Weather Alert in Iowa

Recent Locations: Neodesha, KS Matlock, IA

Tornado Watch issued April 2 at 1:44PM CDT until April 2 at 8:00PM CDT by NWS Quad Cities IA IL

AREAS AFFECTED: Benton, IA; Buchanan, IA; Cedar, IA; Clinton, IA; Delaware, IA; Des Moines, IA; Dubuque, IA; Henry, IA; Iowa, IA; Jackson, IA; Jefferson, IA; Johnson, IA; Jones, IA; Keokuk, IA; Lee, IA; Linn, IA; Louisa, IA; Muscatine, IA; Scott, IA; Van Buren, IA; Washington, IA; Bureau, IL; Carroll, IL; Hancock, IL; Henderson, IL; Henry, IL; Jo Daviess, IL; McDonough, IL; Mercer, IL; Putnam, IL; Rock Island, IL; Stephenson, IL; Warren, IL; Whiteside, IL; Clark, MO; Scotland, MO

DESCRIPTION: THE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 89 IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 13 COUNTIES IN NORTH CENTRAL ILLINOIS BUREAU PUTNAM IN NORTHWEST ILLINOIS CARROLL HENRY IL JO DAVIESS MERCER ROCK ISLAND STEPHENSON WHITESIDE IN WEST CENTRAL ILLINOIS HANCOCK HENDERSON MCDONOUGH WARREN IN IOWA THIS WATCH INCLUDES 21 COUNTIES IN EAST CENTRAL IOWA BENTON CEDAR CLINTON IOWA JACKSON JOHNSON JONES LINN MUSCATINE SCOTT IN NORTHEAST IOWA BUCHANAN DELAWARE DUBUQUE IN SOUTHEAST IOWA DES MOINES HENRY IA JEFFERSON KEOKUK LEE LOUISA VAN BUREN WASHINGTON IN MISSOURI THIS WATCH INCLUDES 2 COUNTIES IN NORTHEAST MISSOURI CLARK SCOTLAND THIS INCLUDES THE CITIES OF ALEDO, ANAMOSA, BETTENDORF, BURLINGTON, CARTHAGE, CEDAR RAPIDS, CLINTON, CREDIT ISLAND, DAVENPORT, DUBUQUE, FAIRFIELD, FREEPORT, GALENA, GENESEO, HENNEPIN, INDEPENDENCE, IOWA CITY, KAHOKA, KEOKUK, KEOSAUQUA, MACOMB, MANCHESTER, MAQUOKETA, MARENGO, MEMPHIS, MOLINE, MONMOUTH, MOUNT CARROLL, MOUNT PLEASANT, MUSCATINE, OQUAWKA, PRINCETON, ROCK ISLAND, SIGOURNEY, STERLING, TIPTON, VINTON, WAPELLO, AND WASHINGTON.

INSTRUCTION: N/A

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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