Weather Alert in Minnesota
Dense Fog Advisory issued September 11 at 3:37AM CDT until September 11 at 11:00AM CDT by NWS Duluth MN
AREAS AFFECTED: Koochiching; North St. Louis; Northern Cook/Northern Lake; North Itasca; Central St. Louis; Southern Lake/North Shore; Southern Cook/North Shore; North Cass; South Itasca; South Cass; Crow Wing; Northern Aitkin; South Aitkin; Carlton/South St. Louis; Pine; Douglas; Bayfield; Ashland; Iron; Burnett; Washburn; Sawyer; Price
DESCRIPTION: * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Koochiching, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. In Wisconsin, Price, Ashland, Bayfield, Burnett, Douglas, Iron, Sawyer, and Washburn Counties. This includes the Tribal Lands of the northwestern area of the Lac du Flambeau Band, the Grand Portage Reservation, the Bad River Reservation, the Lac Courte Oreilles Reservation, the Fond du Lac Band, the St. Croix Band in Burnett County, the Red Cliff Band, the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas and the Bois Forte Band, Lake Vermilion, Deer Creek and, Nett Lake areas. Other locations including Voyageurs National Park, Madeline Island and the Apostle Islands National Lakeshore. The entire Boundary Waters is also included. * WHEN...Until 11 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.
INSTRUCTION: If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
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
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