Weather Alert in California
Flood Warning issued February 25 at 1:50PM PST until February 26 at 5:10PM PST by NWS Sacramento CA
AREAS AFFECTED: Tehama, CA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in California... Sacramento River At Vina Woodson Bridge affecting Tehama County. Sacramento River At Tehama Bridge affecting Tehama County. Sacramento River At Ord Ferry affecting Glenn and Butte Counties. .Recent precipitation has lead to to minor flooding at Ord Ferry, Tehama Bridge and Vina Woodson Bridge on the Upper Sacramento River System. For the Upper Sacramento River...including Tehama Bridge, Vina Woodson Bridge, Ord Ferry...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Sacramento River at Vina Woodson Bridge. * WHEN...Until tomorrow afternoon. * IMPACTS...At 183.9 feet, Tehama County Park on left bank of river is closed due to flooding. Water is up to the top steps of the recreation center at the RV Park south of the bridge and on left bank of river with spaces 15-33 taking on water. At 184.9 feet, South Avenue starts to flood east of the river. At 185.9 feet, South Avenue is flooded and closed. RV Park south of the bridge and on left bank of river experiences more flooding with RV Park office, spaces 1-14, 34-52, and 62-72 impacted. * ADDITIONAL DETAILS... - At 1:00 PM PST Wednesday the stage was 185.8 feet. - Bankfull stage is 180.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 1:00 PM PST Wednesday was 185.8 feet. - Forecast...The river is expected to fall below flood stage just after midnight tonight and continue falling to 171.8 feet early Friday afternoon. - Flood stage is 183.0 feet. - Flood History...This crest compares to a previous crest of 185.8 feet on 03/06/2006. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. For more hydrologic information and stage definitions refer to the following web site: wrh.noaa.gov/sto/hydro_data.php The next statement will be issued Thursday afternoon at 200 PM PST.
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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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