Weather Alert in California

Recent Locations: San Bruno, CA   San Marcos, CA   Empire, CA  
Current Alerts for San Marcos, CA: High Surf Advisory Wind Advisory

Winter Weather Advisory issued February 16 at 1:29AM PST until February 18 at 4:00PM PST by NWS Eureka CA

AREAS AFFECTED: Northwestern Mendocino Interior; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County

DESCRIPTION: * WHAT...Heavy snow possible above 2500 feet. Total snow accumulations up to 4 to 8 inches possible. Winds could gust as high as 35 mph. * WHERE...Lake County, and Northern Mendocino Interior. * WHEN...From 10 PM this evening to 4 PM PST Wednesday. * IMPACTS...Travel could be very difficult above 2,500 feet. The hazardous conditions will impact the Tuesday morning and evening commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...There is still quite a bit of uncertainty on how low the snow levels will get. Tuesday morning there may be snow at Lake level in Lake county. Highway 101 may see snow, especially north of Ukiah.

INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

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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.

Next Topic: Precipitation

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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