Weather Alerts for California
1. Air Quality Alert for: Imperial County Southwest; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley
2. Freeze Warning for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior; Northern Trinity; Southern Trinity; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County
3. Freeze Warning for: Del Norte Interior; Northern Humboldt Interior; Southern Humboldt Interior; Northern Trinity; Southern Trinity; Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County
4. Freeze Warning for: Lassen-Eastern Plumas-Eastern Sierra Counties
5. Freeze Warning for: Southeastern Mendocino Interior
6. Freeze Warning for: Surprise Valley California; Northern Washoe County
7. Freeze Warning for: Western Siskiyou County; Eastern Curry County and Josephine County; Jackson County
8. Frost Advisory for: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast
9. Frost Advisory for: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast
10. Frost Advisory for: Southwestern Mendocino Interior
11. Frost Advisory for: Southwestern Mendocino Interior
12. Frost Advisory for: Western Siskiyou County; Eastern Curry County and Josephine County; Jackson County
13. Wind Advisory for: Apple and Lucerne Valleys
14. Wind Advisory for: Indian Wells Valley; Mojave Desert
15. Wind Advisory for: Interstate 5 Corridor; Western Antelope Valley Foothills
16. Wind Advisory for: Mojave Desert Slopes
17. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta
18. Wind Advisory for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
19. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range
20. Wind Advisory for: Santa Lucia Mountains
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North America Water Vapor (Moisture)
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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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