Weather Alert in Minnesota
Extreme Heat Watch issued June 18 at 2:23PM CDT until June 22 at 7:00PM CDT by NWS Duluth MN
AREAS AFFECTED: Koochiching; North St. Louis; Northern Cook/Northern Lake; North Itasca; Central St. Louis; North Cass; South Itasca; Northern Aitkin; Carlton/South St. Louis; Douglas; Bayfield; Ashland; Iron
DESCRIPTION: * WHAT...Dangerously hot conditions with heat index values up to 101 possible. * WHERE...In Minnesota, Northern Aitkin, Koochiching, North Cass, Itasca, Carlton, St. Louis, and Northern Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Douglas, and Iron Counties. This includes the Tribal Lands of the Bad River Reservation, the Red Cliff Band, the Mille Lacs Band, Big Sandy Lake area, the northwestern area of the Lac du Flambeau Band, the Fond du Lac Band and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including Madeline Island, the Apostle Islands National Lakeshore and Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...From Sunday afternoon through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
INSTRUCTION: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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