Weather Alert in California
Fire Weather Watch issued June 20 at 2:14PM PDT until June 22 at 5:00AM PDT by NWS Los Angeles/Oxnard CA
AREAS AFFECTED: Santa Ynez Mountains Eastern Range
DESCRIPTION: ...RED FLAG WARNING IN EFFECT FROM 1 PM SATURDAY TO 5 AM PDT SUNDAY FOR STRONG TO DAMAGING NORTHWEST TO NORTH WINDS AND LOW RELATIVE HUMIDITY FOR THE I-5 CORRIDOR, SANTA BARBARA COUNTY INTERIOR MOUNTAINS, VENTURA COUNTY MOUNTAINS, AND ANTELOPE VALLEY INCLUDING WESTERN FOOTHILLS... .An unseasonably strong upper level trough of low pressure will move through the region through Saturday night. West to northwest winds will continue to increase this afternoon and evening brining widespread elevated to brief critical fire weather conditions across the interior and southern Santa Barbara County. The winds are expected to further increase in coverage and speed Saturday afternoon into evening, when damaging winds will likely become more widespread across the interior. The upper trough will bring a cooling trend to the region on Saturday, but humidity levels are still expected to remain low. The National Weather Service in Los Angeles/Oxnard has issued a Fire Weather Watch for strong to damaging north winds and low relative humidity, which is in effect from Saturday afternoon through late Saturday night. * WINDS...North 25 to 40 mph with damaging gusts of 50 to 65 mph possible. * RELATIVE HUMIDITY...Areas of humidity 15 to 25 percent, gradually rising late Saturday night. * IMPACTS...If fire ignition occurs, conditions are favorable for extreme fire behavior and rapid fire growth, which could threaten life and property.
INSTRUCTION: A Fire Weather Watch means that critical fire weather conditions are likely to occur in the coming days. Residents near interfaces should prepare now on what to do if a wildfire breaks out. See readyforwildfire.org and wildfirerisk.org for information..
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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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