Weather Alert in California
Flood Advisory issued February 16 at 4:48PM PST until February 16 at 9:00PM PST by NWS Los Angeles/Oxnard CA
AREAS AFFECTED: San Luis Obispo, CA; Santa Barbara, CA; Ventura, CA
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of southwest California, including the following counties, San Luis Obispo, Santa Barbara and Ventura. * WHEN...Until 900 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rock slides and mud slides in areas of steep terrain. Minor debris flows. * ADDITIONAL DETAILS... - At 446 PM PST, Doppler radar indicated isolated to scattered showers moving across the Advisory area, and additional brief, moderate to heavy showers will occur through the evening hours. - Some locations that will experience flooding include... Oxnard, Thousand Oaks, Simi Valley, Ventura, Santa Maria, Santa Barbara, Camarillo, San Luis Obispo, Lompoc, Paso Robles, Fillmore, Morro Bay, Pismo Beach, Ojai, Santa Ynez, Montecito, Point Conception, Agoura Hills, Woodland Hills and Moorpark. - 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 possible rock slides and mud slides in areas of steep terrain.
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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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