Weather Alert in Montana
Air Quality Alert issued September 6 at 8:39AM MDT by NWS Great Falls MT
AREAS AFFECTED: Beaverhead, MT; Deer Lodge, MT; Granite, MT; Lincoln, MT; Mineral, MT; Ravalli, MT; Sanders, MT
DESCRIPTION: AQAMT The Montana Department of Environmental Quality has issued an air quality alert for Beaverhead, Deer Lodge, Granite, Lincoln, Mineral, Ravalli, Sanders counties in effect until 9AM on 09/07/2025 An Air Quality Alert means that particulates have been trending upwards and that an exceedance of the 24 hour National Ambient Air Quality Standard (NAAQS) has occurred or may occur in the near future. An Air Quality Alert means that particulates have been trending upwards and that an exceedence of the 24 hour National Ambient Air Quality Standard (NAAQS) has occurred or may occur in the near future. As of 7AM on 09/06/2025, particulate levels in Hamilton and Libby are Unhealthy for Sensitive Groups. As of 7AM on 09/06/2025, particulate levels in Billings, Butte, Columbia Falls, Dillon, Frenchtown, Helena, Lewistown, Missoula, Seeley Lake, Thompson Falls and West Yellowstone are Moderate. When air quality is Unhealthy...State and local health officials recommend that people with respiratory or heart disease...the elderly...and children should avoid prolonged exertion; everyone else should limit prolonged exertion. For more information visit the Montana Department of Environmental Quality at www.todaysair.mt.gov
INSTRUCTION: N/A
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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
Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds
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