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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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