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A. B. White, M. L. Anderson, M. D. Dettinger, F. M. Ralph, A. Hinojosa, D. R. Cayan, R. K. Hartman, D. W. Reynolds, L. E. Johnson, T. L. Schneider, R. Cifelli, Z. Toth, S. I. Gutman, C. W. King, F. Gehrke, P. E. Johnston, C. Walls, D. Mann, D. J. Gottas, and T. Coleman

Forecasting (WRF) model ( Skamarock and Klemp 2008 ). The configuration employed for the HMT-Legacy project uses the Advanced Research WRF (ARW) dynamic core. An eight-member ensemble covering North America (beginning in 2013) is run at 9-km grid spacing with 35 vertical levels. A variety of initial and boundary conditions, as well as physical parameterizations, are used to differentiate the ensemble members. Initial conditions are provided by blending the Global Forecast System (GFS) with local

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Qing Yang, Larry K. Berg, Mikhail Pekour, Jerome D. Fast, Rob K. Newsom, Mark Stoelinga, and Catherine Finley

the instrumentation. Easting and northing coordinates reference the 1983 North American Datum, universal transverse Mercator zone 11N. The contours labels indicate terrain height (m). The box indicates the inner nested modeling domain. The RWP provided measurements from 146 to 1462 m in height and was configured to use only its low-power setting to apply a range-gate spacing of 57 m. Because of the potential of ground clutter from the radio tower, the RWP was operated in three-beam mode with the

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Mikael Sjöholm, Nikolas Angelou, Per Hansen, Kasper Hjorth Hansen, Torben Mikkelsen, Steinar Haga, Jon Arne Silgjerd, and Neil Starsmore

, and shading), in a horizontal plane close to ground achieved by combining the line-of-sight wind velocities measured by the two WindScanners. It can clearly be seen in Fig. 4 that the flow emanates from a location slightly above and to the right of the center of the plot, where the helicopter was located within about a meter according to the pilot. The x axis in Fig. 4 is approximately pointing toward west-northwest in the direction of 285° from the north and the average ambient wind was

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