Weather Alert in Vermont
Air Quality Alert issued August 2 at 4:48PM EDT by NWS Burlington VT
AREAS AFFECTED: Grand Isle; Western Franklin; Orleans; Essex; Western Chittenden; Lamoille; Caledonia; Washington; Eastern Franklin; Eastern Chittenden
DESCRIPTION: The Vermont Agency of Natural Resources has issued an Air Quality Health Advisory for Code Red or Unhealthy for Everyone or greater category due to Fine Particulates for Caledonia, Eastern Chittenden, Eastern Franklin, Essex, Grand Isle, Lamoille, Orleans, Washington, Western Chittenden, and Western Franklin from midnight tonight to midnight EDT Sunday night. The air quality index, or AQI, is expected to approach or exceed the Code Red or Unhealthy for Everyone or greater category due to Fine Particulates. When pollution levels are in the Unhealthy for Everyone or greater category, the Vermont Department of Health recommends that these individuals consider limiting strenuous outdoor physical activity to reduce the risk of adverse health effects. People who may be especially sensitive to the effects of elevated levels of pollutants include the very young, older adults, and those with preexisting respiratory problems such as asthma or heart disease and those working outside. Those with symptoms should consider consulting their personal physician. People with asthma should follow their asthma action plans and keep quick relief medicine handy. If you have 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 healthcare provider. An Air Quality Action Day means that particulate concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Vermont Agency of Natural Resources web site at https://dec.vermont.gov/air-quality/local-air-quality-forecasts.
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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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