Weather Alert in Colorado
Flash Flood Warning issued August 28 at 3:31PM MDT until August 28 at 4:45PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Rio Blanco, CO
DESCRIPTION: At 331 PM MDT, Doppler radar indicated thunderstorms produced heavy rain over the Lee Fire Burn Scar. Between 0.4 and 0.7 inches of rain have fallen. Flash flooding is already occurring. Excessive rainfall over the burn scar will result in debris flow. Even though heavy rain has ended, debris flow and mudslides were reported over County Road 5 near mile marker 30 to the west of the Lee Fire burn scar. The debris flow can consist of rock, mud, vegetation and other loose materials. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding in and around the Lee Fire Burn Scar. SOURCE...Radar. IMPACT...Life threatening flash flooding of areas in and around the Lee Fire Burn Scar and along County Road 5 near mile marker 30 on the west side of the Lee Fire Burn Scar. Some locations that will experience flash flooding include... mainly rural areas of Central Rio Blanco County This includes the following streams and drainages... Piceance Creek, Dry Fork Piceance Creek and Yellow Creek.
INSTRUCTION: This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the Lee Fire Burn Scar. Severe debris flows can also be anticipated across roads. Roads and driveways may be washed away in places. If you encounter flood waters...climb to safety. Move away from recently burned areas. Life-threatening flooding of creeks, roads and normally dry arroyos is likely. The heavy rains will likely trigger rockslides, mudslides and debris flows in steep terrain, especially in and around these areas.
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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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