Weather Alert in California
Flood Advisory issued February 24 at 3:10PM PST until February 25 at 6:27PM PST by NWS Reno NV
AREAS AFFECTED: Lassen, CA
DESCRIPTION: ...The National Weather Service in Reno has issued a Flood Advisory for the following rivers in California... Susan River At Susanville affecting Lassen County. For the Susan River near Susanville. Minor flooding is forecast. * WHAT...Minor flooding caused by rain and snowmelt is expected. * WHERE...Susan River at Susanville. * WHEN...From this evening to tomorrow night. * IMPACTS...At 12.0 feet, Flood Stage. Local flooding in Susanville from Lassen Street downstream along Riverside Drive...especially below Paiute Creek which enters river near Alexander Drive. Moderate lowland flooding below Susanville in Johnstonville... Leavitt Lake...Standish... and Litchfield areas. Some rural roads affected by flooding. While the gage is expected to fall quickly below flood stage impacts downstream near Standish will be delayed and more prolonged. * ADDITIONAL DETAILS... - At 2:30 PM PST Tuesday the stage was 7.4 feet. - Forecast...The river will rise to flood stage late this evening near midnight tonight. It will below flood stage at the gage early Wednesday morning. - Action stage is 10.5 feet. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: If you are in the advisory area, remain alert to possible flooding or the possibility of the advisory being upgraded to a warning. Be cautions of nighttime flooding. 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 www.weather.gov. The next statement will be issued Wednesday evening at 630 PM 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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