Weather Alert in Oregon
Winter Storm Warning issued April 1 at 12:12AM PDT until April 2 at 5:00PM PDT by NWS Medford OR
AREAS AFFECTED: Eastern Douglas County Foothills; South Central Oregon Cascades; Siskiyou Mountains and Southern Oregon Cascades
DESCRIPTION: * WHAT...Heavy snow expected. Total snow accumulations 12 to 24 inches, with 24 to 30 inches in Crater Lake National Park. Winds gusting as high as 50 mph over high and exposed terrain. * WHERE...The southern Oregon Cascades north of Howard Prairie Lake, and the eastern Douglas County Foothills above 3000 ft, including the passes along highways 140, 62, 138, 230, and 58. * WHEN...From 5 AM Wednesday to 5 PM PDT Thursday. * IMPACTS...Travel may be very difficult to impossible. The hazardous conditions could impact the Wednesday morning and evening commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...The heaviest snow is expected Wednesday afternoon when 1 inch per hour rates are a near certainty, and there is a 60 to 80% chance of 2 inch per hour snowfall rates for a couple of hours during the main frontal passage.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit tripcheck.com for road information.
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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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