Weather Alert in Washington
Cold Weather Advisory issued February 18 at 12:27PM PST until February 19 at 10:00AM PST by NWS Seattle WA
AREAS AFFECTED: Port Townsend Area; Eastern Strait of Juan de Fuca; Western Strait of Juan de Fuca; Lake Crescent Area Including US 101; Island County
DESCRIPTION: * WHAT...Very cold wind chills as low as 15 to 20 degrees expected. * WHERE...Eastern Strait of Juan de Fuca, Island County, Lake Crescent Area Including US 101, Port Townsend Area, and Western Strait of Juan de Fuca. * WHEN...From 1 AM to 10 AM PST Thursday. * IMPACTS...Very cold temperatures can lead to hypothermia with prolonged exposure.
INSTRUCTION: Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. For sheltering information and other human services in your area, dial 2 1 1 during business hours or visit wa211.org anytime.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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