Weather Alert in Oregon
Winter Weather Advisory issued March 3 at 8:57PM PST until March 5 at 4:00AM PST by NWS Portland OR
AREAS AFFECTED: Cascades of Marion and Linn Counties; Cascades of Lane County
DESCRIPTION: * WHAT...Wet snow expected. Total snow accumulations of 6 to 11 inches. Highest accumulations within Willamette Pass and the Lane County Cascades. * WHERE...Cascades of Lane County and Cascades of Marion and Linn Counties. * WHEN...From 4 AM Wednesday to 4 AM PST Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...Snow will transition to a showery pattern in the afternoon which will lead to less uniform accumulation. There is a 50-60% chance of more than 12 inches of snow during this time frame within Willamette Pass, and a 30% chance within Santiam Pass. Highest snowfall rates may occur between 4 AM to 4 PM Wednesday.
INSTRUCTION: Have a winter emergency driving kit readily available. Common items to include: flashlight, batteries, blankets, a shovel, water, non-perishable food items, tire chains, etc. Be aware that walking surfaces may be slick. Walk with extra care. For the latest road conditions and chain restrictions in Oregon, call 5 1 1, or visit: www.tripcheck.com. For the latest road conditions and chain restrictions in Washington, visit: wsdot.com/travel/real-time/map
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Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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