Weather Alert in Arizona
Flash Flood Warning issued July 16 at 3:08PM MST until July 16 at 4:30PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Coconino, AZ
DESCRIPTION: At 308 PM MST /408 PM MDT/, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 1.75 inches of rain have fallen. Additional rainfall amounts of 0.25 to 0.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, normally dry washes, urban areas, highways, streets and underpasses. Some locations that will experience flash flooding include... Horseshoe Reservoir, Saddle Mountain Overlook, Point Imperial Picnic Area, Grand Canyon National Park, Bert Loper's Boat, Royal Arches, Anasazi Foot Bridge, Point Hansbrough, Triple Alcoves and Saddle Mountain Wilderness. This includes the Colorado River between mile markers 20 and 51. This includes the following creeks, washes and rivers... South Canyon, Nautiloid Canyon, North Canyon Wash, Saddle Canyon, Sheep Spring Wash, To Hajisho, Colorado River, "Redbud Alcove", Bright Angel Creek, Tatahoysa Wash, House Rock Wash, Tatahatso Wash, Tiger Wash, Shinumo Wash, Buck Farm Canyon, Nankoweap Canyon, "22- Mile Wash", "Bert's Canyon", North Canyon and Little Nankoweap Creek.
INSTRUCTION: Flooding of washes and creeks will occur, some dirt roads will become muddy and impassable. Paved roads and underpasses could become flooded as well.
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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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