Weather Alert in California
Winter Storm Watch issued February 15 at 5:00AM PST until February 19 at 9:00AM PST by NWS San Diego CA
AREAS AFFECTED: Riverside County Mountains
DESCRIPTION: * WHAT...Heavy snow possible. For first round Monday, 3-6 inches expected between 6000-7000 ft, 6-12 inches expected above 7000 ft. West winds gusting to 55 mph on the ridges and desert slopes. Occasional light snow during the day Tuesday, with the next round of moderate snow and gusty winds Wednesday into Thursday morning. Wind gusts as high as 70 mph possible on the desert slopes of the mountains late Tuesday and Wednesday. * WHERE...Riverside County Mountains. * WHEN...From Monday morning through Thursday morning. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult to impossible. The hazardous conditions could impact the Monday evening and Tuesday morning commutes. Very strong winds could cause extensive tree damage. * ADDITIONAL DETAILS...For the first round Monday, snow levels will start around 7000 ft and fall to near 5000 ft. Lower snow levels near 4,000 feet possible Wednesday morning and Thursday.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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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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