Weather Alert in Washington
Fire Weather Watch issued July 28 at 12:33PM PDT until July 30 at 9:00PM PDT by NWS Spokane WA
AREAS AFFECTED: East Washington Central Cascades
DESCRIPTION: ...HOT, DRY, AND UNSTABLE CONDITIONS WITH ISOLATED DRY THUNDERSTORMS WEDNESDAY AFTERNOON AND EVENING... The National Weather Service in Spokane has issued a Fire Weather Watch for hot, dry, and unstable conditions with isolated dry thunderstorms, which is in effect from Wednesday afternoon through Wednesday evening. * Affected Area: East Washington Central Cascades (Zone 696). * Timing: Wednesday afternoon and evening. * Relative Humidities: Min RH 20 to 30 percent. * Temperatures: 80-90 degrees. * Lightning: Isolated dry thunderstorms. * Outflow Winds: Gusty and erratic winds are possible with any thunderstorms that develop. The outflow winds could travel quite a distance from the core of the storm. * Impacts: Hot, dry, and unstable conditions Wednesday afternoon and evening may lead to rapid fire growth on any new or existing fires. Isolated dry thunderstorms will lead to the potential for new fire starts. Gusty winds with thunderstorms may result in rapid fire spread with any new or existing fires.
INSTRUCTION: A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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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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