Weather Alert in Montana
Winter Weather Advisory issued February 17 at 1:49PM MST until February 19 at 8:00AM MST by NWS Missoula MT
AREAS AFFECTED: West Glacier Region
DESCRIPTION: * WHAT...Snow and cold temperatures. There is a likelihood of ongoing minor winter weather impacts. Additional snow accumulations between 1 and 3 inches. * WHERE...Bad Rock Canyon, Glacier National Park, Marias Pass, Essex, Polebridge, and Highway 83 Bigfork to Swan Lake. * WHEN...Until 8 AM MST Thursday. * IMPACTS...Winter traveling conditions. For MINOR winter weather impacts, expect a few inconveniences to normal activities. MODERATE winter weather impacts, expect disruptions to normal activities.Use caution while driving. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes, especially over higher passes. * ADDITIONAL DETAILS...Northeast winds between 15 and 25 mph with gusts to 35 mph starting Tuesday night will generate bitterly cold wind chill temperatures as cold as 30 below zero. Any exposed skin could become frostbitten within 30 minutes in these conditions. Newborn livestock may be stressed. While northeast winds will lessen somewhat Wednesday night, wind chill temperatures near 20 below zero are possible.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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