Weather Alert in Alaska
Winter Weather Advisory issued September 11 at 2:02PM AKDT until September 13 at 7:00AM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Northern Denali Borough; Southern Denali Borough
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations up to 2 to 4 inches. * WHERE...Denali Borough. * WHEN...From 10 PM this evening to 7 AM AKDT Saturday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Friday morning and evening commutes. * ADDITIONAL DETAILS...Snow will struggle to accumulate during the day, as it will melt on contact initially. Most accumulations will come tonight and Friday night. There is the potential for a refreeze of snowmelt Friday night and Saturday night.
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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North America Water Vapor (Moisture)
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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
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
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