Weather Alert in Oklahoma
Flood Advisory issued April 29 at 8:41AM CDT until May 2 at 1:00AM CDT by NWS Tulsa OK
AREAS AFFECTED: Adair, OK; Cherokee, OK; Delaware, OK
DESCRIPTION: ...The National Weather Service in Tulsa has issued a Flood Advisory for the following rivers in Oklahoma... Illinois River near Tahlequah affecting Cherokee County. Illinois River at Chewey affecting Cherokee, Adair and Delaware Counties. * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Illinois River at Chewey. * WHEN...From this morning to early Friday morning. * IMPACTS...At 9.0 feet, no flooding occurs but all recreational floating along the Illinois River ceases due to strong turbulence. * ADDITIONAL DETAILS... - At 8:15 AM CDT Tuesday the stage was 4.6 feet. - Forecast...The river is expected to rise to a crest of 9.2 feet Thursday morning. This forecast only includes the next 24 hours of forecast rainfall. Additional rainfall is expected beyond 24 hours. Interests along the river should continue to monitor updates to this forecast and remain alert for a possible upgrade to a flood warning. - Action stage is 9.0 feet. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
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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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