Weather Alert in California
Winter Weather Advisory issued April 24 at 1:27PM PDT until April 27 at 11:00AM PDT by NWS Reno NV
AREAS AFFECTED: Greater Lake Tahoe Area; Greater Lake Tahoe Area
DESCRIPTION: * WHAT...Snow. Snow accumulations of 3 to 6 inches above 7000 feet with up to 10 inches along the highest peaks. 1 to 3 inches at lake level. Ridge winds gusts up to 60 mph. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM Friday to 11 AM PDT Sunday. * IMPACTS...Travel could be difficult at times. The hazardous conditions could impact the Friday evening commute and weekend travel, especially across Sierra passes. * ADDITIONAL DETAILS...Heaviest snowfall expected Friday night and Saturday morning. Snow will struggle to accumulate on roadways during the daytime hours, though isolated heavy snow showers may bring greater accumulations Saturday afternoon.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
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