The atmospheric forcing will be provided by a nested COAMPS configuration in which a higher resolution grid of 9-km is stationed over coastal Mississippi and Louisiana. The simulations are performed out to 48 hours in "cold-start" mode, in which NOGAPS provides the initialization and boundary conditions.
The effectiveness of the 9-km wind fields was evaluated using FNMOC's 27-km COAMPS runs as a baseline. The period of the study was December 12-December 20 when the NGLI region experienced many vigorous frontal passages. A qualitative analysis showed an overall improvement of the wind field (both wind speed and direction) in the vicinity of bays and along the coastline, particularly during windy events. A quantitative analysis using CMAN, buoy, and METAR data confirmed that the 9-km runs showed improvements in terms of in terms of skill score based on absolute errors for wind speed and direction. An attempts to reveal a systematic component of the 10-m wind errors and associate them with surface physical properties of both models will be undertaken. These results, as well as a general discussion of NGLI, will be presented at the conference.