Weather Alert in Illinois
Flood Advisory issued August 12 at 6:29PM CDT until August 12 at 7:45PM CDT by NWS Chicago IL
AREAS AFFECTED: Cook, IL
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following county, Cook. * WHEN...Until 745 PM CDT. * IMPACTS...Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 627 PM CDT, Doppler radar indicated that heavy rainfall has moved out of the area. Flooding from earlier showers and thunderstorms may continue over the next few hours. Additional shower activity is possible in the area this evening, which may prevent some flooded areas from receding. - Some locations that will experience flooding include... Chicago, Evanston, Skokie, Oak Park, Park Ridge, Niles, Irving Park, Austin, West Ridge, West Town, Lake View, Lincoln Park, Melrose Park, Maywood, Franklin Park, Norridge, Portage Park, Belmont Cragin, Albany Park and Dunning. - http://www.weather.gov/safety/flood
INSTRUCTION: A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.
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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
Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
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