Weather Alert in Minnesota
Extreme Heat Warning issued June 19 at 2:45PM CDT until June 22 at 9:00PM CDT by NWS Twin Cities/Chanhassen MN
AREAS AFFECTED: Mille Lacs; Kanabec; Pope; Stearns; Benton; Sherburne; Isanti; Chisago; Wright; Hennepin; Anoka; Ramsey; Washington; Carver; Scott; Dakota; Rice; Goodhue; Steele; Polk; St. Croix; Pierce
DESCRIPTION: * WHAT...Dangerously hot conditions with heat index values of 105 to 110 expected. Low temperatures Saturday night will remain in the mid 70s to lower 80s, providing little relief from the heat. * WHERE...Portions of central, east central, south central, southeast, and west central Minnesota and northwest and west central Wisconsin. * WHEN...From noon Saturday to 9 PM CDT Sunday. * 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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