Weather Alert in California
Flood Warning issued February 25 at 9:00AM PST until February 26 at 7:26PM PST by NWS Sacramento CA
AREAS AFFECTED: Butte, CA; Glenn, CA
DESCRIPTION: ...The National Weather Service in Sacramento CA has issued a Flood Warning for the following rivers in California... Sacramento River At Ord Ferry affecting Glenn and Butte Counties. .Recent precipitation will lead to minor flooding at Ord Ferry, Tehama Bridge and Vina Woodson Bridge on the Upper Sacramento River System. For the Upper Sacramento River...Ord Ferry, Tehama Bridge, and Vina Woodson Bridge...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Sacramento River at Ord Ferry. * WHEN...From this evening to tomorrow evening. * IMPACTS...At 110.3 feet, Head cuts in 3Bs silt weir start overflow into Butte Basin, flooding dips on Ord Ferry Road west of River Road in Butte County. Persistent flows at or above this level increase flooding in Butte Basin. Ord Ferry Road and additional roads in Glenn and Colusa counties are closed due to flooding. At 112.0 feet, At 112 to 113 feet, water inundates portions of Ord Ferry Road (County Road 32) in Glenn County from CA-45 east to the county line at the Sacramento River. At 113.8 feet, Design overflow level for M&T, 3Bs and Goose Lake flood control facilities to divert flood flows into Butte Basin. M&T overflows close River Road from Ord Ferry Road to Chico Road. Ord Ferry Road is already closed. At 114.0 feet, Designated flood stage left bank. * ADDITIONAL DETAILS... - At 7:45 AM PST Wednesday the stage was 108.2 feet. - Bankfull stage is 114.0 feet. - Forecast...The river is expected to rise above flood stage late this evening to a crest of 114.6 feet tomorrow morning. It will then fall below flood stage early tomorrow afternoon. - Flood stage is 114.0 feet. - Flood History...This crest compares to a previous crest of 114.8 feet on 03/21/2011. - 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 morning at 900 AM PST.
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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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