Weather Alert in Arizona
Flood Watch issued September 4 at 6:22PM MST until September 6 at 5:00PM MST by NWS Tucson AZ
AREAS AFFECTED: Upper Santa Cruz River and Altar Valleys including Nogales; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; Southeast Pinal County including Kearny/Mammoth/Oracle; Upper San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox; Upper Gila River and Aravaipa Valleys including Clifton/Safford; White Mountains of Graham and Greenlee Counties including Hannagan Meadow; Galiuro and Pinaleno Mountains including Mount Graham; Chiricahua Mountains including Chiricahua National Monument; Dragoon/Mule/Huachuca and Santa Rita Mountains including Bisbee/Canelo Hills/Madera Canyon; Santa Catalina and Rincon Mountains including Mount Lemmon/Summerhaven
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of Southeast Arizona, including the following areas, Catalina and Rincon Mountains, Chiricahua Mountains, Dragoon and Mule and Huachuca and Santa Rita Mountains, Eastern Cochise County below 5000 feet, Galiuro and Pinaleno Mountains, Southeast Pinal County, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley, Upper Santa Cruz River Valley/Altar Valley and White Mountains of Graham and Greenlee Counties. * WHEN...From Friday afternoon through Saturday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Moisture associated with Hurricane Lorena may bring periods of heavy rain to portions of southeast Arizona from scattered showers and thunderstorms. Rainfall amounts of 1 to 1.5 inches with localized amounts to 2.5 inches possible. - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
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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
Weather Topic: What is Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
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