Weather Alert in California

Recent Locations: San Francisco, CA  

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 Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail

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