Weather Alert in Montana
Flood Watch issued April 28 at 2:36AM MDT until April 29 at 12:00AM MDT by NWS Billings MT
AREAS AFFECTED: Southern Big Horn; Bighorn Canyon; Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains; Sheridan Foothills
DESCRIPTION: * WHAT...Flooding caused by rain and snowmelt continues to be possible, but the threat of higher end impacts has decreased. * WHERE...Portions of south central Montana, including the following areas, Bighorn Canyon, Pryor/Northern Bighorn Mountains and Southern Big Horn and north central Wyoming, including the following areas, Northeast Bighorn Mountains and Sheridan Foothills. * WHEN...Through this evening. * IMPACTS...Excessive runoff may result in flooding of streams and other low-lying and flood-prone locations close to the foothills. Some higher foothills roads may become impassable. Any heavy rainfall over the Elk burn area could result in Flash Flooding and Debris Flows. * ADDITIONAL DETAILS... - Heavy rainfall fell just off the snowpack last evening with half an inch to an inch of precipitation reported along the I-90 corridor. Temperatures are beginning to cool over the higher terrain turning rain to snow over the higher foothills. This will limit the higher end impact potential that was previously anticipated. However, there remains the threat of at least minor flooding in the foothills due to heavy rain that fell earlier tonight combined with continued light to moderate rainfall that is forecast through this morning. - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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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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