Weather Alert in California
Winter Storm Watch issued February 14 at 9:41PM PST until February 19 at 9:00AM PST by NWS San Diego CA
AREAS AFFECTED: Riverside County Mountains
DESCRIPTION: * WHAT...Two rounds of heavy snow possible. For first round Monday, 3-6 inches expected between 6000-7000 ft, 6-12 inches expected above 7000 ft. Winds could gust 60 to 70 mph, with the strongest winds on the desert slopes of the mountains. There may be breaks in snow showers or lighter snow during the day Tuesday, with the next round of heavy snow and gusty winds Wednesday into Thursday morning. * 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. Strong winds could cause tree damage. * ADDITIONAL DETAILS...For the first round Monday, snow levels will start around 6500 ft and fall to near 5000 ft. Lower snow levels near 4,000 feet possible for the next round Wednesday into Thursday.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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