Weather Alert in Colorado
Flash Flood Warning issued September 11 at 2:44PM MDT until September 11 at 5:45PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Rio Blanco, CO
DESCRIPTION: FFWGJT The National Weather Service in Grand Junction has issued a * Flash Flood Warning for... The Lee burn scar in... Central Rio Blanco County in northwestern Colorado... * Until 545 PM MDT. * At 244 PM MDT, Doppler radar indicated thunderstorms producing heavy rain over the Lee Burn Scar. The expected rainfall rate is 1 to 2 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 Piceance Creek. The debris flow can consist of rock, mud, vegetation and other loose materials. HAZARD...Dangerous flash flooding. Thunderstorms producing flash flooding/debris flows in and around the Lee Burn Scar. SOURCE...Radar. IMPACT...Dangerous flash flooding of areas in and around the Lee Burn Scar. * Some locations that will experience flash flooding include... mainly rural areas of Central Rio Blanco County and portions of County Road 5 This includes the following streams and drainages... Dry Fork Piceance Creek, East Fork Stewart Gulch, Piceance Creek, Hay Gulch, Dry Thirteenmile Creek and White River.
INSTRUCTION: This is a dangerous situation. Heavy rainfall will cause flash flooding of creeks...streams...and ditches in the Lee Burn Scar. 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 Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
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