Weather Alert in Washington
Red Flag Warning issued July 16 at 5:42AM PDT until July 16 at 11:00PM PDT by NWS Seattle WA
AREAS AFFECTED: West Slopes of the North Cascades Generally above 1500 Feet; West Slopes of the Central Cascades Generally above 1500 Feet
DESCRIPTION: * AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet and Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * WINDS...Light becoming west 5 to 10 mph. * RELATIVE HUMIDITY...As low as 20 percent. * TEMPERATURES...Up to 95. * IMPACTS...A combination of low relative humidity, unstable airmass, and warm temperatures can contribute to rapid rates of spread and down- wind spotting on existing fires. If a fire were to begin, air quality may diminish in the surrounding area. * STABILITY...Unstable conditions can be expected * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended.
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North America Water Vapor (Moisture)
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Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
Weather Topic: What are Stratus Clouds?
Home - Education - Cloud Types - Stratus Clouds
Next Topic: Wall Clouds
Stratus clouds are similar to altostratus clouds, but form at a
lower altitude and are identified by their fog-like appearance, lacking the
distinguishing features of most clouds.
Stratus clouds are wider than most clouds, and their base has a smooth, uniform
look which is lighter in color than a nimbostratus cloud.
The presence of a stratus cloud indicates the possibility of minor precipitation,
such as drizzle, but heavier precipitation does not typically arrive in the form
of a stratus cloud.
Next Topic: Wall Clouds
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