Weather Alert in California
Flood Advisory issued February 8 at 11:11AM PST until February 8 at 2:15PM PST by NWS Eureka CA
AREAS AFFECTED: Del Norte, CA; Humboldt, CA
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Del Norte County in northwestern California... Humboldt County in northwestern California... * Until 215 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry arroyos. Water over roadways. There will be an increased risk of rock falls and land slides along roadways. * ADDITIONAL DETAILS... - At 1110 AM PST, Doppler radar and rain gauges indicated heavy rain. Overflowing poor drainage areas will cause minor flooding in the advisory area. Between 0.4 and 1.8 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Eureka, Arcata, Crescent City, Hoopa, Orick, Willow Creek, Orleans, Klamath, Grizzly Creek Redwoods State Park, Jedediah Smith State Park, Jack McNamera Field, Honeydew, Fortuna, Rio Dell, Trinidad, Westhaven-Moonstone, McKinleyville, Weitchpec, Maple Creek and Carlotta. - http://www.weather.gov/safety/flood
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 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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