Weather Alert in Minnesota
Air Quality Alert issued May 31 at 10:44AM CDT by NWS Duluth MN
AREAS AFFECTED: North St. Louis; Northern Cook/Northern Lake; Central St. Louis; Southern Lake/North Shore; Southern Cook/North Shore; Carlton/South St. Louis
DESCRIPTION: MNZ011-012-019>021-037-022300- Carlton/South St. Louis-Central St. Louis-North St. Louis-Northern Cook/Northern Lake-Southern Cook/North Shore-Southern Lake/North Shore- Including the tribal nations of Fond du Lac and Grand Portage Including the cities of Duluth, Ely, Hibbing, and Two Harbors ...AIR QUALITY ALERT NOW IN EFFECT FROM NOON CDT SUNDAY TO 6 PM CDT MONDAY... * WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Red or Unhealthy category. * WHERE...Northeastern Minnesota including Cook, Lake, St. Louis, and Carlton Counties. * WHEN...From Noon CDT Sunday until 6 PM CDT Monday. * IMPACTS...Some members of the general public may experience health effects. Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, may experience health effects. * ADDITIONAL DETAILS...Smoke that was lingering over northeastern Minnesota has cleared. The air quality in the Arrowhead will remain in the Yellow (Moderate) category, which is below air quality alert criteria on Saturday. However more smoke is expected Sunday afternoon and will linger into Monday. People should consider moving outdoor activities to Saturday and plan on limiting outdoor exertion Sunday and Monday. Additional smoke events are possible into next week, and this alert may need to be extended.
INSTRUCTION: Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid prolonged or heavy exertion. The general public should limit prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.
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Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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