Weather Alert in Oregon
Winter Weather Advisory issued March 3 at 2:44AM PST until March 4 at 10:00PM PST by NWS Medford OR
AREAS AFFECTED: South Central Oregon Cascades
DESCRIPTION: * WHAT...Snow expected above 5000 feet. Total snow accumulations 7 to 10 inches. Winds gusting as high as 40 mph over high and exposed terrain. * WHERE...South Central Oregon Cascades, including Diamond Lake and Crater Lake National Park impacting highways 138, 230 and 62. * WHEN...From 4 AM to 10 PM PST Wednesday. * IMPACTS...Plan on slippery road conditions and delays in your commute. The hazardous conditions could impact the Wednesday morning and evening commutes. * ADDITIONAL DETAILS...Probability of snow accumulation between 4 AM Wednesday to 4 AM Thursday. Probabilities don't always overlap the hazard's time range. Location >= >= >= >= 4in 6in 8in 12in -------- ---- ---- ---- ---- Crater 100% 94% 71% 36% Lake Visit weather.gov/mfr/winter for additional snow probabilities
INSTRUCTION: Slow down and use caution while traveling. Call 511 or visit tripcheck.com for road information.
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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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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