Weather Alert in Montana
Hydrologic Outlook issued May 7 at 2:39PM MDT by NWS Billings MT
AREAS AFFECTED: Big Horn, MT; Carbon, MT; Golden Valley, MT; Park, MT; Stillwater, MT; Sweet Grass, MT; Wheatland, MT; Yellowstone, MT; Sheridan, WY
DESCRIPTION: ESFBYZ Warm temperatures are forecast through early next week. This is expected to increase snowmelt across area mountains, resulting in a significant increase in flows on area rivers and streams by this weekend. While flooding is not anticipated on larger rivers and streams, there is a chance that some smaller streams and creeks could reach bankfull in and near the foothills, producing minor flooding. At the very least stream flows will be much higher with the increased snowmelt. Water rises will occur first on small streams and creeks flowing out of the foothills, eventually arriving on larger rivers and streams. The rate and strength of the water rises will be determined by how warm temperatures get over the mountains, as well as whether temperatures remain above freezing overnight. Any precipitation will also result in strong and sudden water rises. For those living near waterways, this may be the last chance to finalize preparations for runoff season. Move any livestock and equipment to higher ground away from waterways. Any stream bank stabilization activities should be completed as soon as possible. For those planning recreation activities on or near waterways, be prepared for changing conditions and significantly higher flows. Erosion will also increase as stream flows increase, making streambanks unstable. Please stay well away from streambanks when water is running fast, and be especially vigilant with children. Erosion will undercut the bank and can break off taking the bank and anyone standing on it into a very cold raging current. Stay tuned to the forecast for any watches, advisories, or warnings. Please report any flooding to local law enforcement and have them relay the report to the National Weather Service.
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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