Weather Alert in Colorado
Flash Flood Warning issued August 26 at 2:37PM MDT until August 26 at 4:00PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Rio Blanco, CO
DESCRIPTION: At 237 PM MDT, Trained weather spotters reported debris flows over the southwest corner of the Lee burn scar. Between 0.2 and 0.8 inches of rain have fallen. The expected rainfall rate is 0.2 to 0.6 inches in 30 minutes. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flows which can can consist of rock, mud, vegetation and other loose materials. HAZARD...Flash flooding. Thunderstorms producing flash flooding in and around the Lee Southwest Corner Burn Scar. SOURCE...Trained spotters reported. IMPACT...Life threatening flash flooding of areas in and around the Lee Southwest Corner Burn Scar. Some locations that will experience flash flooding include... mainly rural areas of South Central Rio Blanco County This includes the following streams and drainages... West Fork Stewart Gulch, Dry Fork Piceance Creek, Dry Thirteenmile Creek, Main Prong Dry Fork Piceance Creek, Stewart Gulch, East Fork Stewart Gulch, Story Gulch and Piceance Creek.
INSTRUCTION: This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the 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 is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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