Weather Alerts for Idaho
1. Avalanche Watch for: Bear River Range
2. Wind Advisory for: Shoshone/Lava Beds; Arco/Mud Lake Desert; Upper Snake River Plain; Lower Snake River Plain; Eastern Magic Valley; Southern Hills/Albion Mountains; Raft River Region
3. Wind Advisory for: Southern Twin Falls County
4. Wind Advisory for: Western Magic Valley
5. Winter Storm Warning for: Bear River Range
6. Winter Weather Advisory for: Bear Lake Valley; Blackfoot Mountains; Beaverhead/Lemhi Highlands
7. Winter Weather Advisory for: Camas Prairie
8. Winter Weather Advisory for: Caribou Range; Big Hole Mountains; Centennial Mountains/Island Park
9. Winter Weather Advisory for: Central Panhandle Mountains; Lewis and Southern Nez Perce Counties
10. Winter Weather Advisory for: Frank Church Wilderness; Sawtooth/Stanley Basin; Sun Valley Region; Big Lost Highlands/Copper Basin
11. Winter Weather Advisory for: Northern Clearwater Mountains; Southern Clearwater Mountains
12. Winter Weather Advisory for: Orofino/Grangeville Region; Lower Hells Canyon/Salmon River Region
13. Winter Weather Advisory for: Southwest Highlands; Owyhee Mountains; Malheur County
14. Winter Weather Advisory for: West Central Mountains; Boise Mountains
15. Winter Weather Advisory for: Western Lemhi County; Eastern Lemhi County
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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
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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 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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