Weather Alert in Idaho
Flood Watch issued August 26 at 10:36AM MDT until August 28 at 12:00AM MDT by NWS Missoula MT
AREAS AFFECTED: Idaho, ID; Lemhi, ID
DESCRIPTION: * WHAT...Flash flooding and debris flows caused by excessive rainfall. * WHERE...Portions of central and east central Idaho, including the following counties, in central Idaho, Idaho. In east central Idaho, Lemhi. This includes the following Specific Areas... Highway 95 from Riggins to Whitebird, Moose Fire Burn Area, Williams Creek Fire Burn Area and Magruder Fire Burn Area. * WHEN...From Wednesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in rock and mudslides along steep terrain, recent burn scars, and flood-prone locations. * ADDITIONAL DETAILS... - https://www.weather.gov/mso/hydrology
INSTRUCTION: N/A
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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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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