Weather Alert in Arizona
Flash Flood Warning issued July 16 at 1:38PM MST until July 16 at 4:30PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Coconino, AZ
DESCRIPTION: FFWFGZ The National Weather Service in Flagstaff has issued a * Flash Flood Warning for... Coconino County in north central Arizona...This includes the Colorado River between mile markers 20 and 51. * Until 430 PM MST /530 PM MDT/. * At 138 PM MST /238 PM MDT/, Doppler radar indicated thunderstorms producing heavy rain across the portions of the Grand Canyon northeast of the North Rim. Between 1 and 1.75 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch 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 Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
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
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