Weather Alert in Minnesota
Air Quality Alert issued August 1 at 3:08PM CDT by NWS Aberdeen SD
AREAS AFFECTED: Traverse; Big Stone
DESCRIPTION: * 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...West central, east central, central, south central, southwest, southeast, north central, northwest, and northeast Minnesota. * WHEN...Until noon 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...Surface high pressure will camp out over the region through Friday evening and will result in light winds and poor dispersion. Smoke with widespread red/unhealthy air quality index (AQI) concentrations will likely remain over most of the state through tonight and into the day Saturday. Winds will increase out of the south over the weekend as high pressure drifts east of the area. Smoke concentrations should gradually decline starting Saturday, but the clearing of the smoke may be slow with smoke spreading as far south as Tennessee and Missouri. Orange AQIs (unhealthy for sensitive groups) could hang on through Sunday and into the day Monday. Most of the alert-level smoke should push north back into Canada by later Monday.
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 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
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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