Weather Alert in Montana
Winter Weather Advisory issued February 8 at 12:34AM MST until February 9 at 11:00AM MST by NWS Great Falls MT
AREAS AFFECTED: Gallatin and Madison County Mountains and Centennial Mountains
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations 2 to 5 inches. Isolated snowfall accumulations near 10 inches at ridge tops. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 5 PM this afternoon to 11 AM MST Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.
INSTRUCTION: To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for Newborn Livestock.
Want more detail? Get the Complete 7 Day and Night Detailed Forecast!
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North America Water Vapor (Moisture)
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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
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