Weather Alert in California
Flood Watch issued February 23 at 8:21PM PST until February 24 at 10:00PM PST by NWS Eureka CA
AREAS AFFECTED: Southeastern Mendocino Interior
DESCRIPTION: ...The Flood Watch continues for the following rivers in California... Russian River near Hopland affecting Southeastern Mendocino Interior zone. For the Russian River...including Hopland...flooding is possible. * WHAT...Flooding is possible. * WHERE...Russian River near Hopland. * WHEN...From Tuesday afternoon to Tuesday evening. * 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. * ADDITIONAL DETAILS... - At 7:45 PM PST Monday the stage was 3.4 feet. - Forecast...Flood stage may be reached tomorrow afternoon. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. 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. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. Additional information is available at weather.gov/eka. The next statement will be issued Tuesday morning at 900 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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