Weather Alert in Oklahoma
Flood Warning issued August 27 at 2:16PM CDT until August 30 at 12:09PM CDT by NWS Tulsa OK
AREAS AFFECTED: Cherokee, OK
DESCRIPTION: ...The National Weather Service in Tulsa OK has issued a Flood Warning for the following rivers in Oklahoma... Illinois River near Watts affecting Delaware and Adair Counties. Illinois River at Chewey affecting Delaware, Adair and Cherokee Counties. Illinois River near Tahlequah affecting Cherokee County. * WHAT...Minor flooding is forecast. * WHERE...Illinois River near Tahlequah. * WHEN...From Friday afternoon to early Saturday afternoon. * IMPACTS...At 12.0 feet, minor flooding occurs from near Hanging Rock downstream towards Tahlequah. Extreme turbulence makes the river too hazardous for floating. * ADDITIONAL DETAILS... - At 1:30 PM CDT Wednesday the stage was 5.1 feet. - Forecast...The river is expected to rise above flood stage Friday afternoon to a crest of 12.2 feet early Saturday morning. It will then fall below flood stage Saturday morning. - Flood stage is 11.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: N/A
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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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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