Weather Alert in Texas
Special Weather Statement issued May 13 at 1:21PM CDT by NWS Austin/San Antonio TX
AREAS AFFECTED: Burnet; Williamson; Travis
DESCRIPTION: At 121 PM CDT, Doppler radar was tracking a strong thunderstorm near Lago Vista, or 14 miles southeast of Marble Falls, moving northeast at 35 mph. HAZARD...Wind gusts up to 50 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Austin, Round Rock, Cedar Park, Georgetown, Pflugerville, Anderson Mill, Windemere, Leander, Lakeway, Lago Vista, Hudson Bend, Liberty Hill, Spicewood, Mansfield Dam, Jonestown, Briarcliff, Point Venture, Volente, Brushy Creek, and Jollyville.
INSTRUCTION: If outdoors, consider seeking shelter inside a building. A Severe Thunderstorm Watch remains in effect until 400 PM CDT for south central Texas.
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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
