Weather Alert in Colorado
Flash Flood Warning issued August 23 at 4:35PM MDT until August 23 at 5:45PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Mesa, CO
DESCRIPTION: FFWGJT The National Weather Service in Grand Junction has extended the * Flash Flood Warning for... The Turner Gulch Burn Scar in... Southwestern Mesa County in west central Colorado... * Until 545 PM MDT. * At 435 PM MDT, Doppler radar indicated thunderstorms producing heavy rain over and near the Turner Gulch Burn Scar. Between 0.3 and 085 inches of rain have fallen. The expected rainfall rate is 0.7 to 1.5 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the basins near the western end of the Turner Gulch 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 Turner Gulch Burn Scar. SOURCE...Radar. IMPACT...Life threatening flash flooding of areas in and around the Turner Gulch Burn Scar. * Some locations that will experience flash flooding include... mainly rural areas of Southwestern Mesa County This includes the following streams and drainages... North Fork West Creek, Dolores River, West Creek, Ute Creek, North Lobe Creek, Gill Creek, Maverick Canyon, Cow Creek and Calamity Creek.
INSTRUCTION: This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the Turner Gulch 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.
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Weather Topic: What are Wall Clouds?
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A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
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Weather Topic: What are Altostratus Clouds?
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Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
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