Weather Alert in Idaho
Hydrologic Outlook issued August 24 at 3:20PM MDT by NWS Boise ID
AREAS AFFECTED: Ada, ID; Adams, ID; Boise, ID; Camas, ID; Canyon, ID; Elmore, ID; Gem, ID; Gooding, ID; Jerome, ID; Owyhee, ID; Payette, ID; Twin Falls, ID; Valley, ID; Washington, ID; Baker, OR; Harney, OR; Malheur, OR
DESCRIPTION: ESFBOI Monsoon moisture will bring a threat of showers and thunderstorms to the region. High atmospheric moisture will allow for isolated heavy rain accumulations, leading to an increased threat of flash flooding. Tuesday and Wednesday currently have the highest chance for locally heavy rains, especially in southeast Oregon, near the ID-NV border, and high terrain in southwest Idaho. Conditions dry out after Thursday. Burn scars are the highest risk for flash flooding. The Wapiti Fire burn scar near Grandjean, ID, the Durkee Fire burn scar near Ironside, OR, and the Lava Fire burn scar near Cascade, ID are of particular concern for flash flooding.
INSTRUCTION: N/A
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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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