Weather Alert in California

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Flood Warning issued February 24 at 7:59AM PST until February 25 at 4:00AM PST by NWS Eureka CA

AREAS AFFECTED: Mendocino, CA

DESCRIPTION: ...The National Weather Service in Eureka has issued a Flood Warning for the following rivers in California... Russian River near Hopland affecting Mendocino County. For the Russian River...including Hopland...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Russian River near Hopland. * WHEN...From this morning to late tonight. * IMPACTS...At 15.0 feet, Flooding of Highway 175 is expected at the approaches to the Russian River bridge. Expect flooding of cropland on the right bank of river. At 17.0 feet, Significant flooding of Highway 175 at the approaches to the Russian River bridge. Minor flooding of Highway 222 near Ukiah, and in crop land along the left and right banks of the Russian River near Hopland. * ADDITIONAL DETAILS... - At 7:45 AM PST Tuesday the stage was 5.7 feet. - Bankfull stage is 21.0 feet. - Forecast...The river is expected to rise above flood stage late this morning to a crest of 16.6 feet this evening. It will then fall below flood stage late this evening. - Flood stage is 15.0 feet. - Flood History...This crest compares to a previous crest of 16.7 feet on 10/24/2021. - 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. Flooding is occurring or is imminent. Most flood related deaths occur in automobiles. Do not attempt to cross water covered bridges, dips, or low water crossings. Never try to cross a flowing stream, even a small one, on foot. To escape rising water find another route over higher ground. 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 this evening at 800 PM PST.

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - 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.

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