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Ligia R. Bernardet authored and/or contributed to the following articles/publications.
Characterizing differences in model output induced by changes in high performance computing platform
Hurricane Weather Research and Forecasting (HWRF) Model: 2011 Scientific Documentation
Institution Developmental Testbed Center
WRF forecasts over the Southeast United States: Does a larger domain lead to better results?
WRF Forecasts of Recent Significant Weather Events: A Comparison of ARM and NMM Cores
THE WRF PROCESS: STREAMLINING THE TRANSITION OF NEW SCIENCE FROM RESEARCH INTO OPERATIONS
Verification of High-Resolution Precipitation Forecasts for the Atlanta Olympic Games
The Local Analysis and Prediction System (LAPS) was an integral part of the Olympic Weather Support System (OWSS) designed by the National Weather Service (NWS) to supplement the forecasting operations in the Peachtree City, GA, NWS forecasting office during the 1996 Atlanta Olympic Games. This paper presents an objective hourly verification of ...
Simulating convective events using a high-resolution mesoscale model
Four multiscale numerical simulations of convective events are analyzed to determine the essential characteristics of a numerical model which lead to useful simulations of convective events. Although several universities and weather forecasting centers are currently running high-resolution forecast models, the predictability of convective event...
Verification of high-resolution precipitation forecasts for the 1996 Atlanta olympic games
The 12-13 May 1985 derecho event: mechanism of strong wind development
A Multi-Scale Modeling System for Improved Hurricane Prediction
In order for NWP models to forecast tropical cyclone structure, size and intensity changes with fidelity, the inner core structure of these storms must be resolved at 1-3 km horizontal grid spacing. Currently, the NWS relies on both coarse-scale global models and regional scale higher resolution models to provide numerical guidance for tropical ...
Impact of the Hydrometeor Vertical Advection Method on HWRF’s Simulated Hurricane Structure
The impact of different hydrometeor advection schemes on TC structure and intensity forecasts is examined through the evaluation of HWRF’s simulation of tropical cyclones using the operational Ferrier–Aligo (FA) microphysics that uses total condensate advection versus the same scheme but with separate hydrometeor advection (FA-adv). Results show...
Institutions National Center for Atmospheric Research - NCAR National Oceanic and Atmospheric Administration - NOAA
The Developmental Testbed Center (DTC) tested two convective parameterization schemes in the Hurricane Weather Research and Forecasting (HWRF) Model and compared them in terms of performance of forecasting tropical cyclones (TCs). Several TC forecasts were conducted with the scale-aware Simplified Arakawa Schubert (SAS) and Grell–Freitas (GF) co...
Institutions National Center for Atmospheric Research - NCAR National Oceanic and Atmospheric Administration - NOAA
Vortex Initialization in the NCEP Operational Hurricane Models
This paper describes the vortex initialization (VI) currently used in NCEP operational hurricane models (HWRF and HMON, and possibly HAFS in the future). The VI corrects the background fields for hurricane models: it consists of vortex relocation, and size and intensity corrections. The VI creates an improved background field for the data assimi...
Institution National Oceanic and Atmospheric Administration - NOAA
NOAA/NCEP runs a number of numerical weather prediction (NWP) modeling suites to provide operational guidance to the National Weather Service field offices and service centers. A sophisticated infrastructure, which includes a complex set of software tools, is required to facilitate running these NWP suites. This infrastructure needs to be mainta...
Community HWRF Users' Guide v3.5a August 2013
The Weather Research and Forecast (WRF) system for hurricane prediction (HWRF) is an operational model implemented at the National Centers for Environmental Prediction (NCEP) of the National Weather Service (NWS) to provide numerical guidance to the National Hurricane Center for the forecasting of tropical cyclones' track, intensity, and structu...
Institutions National Center for Atmospheric Research - NCAR National Oceanic and Atmospheric Administration - NOAA
Hurricane Weather Researchand Forecasting (HWRF) Model:2015 Scientific Documentation
This document describes the scientific aspects of the Hurricane Weather Research and Forecasting (HWRF) modeling system. This is based on 2015 HWRF v3.7a public release. This technical note along with the HWRF v3.7a Users Guide provides the user with the scientific description and running instructions for HWRF.
Institution National Center for Atmospheric Research - NCAR
Community HWRF Users Guide V3.5A
The Weather Research and Forecast (WRF) system for hurricane prediction (HWRF) is an operational model implemented at the National Centers for Environmental Prediction (NCEP) of the National Weather Service (NWS) to provide numerical guidance to the National Hurricane Center for the forecasting of tropical cyclones’ track, intensity, and structu...
Institution National Center for Atmospheric Research - NCAR
Community HWRF Users Guide v3.8a - The Developmental Testbed Center
The Weather Research and Forecast (WRF) system for hurricane prediction (HWRF) is an op-erational model implemented at the National Centers for Environmental Prediction (NCEP)of the National Weather Service (NWS) to provide numerical guidance to the National Hur-ricane Center for the forecasting of tropical cyclones’ track, intensity, and struct...
Institution National Center for Atmospheric Research - NCAR
Community HWRF Users’ Guide V3.6a - The Developmental Testbed Center
The Weather Research and Forecast (WRF) system for hurricane prediction (HWRF) is an op-erational model implemented at the National Centers for Environmental Prediction (NCEP)of the National Weather Service (NWS) to provide numerical guidance to the National Hur-ricane Center for the forecasting of tropical cyclones’ track, intensity, and struct...
Community HWRF Users’ Guide v3.7a
The Weather Research and Forecast (WRF) system for hurricane prediction (HWRF) is an op-erational model implemented at the National Centers for Environmental Prediction (NCEP)of the National Weather Service (NWS) to provide numerical guidance to the National Hur-ricane Center for the forecasting of tropical cyclones’ track, intensity, and struct...
Institution National Center for Atmospheric Research - NCAR
The Hurricane Weather Research and Forecasting Model (HWRF) is an operational model used to provide numerical guidance in support of tropical cyclone forecasting at the National Hurricane Center. HWRF is a complex multicomponent system, consisting of the Weather Research and Forecasting (WRF) atmospheric model coupled to the Princeton Ocean Mode...
Institutions National Center for Atmospheric Research - NCAR National Oceanic and Atmospheric Administration - NOAA
The Princeton Ocean Model for Tropical Cyclones (POM-TC), a version of the three-dimensional primitive equation numerical ocean model known as the Princeton Ocean Model, was the ocean component of NOAA’s operational Hurricane Weather Research and Forecast Model (HWRF) from 2007 to 2013. The coupled HWRF–POM-TC system facilitates accurate tropica...
Institution National Oceanic and Atmospheric Administration - NOAA
Sensitivity of hurricane forecasts to cumulus parameterizations in the HWRF model
The Developmental Testbed Center used the Hurricane Weather Research and Forecasting (HWRF) system to test the sensitivity of tropical cyclone track and intensity forecasts to different convective schemes. A control configuration that employed the HWRF Simplified Arakawa Scheme (SAS) was compared with the Kain-Fritsch and Tiedtke schemes, as wel...
Institution National Center for Atmospheric Research - NCAR
Community HWRF Users’ Guide V3.5a
The Weather Research and Forecast (WRF) system for hurricane prediction (HWRF) is an operational model implemented at the National Centers for Environmental Prediction (NCEP) of the National Weather Service (NWS) to provide numerical guidance to the National Hurricane Center for the forecasting of tropical cyclones’ track, intensity, and structu...
2020 HFIP R&D Activities Summary: Recent Results and Operational Implementation
This technical report describes the activities and results of the Hurricane Forecast Improvement Program (HFIP) that occurred in 2020. The major development focus remained in building the next generation hurricane model, the Hurricane Analysis and Forecast System (HAFS) within the Unified Forecast System (UFS), primarily for track and intensity ...
Institutions Earth System Research Laboratory - ESRL National Oceanic and Atmospheric Administration - NOAA
The Common Community Physics Package (CCPP) Framework v6
The Common Community Physics Package (CCPP) is a collection of atmospheric physical parameterizations for use in Earth system models and a framework that couples the physics to a host model’s dynamical core. A primary goal for this effort is to facilitate research and development of physical parameterizations and experimentation with physics-dyn...
Institutions National Center for Atmospheric Research - NCAR National Oceanic and Atmospheric Administration - NOAA University Corporation for Atmospheric Research - UCAR
Advancing Tropical Cyclone Precipitation Forecast Verification Methods and Tools
Tropical cyclone (TC) forecast verification techniques have traditionally focused on track and intensity, as these are some of the most important characteristics of TCs and are often the principle verification concerns of operational forecast centers. However, there is a growing need to verify other aspects of TCs as process-based validation tec...
Institution National Oceanic and Atmospheric Administration - NOAA
A Case Study Investigating the Low Summertime CAPE Behavior in the Global Forecast System
Convective available potential energy (CAPE) is an important index for storm forecasting. Recent versions (v15.2 and v16) of the Global Forecast System (GFS) predict lower values of CAPE during summertime in the continental United States than analysis and observation. We conducted an evaluation of the GFS in simulating summertime CAPE using an e...
Institution National Oceanic and Atmospheric Administration - NOAA
Envisioning the Future of Community Physics
A large cadre of physics developers, model developers interested in physics-dynamics coupling, code managers, computational scientists met virtually for the Common Community Physics Package (CCPP) Visioning Workshop to discuss the current status and future of the project. Key topics included the need for additional functionality, preparing for p...
Institutions National Center for Atmospheric Research - NCAR National Oceanic and Atmospheric Administration - NOAA
Common Community Physics Package: Fostering Collaborative Development in Physical Parameterizations
The Common Community Physics Package (CCPP) is a state-of-the-art infrastructure designed to facilitate community-wide development of atmospheric physics parameterizations, support their interoperability among different modeling centers, and enable the transition of research to operations in NWP and climate modeling. The CCPP consists of two ele...
Institution National Oceanic and Atmospheric Administration - NOAA