Results 21 to 30 of about 327 (141)

Evaluation of the Four-Dimensional Ensemble-Variational Hybrid Data Assimilation with Self-Consistent Regional Background Error Covariance for Improved Hurricane Intensity Forecasts

Atmosphere, 2020
The feasibility of a hurricane initialization framework based on the Gridpoint Statistical Interpolation (GSI)-based four-dimensional ensemble-variational (GSI-4DEnVar) hybrid data assimilation system for the Hurricane Weather Research and Forecasting ...
Shixuan Zhang, Zhaoxia Pu
doaj   +2 more sources

Description and Analysis of the Ocean Component of NOAA’s Operational Hurricane Weather Research and Forecasting Model (HWRF) [PDF]

Journal of Atmospheric and Oceanic Technology, 2015
AbstractThe 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.
Yablonsky, Richard M., Ginis, Isaac, Thomas, Biju, Tallapragada, Vijay, Sheinin, Dmitry, Bernardet, Ligia   +5 more
openaire   +3 more sources

The Indian Ocean–Land–Atmosphere (IOLA)‐Coupled Mesoscale Prediction Framework for Inland Severe Weather and Coastal Hazards Forecasting

Meteorological Applications
Over the last decade, tropical cyclone (TC) track and intensity predictions have improved by nearly 50% in the Atlantic and Northern Indian Ocean, driven by advancements in ocean‐coupled numerical models, data assimilation techniques, and an expanding ...
Sundararaman Gopalakrishnan, Krishna K. Osuri, Dev Niyogi, Sudheer Joseph, Shyama Mohanty, Yerni Srinivas Nekkali, Sasanka Talukdar, N. D. Manikanta, Imamah Ali, Ghassan Alaka, Ananda Das, Raghu Nadimpalli, Akhil Srivastava, Srinivas Kumar Tummala, T. M. Balakrishnan Nair, M. Mohapatra, V. S. Prasad, A. Suryachandra Rao, U. C. Mohanty, R. Krishnan, Frank Marks, M. Ravichandran   +21 more
doaj   +2 more sources

Comparación entre la Componente Atmosférica del Sistema HWRF y el Modelo WRF-HWRF Utilizando Diferentes Resoluciones Horizontales en la Simulación del Huracán Irma (2017). Parte I [PDF]

Revista Brasileira de Meteorologia, 2021
Resumen Se realizó un estudio de caso de varias configuraciones de modelos de pronóstico numérico para evaluar la habilidad de los mismos en el pronóstico de la intensidad y trayectoria de los ciclones tropicales.
Albenis Pérez-Alarcón, Oscar Díaz-Rodríguez, José Carlos Fernández-Alvarez, Ramón Pérez-Suárez, Patricia Coll-Hidalgo   +4 more
doaj   +4 more sources

Evaluating the Impact of Improvements in the Boundary Layer Parameterization on Hurricane Intensity and Structure Forecasts in HWRF

Monthly Weather Review, 2015
Abstract As part of the Hurricane Forecast Improvement Project (HFIP), recent boundary layer physics upgrades in the operational Hurricane Weather Research and Forecasting (HWRF) Model have benefited from analyses of in situ aircraft observations in the low-level eyewall region of major hurricanes.
Jun A. Zhang, David S. Nolan, Robert F. Rogers, Vijay Tallapragada   +3 more
openaire   +2 more sources

Multi-season evaluation of hurricane analysis and forecast system (HAFS) quantitative precipitation forecasts

Frontiers in Earth Science
Quantitative precipitation forecasts (QPF) from numerical weather prediction models need systematic verification to enable rigorous assessment and informed use, as well as model improvements.
Kathryn M. Newman, Brianne Nelson, Mrinal Biswas, Linlin Pan, Linlin Pan   +4 more
doaj   +2 more sources

Understanding the Role of Antecedent Land Conditions on Rapid Intensity Changes in Landfalling Tropical Cyclones Over the Bay of Bengal

Meteorological Applications
Two tropical cyclones (TCs)—Phailin and Lehar over the Bay of Bengal (BoB) in 2013 exhibit contrasting rapid intensity changes near landfall, despite forming in similar synoptic environments. Phailin underwent a rapid intensification of ~70 knots between
Raghu Nadimpalli, Yerni Srinivas Nekkali, Krishna K. Osuri, M. Mohapatra, Dev Niyogi   +4 more
doaj   +2 more sources

Validation of Ensemble-Based Probabilistic Tropical Cyclone Intensity Change

Atmosphere, 2021
Although there has been substantial improvement to numerical weather prediction models, accurate predictions of tropical cyclone rapid intensification (RI) remain elusive.
Ryan D. Torn, Mark DeMaria
doaj   +1 more source

Steering flow and vortex tilt in basin-scale HWRF

, 2019
The purpose of this project is to evaluate layer mean wind (i.e., “steering flow”), tropical cyclone (TC) vortex tilt, and TC motion produced by the “Basin-Scale” Hurricane Weather Research and Forecasting (HWRF-B) Model.
Camposano, Samantha
core   +4 more sources

Impact of the Hydrometeor Vertical Advection Method on HWRF’s Simulated Hurricane Structure [PDF]

Weather and Forecasting, 2020
Abstract 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 ...
Shaowu Bao, L. Bernardet, G. Thompson, E. Kalina, K. Newman, M. Biswas   +5 more
openaire   +1 more source