Weather Alert in Colorado

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Winter Weather Advisory issued February 11 at 2:33PM MST until February 12 at 11:00AM MST by NWS Denver CO

AREAS AFFECTED: South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet

DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 4 and 11 inches, with greater amounts up to 16 inches at higher elevations. * WHERE...The northern Front Range mountains, including Rocky Mountain National Park and the Medicine Bow Range. * WHEN...Until 11 AM MST Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the Wednesday evening and Thursday morning commutes.

INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org.

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Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

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

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

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

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