Weather Alert in California
Winter Weather Advisory issued April 1 at 3:27AM PDT until April 1 at 5:00PM PDT by NWS Medford OR
AREAS AFFECTED: Modoc County; South Central Oregon Cascades; Siskiyou Mountains and Southern Oregon Cascades; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County
DESCRIPTION: * WHAT...Snow. Additional snow accumulations of up to 4 inches. * WHERE...The southern Oregon Cascades and Siskiyou Mountains. This includes Highways 230 and 138 near Diamond Lake, Highway 62 south of Crater Lake, and Highway 140. Additionally, areas around Mount Ashland are included. Portions of Klamath, Lake, and Modoc counties, including Lakeview, Chemult, Chiloquin, Valley Falls, Modoc Point, Davis Creek, the highway 97 corridor between Klamath Falls and Crescent, highway 140 east of Bly, highway 395 between Alturas and Alkali Lake, and highway 139 between Adin and Canby. * WHEN...Until 5 PM PDT this afternoon. * IMPACTS...Plan on slippery road conditions. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr
INSTRUCTION: * Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com or https://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties.
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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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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