Evaluation of the surface wind field over land in WRF simulations of Hurricane Wilma (2005). Part II: Surface winds, inflow angles, and boundary layer profiles

David S. Nolan, Brian D. Mcnoldy, Jimmy Yunge, Forrest J. Masters, Ian M. Giammanco

Research output: Contribution to journalReview articlepeer-review

3 Scopus citations

Abstract

This is the second of a two-part study that explores the capabilities of a mesoscale atmospheric model to reproduce the near-surface wind fields in hurricanes over land. The Weather Research and Forecasting (WRF) Model is used with two planetary boundary layer parameterizations: The Yonsei University (YSU) and the Mellor-Yamada-Janjić (MYJ) schemes. The first part presented the modeling framework and initial conditions used to produce simulations of Hurricane Wilma (2005) that closely reproduced the track, intensity, and size of its wind field as it passed over South Florida. This part explores how well these simulations can reproduce the winds at fixed points over land by making comparisons with observations from airports and research weather stations. The results show that peak wind speeds are remarkably well reproduced at several locations. Wind directions are evaluated in terms of the inflow angle relative to the storm center, and the simulated inflow angles are generally smaller than observed. Localized peak wind events are associated with vertical vorticity maxima in the boundary layer with horizontal scales of 5-10 km. The boundary layer winds are compared with wind profiles obtained by velocity-azimuth display (VAD) analyses from National Weather Service Doppler radars at Miami and Key West, Florida; results from these comparisons are mixed. Nonetheless the comparisons with surface observations suggest that when short-term hurricane forecasts can sufficiently predict storm track, intensity, and size, they will also be able to provide useful information on extreme winds at locations of interest.

Original languageEnglish (US)
Pages (from-to)697-713
Number of pages17
JournalMonthly Weather Review
Volume149
Issue number3
DOIs
StatePublished - Feb 2021
Externally publishedYes

Keywords

  • Boundary layer
  • Hurricanes/typhoons
  • Mesoscale models
  • Model evaluation/performance

ASJC Scopus subject areas

  • Atmospheric Science

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