Weather Alert in California

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Flash Flood Warning issued February 16 at 10:57AM PST until February 16 at 2:00PM PST by NWS Los Angeles/Oxnard CA

AREAS AFFECTED: Los Angeles, CA

DESCRIPTION: FFWLOX The National Weather Service in Los Angeles/Oxnard has issued a * Flash Flood Warning for... Central and Southern Los Angeles County in southwestern California including the Eaton Burn Scar... * Until 200 PM PST. * At 1057 AM PST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. The expected rainfall rate is 0.5 to 1 inch in 1 hour. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Rock and mud slides. Minor debris flows at recent burn scars including the Eaton burn scar. * Some locations that will experience flash flooding include... Long Beach, Downtown Los Angeles, Griffith Park, Hollywood, Inglewood, Culver City, Burbank, Alhambra, North Hollywood, Pasadena, Venice, Santa Monica, Manhattan Beach, Van Nuys, Hermosa Beach, Torrance, Encino, Redondo Beach, Mount Wilson, and Eaton Burn Scar.

INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads, and be aware of rock slides and mud slides around high terrain. Follow direction of Emergency Management and Law Enforcement officials.

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - 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

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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