Weather Alert in Arizona
Flash Flood Warning issued July 31 at 3:39PM MST until July 31 at 5:45PM MST by NWS Tucson AZ
AREAS AFFECTED: Santa Cruz, AZ
DESCRIPTION: FFWTWC The National Weather Service in Tucson has issued a * Flash Flood Warning for... South Central Santa Cruz County in southeastern Arizona... * Until 545 PM MST. * At 339 PM MST, Doppler radar indicated thunderstorms producing between 0.75 and 1.50 inches of heavy rain near Nogales. 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... Nogales, Rio Rico, Nogales International Airport and Kino Springs. This includes the following highways... Interstate 19 between mile markers 1 and 8. Route 82 between mile markers 1 and 13. This includes the following Flash Flood Prone Locations... Nogales Wash at Doe St Bridge.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
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