Weather Alert in California
Flood Advisory issued February 18 at 1:15AM PST until February 18 at 6:00AM PST by NWS Los Angeles/Oxnard CA
AREAS AFFECTED: Los Angeles, CA; Ventura, CA
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of southwest California, including the following counties, Los Angeles and Ventura. * WHEN...Until 600 AM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rock and mud slides possible. Minor debris flows possible. * ADDITIONAL DETAILS... - At 114 AM PST, Doppler radar indicated heavy showers across the region. Activity will continue through the pre-dawn hours of Wednesday. Minor flooding is ongoing or expected to begin shortly in the advisory area, and continue through the overnight hours. Rock and mud slides possible. Minor debris flows possible. - Some locations that will experience flooding include... Long Beach, Oxnard, Thousand Oaks, Simi Valley, Ventura, Camarillo, Fillmore, Malibu, Ojai, Chatsworth, Woodland Hills, Northridge, Encino, Van Nuys, Agoura Hills, Santa Clarita, North Hollywood, Santa Monica and Beverly Hills. And burn scars across the Flood Advisory area. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of the potential for rock slides and mud slides in areas of steep terrain.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - 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.
Next Topic: Nimbostratus Clouds
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
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