Weather Alert in Maine
Air Quality Alert issued July 16 at 9:51AM EDT by NWS Caribou ME
AREAS AFFECTED: Northwest Aroostook; Northeast Aroostook; Northern Somerset; Northern Piscataquis; Northern Penobscot; Southeast Aroostook; Central Piscataquis; Central Penobscot; Southern Piscataquis; Northern Washington
DESCRIPTION: The Maine Department of Environmental Protection's Bureau of Air Quality has issued an Air Quality Alert for particle pollution until midnight EDT tonight. Particle pollution levels are expected to rise into the Unhealthy for Sensitive Groups range on Tuesday. Values are already in the USG range this morning. Smoke is currently expected to not move out of Maine until Thursday, though this denser portion of the plume should move out by Wednesday evening. In addition, particle pollution levels are expected to be moderate for the remainder of the state while ozone level are expected in the moderate range for the Maine coastal regions. The Maine Department of Environmental Protection recommends that 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, the elderly, those with pre-existing respiratory problems such as asthma, those with heart disease and anyone who is working hard outdoors. But if you experience symptoms such as shortness of breath, coughing, throat irritation or an uncomfortable sensation in your chest please consider limiting the intensity and duration of your outdoor activities. A toll free air quality hotline has been established so Maine residents can stay informed on the air quality situations. The toll free number is: 1-800-223-1196. Additionally the Maine Department of Environmental Protection has the air quality forecast available on the web at www.maine.gov/dep/air/aqforecast.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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