Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >

Las Vegas Valley & Forecast Office

Forecast Area

Las Vegas Valley

Las Vegas is located in a broad desert valley in extreme southern Nevada. Mountains surrounding the valley extend 2,000 to 10,000 feet above the valley floor. The Las Vegas Valley comprises about 600 square miles and runs from northwest to southeast. The valley is bounded on the north by the Sheep Range, while Boulder City and the Lake Mead National Recreation Area are generally considered its southern extent. To the west are the Spring Mountains, which include Mt. Charleston, the region’s highest peak at 11,918 feet. Several smaller ranges line the eastern rim of the valley, including the McCullough Range, the Muddy Mountains, the Black Mountains, and the Eldorado Range.

National Weather Service in Las Vegas

Official weather observations began in 1937 at what is now Nellis Air Force Base. In late 1948, the U.S. Weather Bureau moved to McCarran Field, now Harry Reid International Airport. Harry Reid is located 7 miles south of downtown Las Vegas. It is approximately 5 miles southwest of, and 300 feet higher than the lowest part of the valley. Thus, for most of the Las Vegas metropolitan area, the valley floor slopes downward from west to east. This affects the local climatology significantly in terms of driving variations in wind, precipitation, and storm runoff. To read about the history of the Las Vegas Weather Office, click here.

National Weather Service Office Building

The office is located on 9.5 acres of desert terrain, is bordered on two sides by homes and one side by a strip mall. Open land to the south, immediately gives way to one of the area's casinos less than .5 miles away. The WSR-88D is located roughly 35 air miles to the southeast of the NWSO and is located at roughly 5,000 ft on top of Nelson Peak.

NWS Las Vegas services the largest population center in the state and provides weather services for one of the largest County Warning Areas (CWA) within the contiguous United States (approximately 70,000 square miles). The CWA covers parts of Nevada, California, and Arizona. The Las Vegas CWA has had the fastest growing population of any since 1990. Weather forecasting is a challenge with the lowest and highest points in the contiguous United States being in or on our CWA border. A diversified program entails watch/warning responsibility, public and aviation forecasts, public service, an extensive ALERT rain gauge network, NOAA Weather Radio, cooperative stations, and climate.

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Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

About NWS Las Vegas