Weather Alert in California

Recent Locations: San Bruno, CA  

Winter Storm Warning issued February 16 at 4:21AM PST until February 19 at 10:00AM PST by NWS Medford OR

AREAS AFFECTED: Western Siskiyou County

DESCRIPTION: * WHAT...Heavy snow expected above 5000 ft through this morning with accumulations of 4 to 8 inches expected. After a brief lull in precipitation this afternoon, snow levels drop to around 1000-1500 ft tonight into Tuesday, and remain low through Thursday. Additional snow accumulations 6 to 12 inches are expected with 2 to 3 ft expected above 5000 ft. Winds gusting as high as 40 mph over high and exposed terrain. * WHERE...In western Siskiyou County, elevations above 5000 ft through Monday morning, lowering all areas Monday evening. This includes all of Highway 96 and 3, and Etna Summit on Sawyers Bar Rd. This also now includes the Klamath River and Scott Valleys, the communities of Happy Camp, Somes Bar, Etna, Greenview, and Callahan. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Travel may be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The heaviest snow is expected late tonight into Tuesday morning. Visit weather.gov/mfr/winter for snow probabilities.

INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit quickmap.dot.ca.gov for road information.

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Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

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Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

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