Weather Alert in Oklahoma
Flood Advisory issued August 29 at 11:13AM CDT until August 30 at 1:00AM CDT by NWS Tulsa OK
AREAS AFFECTED: Cherokee, 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. * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Illinois River near Tahlequah. * WHEN...From this morning to just after midnight tonight. * IMPACTS...At 9.0 feet, no flooding occurs but all recreational floating along the Illinois River ceases at and above 9.5 feet. * ADDITIONAL DETAILS... - At 10:30 AM CDT Friday the stage was 9.2 feet. - Forecast...The river is near its crest and is expected to fall below action stage by early this evening and remain below flood stage. - Action stage is 9.0 feet. - Flood stage is 11.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: N/A
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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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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