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About one-third of the Weather Surveillance Radar-1988 Doppler (WSR-88D) radars located in the western third of the United States are on the tops of mountains. These mountaintop radars employ scanning strategies that were designed for flatland radars, with the lowest elevation angle being +0.5°. Consequently, the radar signals are sent well above the populace and terrain surrounding the radar. The inability to adequately detect low-altitude weather events results in missed warnings of severe weather and in underestimates of the amount and areal extent of precipitation. Mountaintop radars could be utilized much more effectively if the scanning strategies included negative elevation angles. The state of Utah has the disadvantage that all three of the WSR-88Ds used by the National Weather Service to monitor weather events in the state are located on the tops of mountains. To determine the extent to which negative elevation angles would improve the detection capabilities of these radars over Utah and...

Improved Detection Using Negative Elevation Angles for Mountaintop WSR-88Ds. Part II: Simulations of the Three Radars Covering Utah