Weather Alert in Iowa

Flood Watch issued July 11 at 7:22PM CDT until July 12 at 4:00AM CDT by NWS Quad Cities IA IL

AREAS AFFECTED: Jefferson; Henry; Des Moines; Van Buren; Lee; Henderson; Warren

DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues to be likely. Multiple rounds of thunderstorms with very heavy rainfall will continue tonight. An additional two to three inches of rain, with locally higher amounts are expected. * WHERE...In Illinois, Henderson and Warren Counties and Iowa, Des Moines, Henry IA, Jefferson, Lee and Van Buren Counties. * WHEN...Until 4 AM CDT Saturday. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - Flood safety information can be found at www.weather.gov/safety/flood.

INSTRUCTION: Do not drive into water covered roadways. The danger of flash flooding increases at night when it is harder to see. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

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Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Evaporation Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog

Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

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