Weather Alert in California
Red Flag Warning issued June 19 at 10:48AM PDT until June 21 at 2:00AM PDT by NWS Hanford CA
AREAS AFFECTED: Indian Wells Valley
DESCRIPTION: ...RED FLAG WARNING IN EFFECT FOR THE MOJAVE SLOPES AND DESERT... STRONGLY WESTERLY WINDS AND LOW HUMIDITY BELOW 15 PERCENT FOR FIRE WEATHER ZONES 298 AND 299. The National Weather Service in Hanford has issued a Red Flag Warning, which is in effect from 8 AM Friday to 2 AM PDT Saturday. * AFFECTED AREA...Fire weather zone 298. * WIND..West to Southwest 20 to 30 mph with gusts up to 60 mph. * HUMIDITY...Minimum RH values down to 10 to 20 percent. * HIGHEST THREAT...Close to and along the slopes. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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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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