Weather Alert in Washington
Air Quality Alert issued September 1 at 10:59AM PDT by NWS Spokane WA
AREAS AFFECTED: Stevens, WA
DESCRIPTION: An Air Quality Alert has been issued by the following agencies: Washington Department of Ecology An Air Quality Alert has been issued for Stevens County until further notice due to current wildfire smoke from the Crown Creek fire, Katy Creek fire, and Blackhawk Mountain Fire. Particulate matter (PM2.5) levels are Unhealthy for Sensitive Groups. When air quality is Unhealthy for Sensitive Groups, residents should take steps to reduce exposure. Limit time outside, avoid strenuous activity, and follow tips for cleaner air. Everyone should watch for symptoms as a sign to reduce exposure.
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Weather Topic: What is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
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
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