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Weather Underground Forecast for Saturday, February 28, 2015

A low pressure system will continue to affect the western third of the country on Saturday, while a high pressure system will shift over the Eastern Seaboard.

An area of low pressure will move slowly southward over the Great Basin and the Southwest. This system will tap into moisture from the Pacific Ocean, generating moderate rain over southern California, southern Nevada, Arizona and western New Mexico. Moderate to heavy snow will impact the Sierra Nevada, the Wasatch and the southern Rockies. Winter weather advisories are already in place across the Sierra Nevada range. Conditions are expected to clear up across the Pacific Northwest and the upper Intermountain West on Saturday.

Meanwhile, a high pressure system will shift eastward over the Mid-Atlantic. Temperatures will be 15 to 30 degrees below normal across the Ohio Valley, the Tennessee Valley, the Mid-Atlantic and the Northeast.

Additionally, an onshore flow from the Gulf of Mexico will push a moist air mass across the central third of the country. A mixture of freezing rain and snow will affect portions of Texas, Oklahoma, southern Missouri, southern Illinois, southern Indiana, northern Kentucky and southwest Ohio. Locally heavy snow showers are forecast to develop across eastern Kansas, southeast Nebraska, northern Missouri, southern Iowa, northern Illinois and northwest Indiana. The northern Plains will stay mostly clear of precipitation on Saturday.

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