Weather Alert in Oregon
Fire Weather Watch issued August 11 at 1:28AM PDT until August 12 at 8:00PM PDT by NWS Medford OR
AREAS AFFECTED: Western Rogue Basin including the Illinois Valley; Eastern Rogue Valley
DESCRIPTION: The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Tuesday afternoon through Tuesday evening. * IMPACTS...Moderate to strong winds combined with critically low relative humidity can lead to rapid growth and spread of new and existing fires. Outdoor burning is banned during fire season. * AFFECTED AREA...Portions of the Rogue Valley in Fire Weather Zone 622, including Medford, White City, Gold Hill, Jacksonville, Talent, Phoenix, and Ashland. In Fire Weather Zone 620, portions of the Rogue and Illinois valleys, including Merlin, Grants Pass, Wilderville, Murphy and Provolt. * WIND...Northwest 10 to 15 mph with gusts of 20 to 25 mph. * HUMIDITY...10 to 15 percent. * DETAILEDURL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr
INSTRUCTION: Follow all fire restrictions. Avoid activities that could cause sparks. Visit weather.gov/medford/wildfire for links to fire restrictions in your area. If you have not packed your go kit yet, now is the time to do so. This includes items like important documents and essentials you cannot live without. Fill your vehicle's fuel tank. Visit ready.gov/kit for more information. A Fire Weather Watch means that critical fire weather conditions are possible during the valid watch time. These conditions could promote the rapid spread of wildfires which could become life- threatening. Check weather.gov/medford for forecast updates and a possible upgrade of the this watch to a Red Flag Warning.
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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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