Weather Alert in Colorado
Flood Watch issued August 25 at 2:42PM MDT until August 27 at 12:00AM MDT by NWS Grand Junction CO
AREAS AFFECTED: Roan and Tavaputs Plateaus; Grand Valley; Debeque to Silt Corridor; Central Colorado River Basin; Grand and Battlement Mesas; Gore and Elk Mountains/Central Mountain Valleys; Central Gunnison and Uncompahgre River Basin; West Elk and Sawatch Mountains; Flat Tops; Upper Gunnison River Valley; Uncompahgre Plateau/Dallas Divide; Northwestern San Juan Mountains; Southwest San Juan Mountains; Paradox Valley/Lower Dolores River; Four Corners/Upper Dolores River; Animas River Basin; San Juan River Basin; Southeast Utah; La Sal and Abajo Mountains; Canyonlands/Natural Bridges
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of Colorado, including the following areas, along the I-70 corridor, Flat Tops, Four Corners, Central Mountain Valleys, Grand Valley, Grand and Battlement Mesas, Western San Juan Mountains, Uncompahgre Plateau and Dallas Divide, Upper Gunnison River Valley and West Elk and Sawatch Mountains, and portions of southeast Utah, including the following areas, Canyonlands/Natural Bridges and the La Sal and Abajo Mountains. This also includes the Elk/Lee Complex, Turner Gulch, Deer Creek, Stoner Mesa, and South Rim burn scars. * WHEN...From Tuesday morning through Tuesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Area creeks and streams are running high and could flood with more heavy rain. Heavy rain over burn scars may lead to debris flows. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
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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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