Weather Alert in Arizona
Flash Flood Warning issued September 4 at 12:40PM MST until September 4 at 3:45PM 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 South Canyon Wash Basin downstream of the Dragon Bravo Fire...in Coconino County in north central Arizona...this includes the Colorado River between river miles 32 and 48. * Until 345 PM MST /445 PM MDT/. * At 1240 PM MST /140 PM MDT/, Doppler radar indicated thunderstorms producing heavy rain over the South Canyon Wash Basin downstream of the Dragon Bravo Fire. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the South Canyon Wash and other washes downriver to river mile 48. 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 South Canyon Wash Basin downstream of the Dragon Bravo Fire. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of areas in and around the South Canyon Wash Basin downstream of the Dragon Bravo Fire. * Some locations that will experience flash flooding include... Grand Canyon National Park, Bert Loper's Boat, Royal Arches, Triple Alcoves, Point Hansbrough, Anasazi Foot Bridge and Saddle Mountain Wilderness. This includes the Colorado River between river miles 32 and 48. This includes the following recreation areas and campgrounds... South Canyon Camp Site, Below Redwall Camp Site, Little Redwall Camp Site, Nautiloid Camp Site, Tatahatso Wash Camp Site, Tatahatso Camp Site, Above Martha's Camp Site, Martha's Camp Site, Redbud Alcove Camp Site, MCD Site Camp Site, Upper Buck Farm Camp Site, Buck Farm Camp Site, Below Buck Farm Camp Site, Loper's Boat Camp Site, Royal Arches Camp Site, Anasazi Bridge Camp Site, Lower Anasazi Camp Site, President Harding Camp Site, Eminence Camp Site, Above Willie Taylor Camp Site, Willie Taylor Camp Site, Triple Alcoves Camp Site, Duck N Quack Camp Site, Upper Saddle Camp Site and Lower Saddle Camp Site. This includes the following creeks, washes and rivers... Saddle Canyon, Colorado River, Buck Farm Canyon, South Canyon, "Bert's Canyon", Nautiloid Canyon, Tatahoysa Wash, "Redbud Alcove" and Tatahatso Wash.
INSTRUCTION: This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the South Canyon Wash Basin downstream of the Dragon Bravo Fire. Severe debris flows can also be anticipated across roads. Roads and driveways may be washed away in places. If you encounter flood waters...climb to safety.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
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A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
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