The asymmetric wind field of Nate contains an estimated 21 Terajoules (TJ) of integrated kinetic energy. In terms of storm size, Nate is not an overly large storm. The wind field contours begin at 30 mph and increment in 5 mph bands until 110 mph Figure 2: Plot of 1-minute sustained wind fields comparing Nate to other storms from the 2017 hurricane season using our HWind snapshot products. Given the current forecast guidance, this suggests Biloxi, Gulfport, and Mobile will likely face stronger winds than will New Orleans or Baton Rouge. As a result, the worst hazards from this system should be expected to the east of where the storm makes landfall, especially since these stronger winds will be coming in an onshore direction. Ultimately, as shown in the HWind snapshot image, all of Nate’s hurricane force winds, and the vast majority of its tropical storm force winds are located to the right of center. On the right side of the storm, the winds from Nate’s counterclockwise circulation are moving in approximately the same direction as the storm’s translational speed, whereas on the left side, Nate’s quick forward motion is opposing the storm’s circulation. The storm is moving quite quickly, and as a result the right side of the storm is much stronger than the left side. It is immediately apparent from the HWind snapshot that Nate is a highly asymmetric storm. Figure 1: Hurricane Nate RMS HWind Snapshot – 1 minute maximum sustained winds Sat 7 Oct 18:00 UTC Air Force Reserve Hurricane Hunters in addition to some surface and satellite-based observations. This surface wind analysis is based upon data collected from the National Oceanic and Atmospheric Administration and U.S. The hurricane has become significantly better organized in the last several hours, and now has maximum sustained winds in excess of 90 miles per hour (144 kilometers per hour) based on the RMS HWind snapshot at 18:00 UTC today. Hurricane Nate continues to race towards the central Gulf Coast today. Michael Kozar, senior modeler – Model Development, RMS
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