Weather Alert in Idaho
Hydrologic Outlook issued August 25 at 11:47AM MDT by NWS Missoula MT
AREAS AFFECTED: Clearwater, ID; Idaho, ID; Lemhi, ID; Deer Lodge, MT; Granite, MT; Mineral, MT; Missoula, MT; Powell, MT; Ravalli, MT; Silver Bow, MT
DESCRIPTION: ESFMSO Where: Lemhi, Idaho, and Clearwater Counties in Idaho Ravalli, Mineral, Missoula, Granite, Deer Lodge, Powell, and Silverbow Counties in Montana What: Confidence continues to trend higher that Monsoon moisture will be spreading north into the Northern Rockies by Wednesday, bringing a chance for scattered thunderstorms. These thunderstorms will be capable of producing rain rates in excess of one half inch per hour. The result will be the potential for rock and debris slides in steep terrain along Forest Service roads and recent burn scar areas, as well as Highway 93 from Riggins to Whitebird in Idaho and Skalkaho Road in Montana. Consider delaying any backcountry travel for Wednesday and Thursday of this week.
INSTRUCTION: N/A
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Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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
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