Weather Alert in Washington
Winter Weather Advisory issued February 22 at 1:40PM PST until February 23 at 1:00PM PST by NWS Spokane WA
AREAS AFFECTED: Western Chelan County
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 2 and 8 inches, including a 40 to 60% chance of 1 inch per hour snowfall rates. * WHERE...Holden Village, Stehekin, and Stevens Pass. * WHEN...From 10 PM this evening to 1 PM PST Monday. * IMPACTS...Winter travel conditions expected, including the Monday morning commute. * ADDITIONAL DETAILS...The highest probabilities for snowfall rates of 1"/hour will be from 2AM and 9AM Monday.
INSTRUCTION: Slow down and use caution while traveling. For the latest travel information in Washington, go to https://wsdot.wa.gov/travel
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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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