Weather Alert in California
Flood Advisory issued February 24 at 5:02PM PST until February 24 at 10:00PM PST by NWS Eureka CA
AREAS AFFECTED: Lake, CA; Mendocino, CA
DESCRIPTION: * WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...Lake County in central California... Mendocino County in northwestern California... * WHEN...Until 1000 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Ponding of water in urban or other areas is occurring or is imminent. There will be an increased risk of rock and land slides along roadways. * ADDITIONAL DETAILS... - At 502 PM PST, Doppler radar and automated rain gauges indicated heavy rain. This is causing urban and small stream flooding. Between 2 and 5 inches of rain have fallen. - Additional rainfall amounts of 0.3 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Ukiah, Lakeport, Point Arena, Ukiah Municipal Airport, Upper Lake, Middletown, Clearlake, Knobcone Camp, Hopland, Witter Springs, Saratoga Springs, North Lakeport, Boonville, Philo, Finley, Soda Bay, Mount Konocti, Glenhaven, Konocti Bay and Loch Lomond. - 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 your surroundings and do not drive on flooded roads.
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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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