Weather Alert in Illinois

Recent Locations: Moreno Valley, CA   Pomona, CA   Peoria, IL  

Severe Thunderstorm Warning issued March 26 at 10:25PM CDT until March 26 at 10:45PM CDT by NWS Lincoln IL

AREAS AFFECTED: Vermilion, IL

DESCRIPTION: At 1024 PM CDT, a severe thunderstorm was located over Fithian, or 13 miles west of Danville, moving east at 55 mph. HAZARD...Quarter size hail. SOURCE...Trained weather spotters. IMPACT...Damage to vehicles is expected. This severe storm will be near... Catlin, Oakwood, and Fairmount around 1030 PM CDT. Danville, Westville, and Tilton around 1035 PM CDT. Other locations impacted by this severe thunderstorm include Muncie and Belgium. This includes Interstate 74 between mile markers 198 and 220.

INSTRUCTION: For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning.

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Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

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

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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