Weather Alert in Arizona
Flash Flood Warning issued August 23 at 4:02PM MST until August 23 at 7:00PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Coconino, AZ
DESCRIPTION: FFWFGZ The National Weather Service in Flagstaff has issued a * Flash Flood Warning for... The Dragon Bravo North and South Canyon Washes in... Coconino County in north central Arizona this includes the Colorado River between river miles 21 and 32... * Until 700 PM MST /800 PM MDT/. * At 402 PM MST /502 PM MDT/, Doppler radar indicated thunderstorms producing heavy rain over the Dragon Bravo North and South Canyon Washes. Between 0.25 and 0.5 inches of rain have fallen. Additional rainfall amounts of 0.25 to 0.75 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the North and South Canyon Washes. 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 Dragon Bravo North and South Canyon Washes. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of areas in and around the Dragon Bravo North and South Canyon Washes. * Some locations that will experience flash flooding include... Grand Canyon National Park and Saddle Mountain Wilderness. This includes the Colorado River between river miles 21 and 32. This includes the following recreation areas and campgrounds... Navajo Pinnacle Camp Site, Lone Cedar Camp Site, Cave Camp Site, Above Tiger Wash Camp Site, Tiger Wash Camp Site, Below Tiger Wash Camp Site, Shinumo Wash Camp Site, Island Camp Site, Fence Fault Camp Site, Sandpile Camp Site, Upper South Canyon Camp Site and South Canyon Camp Site. This includes the following creeks, washes and rivers... House Rock Wash, North Canyon Wash, Colorado River, South Canyon, Shinumo Wash, Sheep Spring Wash, To Hajisho, Tiger Wash, North Canyon and "22- Mile Wash".
INSTRUCTION: This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the Dragon Bravo North and South Canyon Washes. 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 Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
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
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