley; San Diego County Deserts
12. Wind Advisory for: San Bernardino and Riverside County Valleys-The Inland Empire; Santa Ana Mountains and Foothills; Orange County Inland
13. Wind Advisory for: San Bernardino County Mountains; San Gorgonio Pass Near Banning
14. Wind Advisory for: San Bernardino County Mountains; San Gorgonio Pass Near Banning
15. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
16. Wind Advisory for: Santa Clarita Valley; Ventura County Beaches; Ventura County Inland Coast; Central Ventura County Valleys; Calabasas and Agoura Hills; Western San Fernando Valley; Southeastern Ventura County Valleys
17. Wind Advisory for: Santa Susana Mountains
18. Wind Advisory for: Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains
19. Wind Advisory for: Southern Ventura County Mountains; Northern Ventura County Mountains; Interstate 5 Corridor
20. Wind Advisory for: Western Antelope Valley Foothills; Antelope Valley
21. Wind Advisory for: Western Mojave Desert
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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