Weather Alert in Wisconsin
Air Quality Alert issued August 11 at 8:33AM CDT by NWS Twin Cities/Chanhassen MN
AREAS AFFECTED: Polk; Barron; Rusk; St. Croix; Pierce; Dunn; Pepin; Chippewa; Eau Claire
DESCRIPTION: The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Chippewa, Clark, Door, Douglas, Dunn, Eau Claire, Florence, Forest, Iron, Jackson, Juneau, Kewaunee, La Crosse, Langlade, Lincoln, Marathon, Marinette, Menominee, Monroe, Oconto, Oneida, Outagamie, Pepin, Pierce, Polk, Portage, Price, Rusk, Sawyer, Shawano, St. Croix, Taylor, Trempealeau, Vernon, Vilas, Washburn, Waupaca, Waushara, Wood. WHAT...The PM2.5 AQI is expected to reach the Unhealthy for Sensitive Groups (Orange) to Unhealthy (Red) level. WHERE...Northern Wisconsin and west-central Wisconsin. WHEN...From 10 AM Monday until 3 PM Tuesday. Precautionary/Preparedness Actions: Sensitive groups: Make outdoor activities shorter and less intense. It is OK to be active outdoors but take more breaks. Watch for symptoms such as coughing or shortness of breath. People with asthma: Follow your asthma action plan and keep quick relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Additional Details: Canadian wildfire smoke will impact surface air quality as it moves ENE across northern portions of the state later Monday morning through early Tuesday afternoon. The heaviest smoke impacts are expected in far northwest Wisconsin, where PM2.5 NowCast AQI values of Unhealthy (Red) will be possible. Lesser impacts in the Moderate (Yellow) to Unhealthy for Sensitive Groups (Orange) AQI range are expected further south and east in the advisory area. A cold front moving in from the northwest on Tuesday morning will begin to clear this initial round of smoke from northwest to southeast. Although more smoke could move in behind the front, we do not expect advisory criteria to be met with the second round of smoke at this time. For more information on current air quality, please see: https://airquality.wi.gov
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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
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
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