Weather Alert in Arizona
Flash Flood Warning issued September 4 at 12:09PM MST until September 4 at 6:15PM 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 North Canyon Wash Basin downstream of the Dragon Bravo Fire scar in...Coconino County in north central Arizona...this includes the Colorado River between mile markers 17 and 21. * Until 615 PM MST /715 PM MDT/ Thursday. * At 1209 PM MST /109 PM MDT/, Doppler radar indicated thunderstorms producing heavy rain over the North Canyon Wash Basin downstream of the Dragon Bravo Fire scar. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the North Canyon Wash. 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 North Canyon Wash Basin downstream of the Dragon Bravo Fire scar. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of areas in and around the North Canyon Wash Basin downstream of the Dragon Bravo Fire scar. * Some locations that will experience flash flooding include... Grand Canyon National Park and Saddle Mountain Wilderness. This includes the Colorado River between mile markers 17 and 21. This includes the following recreation areas and campgrounds... House Rock Camp Site, 18 Mile Wash Camp Site, 18 Mile Ledges Camp Site, Upper North Canyon Camp Site and Lower North Canyon Camp Site. This includes the following creeks, washes and rivers... North Canyon, "18- Mile Wash", "19- Mile Canyon", Colorado River, South Canyon, House Rock Wash, Hanaa Ninadzidzahi and North Canyon Wash.
INSTRUCTION: Flash flooding is occurring or imminent downstream of the Dragon Bravo Fire scar. Severe debris flow are expected across roads and in remote canyon drainages on the Kaibab Plateau east of State Route 67. Campers and hikers should get away from creeks and move to higher ground immediately! Stay away or be swept away!
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Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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