Weather Alert in California
Flood Advisory issued September 2 at 4:22AM PDT until September 2 at 7:30AM PDT by NWS Los Angeles/Oxnard CA
AREAS AFFECTED: San Luis Obispo, CA
DESCRIPTION: * WHAT...Minor mud and debris flows caused by excessive rainfall are possible. * WHERE...The Madre Burn Area in San Luis Obispo County. * WHEN...Until 730 AM PDT. * IMPACTS...Minor mud and debris flow may occur from the Madre burn scar. Rises in small streams and normally dry arroyos. * ADDITIONAL DETAILS... - At 418 AM PDT, Doppler radar indicated heavy rain due to showers and thunderstorms moving over the Madre burn scar. Minor flooding and mud and debris flows are possible in the advisory area early this morning. - Some locations that will experience flooding include... Carrizo Plain. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Be aware of your surroundings and do not drive on flooded roads. 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 Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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