Weather Alert in Washington
Heat Advisory issued June 6 at 1:30PM PDT until June 10 at 9:00PM PDT by NWS Spokane WA
AREAS AFFECTED: Okanogan Valley; Waterville Plateau; Central Chelan County; Western Chelan County; Western Okanogan County
DESCRIPTION: * WHAT...High temperatures between 91 and 101 degrees. * WHERE...Leavenworth, Tonasket, Oroville, Waterville, Omak, Bridgeport, Stevens Pass, Twisp, Brewster, Winthrop, Conconully, Methow, Plain, Nespelem, Disautel Pass, Holden Village, Stehekin, Okanogan, Mazama, and Mansfield. * WHEN...From noon Sunday to 9 PM PDT Tuesday. * IMPACTS...Increased risk of heat-related illnesses. * ADDITIONAL DETAILS...Low temperatures in the 60s will provide little relief at night. Be mindful that lakes, rivers, and streams are still cold.
INSTRUCTION: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
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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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