Weather Alert in California
Flash Flood Warning issued February 16 at 1:46PM PST until February 16 at 4:00PM PST by NWS Los Angeles/Oxnard CA
AREAS AFFECTED: Los Angeles, CA
DESCRIPTION: FFWLOX The National Weather Service in Los Angeles/Oxnard has extended the * Flash Flood Warning for... Southeastern Los Angeles County in southwestern California... * Until 400 PM PST. * At 146 PM PST, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. Rock slides and mud slides are expected. Minor debris flows possible on the Bridge Burn Scar. HAZARD...Flash flooding caused by thunderstorms. Rock slides and mud slides. Minor debris flows possible on the Bridge Burn Scar. SOURCE...Radar and automated gauges. IMPACT...Life threatening flash flooding. Thunderstorms producing flash flooding. Rock slides and mud slides. Minor debris flows possible on the Bridge Burn Scar. * Some locations that will experience flash flooding include... Long Beach, West Covina, Glendora, San Dimas, Pomona, Whittier, La Verne, Covina, Azusa, Baldwin Park, Diamond Bar, Hacienda Heights, Monrovia, Claremont, Santa Fe Springs, Norwalk, Cerritos, Artesia, Bellflower and Walnut.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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.
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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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