Weather Alert in Arizona
Flash Flood Warning issued July 15 at 7:09PM MST until July 15 at 9:15PM MST by NWS Tucson AZ
AREAS AFFECTED: Pima, AZ
DESCRIPTION: FFWTWC The National Weather Service in Tucson has issued a * Flash Flood Warning for... Northeastern Pima County in southeastern Arizona... * Until 915 PM MST. * At 709 PM MST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. An automated rain gauge at Skyline Rd and Finger Rock Wash recorded 0.94 inches of rain in 15 minutes. Additional rainfall amounts up 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, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Tucson, Catalina, Oro Valley, Casas Adobes, Flowing Wells, Tortolita, Catalina State Park, Catalina Foothills and Sabino Canyon Recreation Area. This includes Route 77 between mile markers 71 and 87. This includes the following Flash Flood Prone Locations... 1st Ave north of Fort Lowell Rd, Overton Rd at Canada del Oro, Snyder Rd from Kolb Rd to Sabino Canyon Rd and E Wilds Rd at the Canada del Oro. This includes the following streams and drainages... Pantano Wash, Tanque Verde Wash, Rillito River, Bird Canyon, Santa Cruz River, Esperero Wash, Oro, Caada del, Sutherland Wash, Chalk Creek, Ventana Canyon Wash, Sabino Creek, Big Wash and Chirreon Wash.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
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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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