Weather Alert in Washington
Air Quality Alert issued August 13 at 9:32AM PDT by NWS Seattle WA
AREAS AFFECTED: Mason, WA
DESCRIPTION: An Air Quality Alert has been issued by the Olympic Region Clean Air Agency. An Air Quality Alert has been issued for Mason County, effective until 9 AM PDT Friday August 15 due to the current wildfire smoke from the Bear Gulch Fire. Particulate matter (PM 2.5) levels may reach very unhealthy or hazardous in areas closest to the fire. Health impacts and recommended actions: When air quality is very unhealthy or hazardous, everyone should reduce exposure. Stay inside and filter indoor air to keep it cleaner. Go elsewhere for cleaner air, if needed. Burning restrictions are in effect. For current air quality conditions and additional information visit www.orcaa.org
INSTRUCTION: N/A
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Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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