Weather Alert in California
Flood Warning issued February 24 at 8:04PM PST until February 25 at 6:00PM PST by NWS Eureka CA
AREAS AFFECTED: Humboldt, CA
DESCRIPTION: ...Forecast flooding changed from Minor to Moderate severity and increased in duration for the following rivers in California... Eel River at Fernbridge affecting Humboldt County. For the Eel River...including Fernbridge...Moderate flooding is forecast. * WHAT...Moderate flooding is forecast. * WHERE...Eel River at Fernbridge. * WHEN...Until Wednesday evening. * IMPACTS...At 22.0 feet, The western half of the Eel Delta may be completely flooded, especially if at or above this level for an extended period of time. This includes areas northwest of Loleta and Cannibal Island Road. A Special Action Advisory is being issued to all owners of livestock in low-lying areas of the Eel River Delta. Owners of livestock should take appropriate action to protect their animals. At 24.0 feet, Minor flooding of Highway 211 to Ferndale south of Fernbridge. Much of the Eel Delta may be flooded, including areas northwest of Loleta and the western portion of Cannibal Island Road. Flooding will be enhanced for longer duration events. A Special Action Advisory is being issued to all owners of livestock in all low-lying areas adjacent to the Eel River. Appropriate action should be taken to protect livestock. * ADDITIONAL DETAILS... - At 7:15 PM PST Tuesday the stage was 17.8 feet. - Bankfull stage is 20.0 feet. - Forecast...The river is expected to rise above flood stage late this evening to a crest of 23.4 feet tomorrow morning. It will then fall below flood stage tomorrow afternoon. - Flood stage is 20.0 feet. - Flood History...This crest compares to a previous crest of 23.5 feet on 01/21/1993. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. Be especially cautious at night when it is harder to recognize the dangers of flooding. This warning will be in effect until the river falls below its flood stage. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely. Additional information is available at weather.gov/eka. The next statement will be issued Wednesday morning at 815 AM 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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