Weather Alert in Iowa
Flash Flood Warning issued July 11 at 9:21PM CDT until July 12 at 2:30AM CDT by NWS Quad Cities IA IL
AREAS AFFECTED: Des Moines, IA; Henry, IA; Lee, IA; Van Buren, IA; Hancock, IL; Henderson, IL; McDonough, IL; Warren, IL; Clark, MO; Scotland, MO
DESCRIPTION: At 921 PM CDT, local law enforcement reported water covering River Road by the Keokuk Yacht club. Heavy rain was ending across the warning area with between 2 and 3.5 inches of rain having occurred in less than 2 hours across parts of the area. Despite the rain diminishing, ongoing high water and flash flooding is still likely. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Law enforcement reported. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. Some locations that will experience flash flooding include... Burlington, Fort Madison, Keokuk, Monmouth, Kahoka, Memphis, Oquawka, Nauvoo, West Burlington, Hamilton, Warsaw, La Harpe, Roseville, West Point, Dallas City, Danville, Donnellson, Montrose, Stronghurst and Kirkwood.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Be aware of your surroundings and do not drive on flooded roads. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.
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Weather Topic: What is Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
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