Weather Alert in Arizona
Flood Watch issued August 23 at 1:18AM MST until August 25 at 8:00PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Kaibab Plateau; Marble and Glen Canyons; Grand Canyon Country
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of north central Arizona, including the following areas, Grand Canyon Country, Kaibab Plateau and Marble and Glen Canyons, including the Dragon Bravo and White Sage fire burn scars. * WHEN...From 11 AM MST /noon MDT/ this morning through Monday evening. * IMPACTS...Flash flooding will be possible in creeks, normally dry washes, swimming holes, and over recently burned areas. Raging killer currents will be possible in side canyons and narrow slot canyons. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Numerous showers and thunderstorms are expected over the next few days, capable of producing heavy rainfall over a short period of time. - Additional information is available at weather.gov/flagstaff.
INSTRUCTION: Have a way to receive Flash Flood Warnings and be prepared to take action should warnings be issued. Consider changing your plans if you were going to hike, boat, or paddleboard to a slot canyon or normally dry wash. If you do still decide to recreate, check in at a nearby visitor center or ranger station. People planning river trips on the Colorado River between Glen Canyon Dam and the west end of Grand Canyon National Park should be aware of the possibility of Flash Flooding from the side canyons and plan accordingly. The White Sage and Dragon Bravo fire burn scars will be especially susceptible to Flash Flooding. Use extreme caution if working in or around these areas.
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Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds
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