Weather Alert in Iowa
Flood Warning issued July 11 at 6:57PM CDT until July 12 at 4:00AM CDT by NWS Quad Cities IA IL
AREAS AFFECTED: Dubuque, IA
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall. * WHERE...A portion of northeast Iowa, including the following county, Dubuque. * WHEN...Until 400 AM CDT Saturday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is occurring. Streams continue to rise due to excess runoff from earlier rainfall. Expect many areas of slow moving or standing water to continue into the overnight. * ADDITIONAL DETAILS... - At 653 PM CDT, Emergency Management reported continued flooding in the warned area due to thunderstorms, including multiple closed roads. That includes Iowa Highway 3. Between 2 and 3.5 inches of rain have fallen. - This includes the following streams and drainages... Leisure Creek, Sinnipee Creek, Catfish Creek, Cloie Branch, Whitewater Creek, Haberkorn Creek, Platte River, North Fork Catfish Creek, Little Maquoketa River and Middle Fork Catfish Creek. - Some locations that will experience flooding include... Northern and western portions of Dubuque, Asbury, Peosta, Centralia, Sageville, Durango, Graf, Dubuque County Fairgrounds, Center Grove, Edmore and Lattnerville.
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. In hilly terrain there are low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. 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 are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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