Weather Alert in Maine
Special Weather Statement issued August 23 at 5:39AM EDT by NWS Caribou ME
AREAS AFFECTED: Central Penobscot; Southern Penobscot; Interior Hancock; Central Washington; Coastal Hancock; Coastal Washington; Southern Piscataquis; Northern Washington
DESCRIPTION: A very dry air mass over the area and breezy southerly winds will combine with dead and dry fuels such as grass, leaves, and twigs to create the potential for uncontrolled fire spread across the Downeast, Bangor Region and Central Highlands today. This afternoon, relative humidities will decrease to low levels between 35 and 45 percent. At the same time, winds between 10 to 15 mph mph with frequent gusts to 30 mph will continue to dry fuels and increase fire spread potential. Wind gusts may continue for a few hours after sunset but are expected to weaken later this evening with increasing relative humidity values. Extra caution should be taken to prevent wildfires. Always consult with fire officials before engaging in any open burning activities and comply with all applicable laws and regulations. Never leave an open fire unattended and always extinguish campfires completely before leaving.
INSTRUCTION: N/A
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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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