Weather Alert in Arizona
Flood Advisory issued September 4 at 9:29PM MST until September 5 at 12:30AM MST by NWS Flagstaff AZ
AREAS AFFECTED: Coconino, AZ
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Havasu Creek including Supai. * WHEN...Until 1230 AM MST. * IMPACTS...Minor flooding in creeks and normally dry washes is imminent or occurring. * ADDITIONAL DETAILS... - At 926 PM MST, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 0.4 and 0.75 inches of rain have fallen. - This includes the following creeks, washes and rivers... Pasture Wash, Havasu Creek and Little Coyote Canyon. Additional rainfall amounts of 0.25 to 0.5 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Grand Canyon National Park, Little Navajo Falls, Mooney Falls, Beaver Falls, Havasupai Reservation and Supai. - This includes the Colorado River between river miles 157 and 158. This includes the following swimming holes... All swimming holes on Havasu Creek near Supai. - Additional information is available at weather.gov/flagstaff.
INSTRUCTION: Be especially cautious at night when it is harder to recognize the dangers of flooding. Stay away or be swept away! The banks of creeks and washes are unstable and unsafe during any flooding event. Low water crossings will become dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.
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Weather Topic: What are Cirrocumulus Clouds?
Home - Education - Cloud Types - Cirrocumulus Clouds
Next Topic: Cirrostratus Clouds
Cirrocumulus clouds form at high altitudes (usually around 5 km)
and have distinguishing characteristics displayed in a fine layer of
small cloud patches. These small cloud patches are sometimes referred to as
"cloudlets" in relation to the whole cloud formation.
Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the
water droplets in the cloud freeze into ice crystals and the cloud becomes a
cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud
formations generally pass rapidly.
Next Topic: Cirrostratus Clouds
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
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