Development of Multiple Moving Nests Within a Basin-Wide HWRF Modeling
Jun Zhang (UM/CIMAS)
Da-Lin Zhang (University of Maryland)
Qingfu Liu, Samuel Trahan, Zhan Zhang, and Vijay Tallapragada (NCEP/EMC)
Funding Period: 1 January 2012-31 December 2014
In this proposal, we propose a practical solution to target 7-day hurricane forecasts in the Atlantic basin with a high resolution modeling system: the multiple moving nests within a basin-wide hurricane WRF modeling system. Our objective is to develop a forecast system which can follow multiple storms with each storm having multiple nest levels to meet the required high- resolution and domain coverage to resolve the evolution of large-scale systems, the hurricane related mesoscale convective features, and multi-scale interactions.
An experimental HWRF basin-wide system has been developed in AOML/HRD and UM/CIMAS. The system is currently configured with a static domain spanning both hurricane basins: the Atlantic basin and the East Pacific basin, in which hurricanes can directly impact the US and its territories. The system is capable of following multiple storms and enhancing interested hurricane affected regions by imposing multiple movable nests. It was under intensive testing for the past two years (2011-2012 hurricane seasons) and performed real-time experimental forecasts for 2013 hurricane season under the guidance of HFIP. We have further advanced it toward operational implementation by implementing multiple nest initialization, code speed-up, and forecast automation.
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