Visitor Projects

Improving METplus Test Infrastructure and Code Quality

Development of a threshold-weighted spatial verification approach to evaluate NWP performance for extreme events

Evaluation of the impact of different microphysics schemes on HAFS model QPF forecasts

Improvement of PBL Schemes within HAFS for Better Forecasts of TC Structure and Large-Scale Steering

UFS/METplus Hack-a-thon

Evaluating sub-grid cloud variability enhancements in HAFS tropical cyclone predictions

Using MET and METplus to evaluate precipitation forecasts at time scales up to and including sub-seasonal (monthly) time horizons

Retrospective Experiments with GSI Multiscale EnKF Data Assimilation for Convection-Allowing Stand-Alone Regional FV3

Assessing the Rapid Refresh Forecast System Data Assimilation Capability to Represent an Amazon Coastal Squall Line

Evaluating CCPP Physics Across Scales for Severe Convective Events

Gallus, W. A., Jr., and M. A. Harrold, 2023: Challenges in numerical weather prediction of the 10 August 2020 midwestern derecho: Examples from the FV3-LAM.  Wea. Forecasting, 38 (8), 1429 - 1445, https://doi.org/10.1175/WAF-D-23-0019.1.

Testing Exponential-Random Cloud Overlap for HWRF Operations and Unifying RRTMG Radiation Codes in Operational Use at NOAA/EMC

Investigating the FV3-CAM data assimilation capability representing convective processes and structures of squall lines over the Great Plains

Banos, I. H., W.D. Mayfield, G. Ge, L. F. Sapucci, J. R. Carley, and L. Nance, 2022: Assessment of the data assimilation framework for the Rapid Refresh Forecast System v0.1 and impacts on forecasts of convective storms. Geoscientific Model Development, https://doi.org/10.5194/gmd-2021-289.

Use GOES data to evaluate the performance of Hurricane Analysis and Forecast System (HAFS)

Bao, S., Bernardet, L., Thompson, G., Kalina, E., Newman, K., & Biswas, M. (2020). Impact of the hydrometeor vertical advection method on HWRF’s simulated hurricane structure. Weather And Forecasting, 35, 723-737. doi:10.1175/WAF-D-19-0006.1.    

Bao, S., Z. Zhang, E. Kalina, and B. Liu, 2022.  The use of composite GOES-R satellite imagery to evaluate a TC intensity and vortex structure forecast by an FV3GFS-based hurricane forecast model.  Atmosphere, 13 (1), 126, https://doi.org/10.3390/atmos13010126.

WRF as a User-Friendly Cloud Service

Evaluation of Newly Developed Observation Operators for Assimilating Radar Radical Velocity Observations in GSI to Improve Storm Forecast Using the HRRR System

Improving Heavy Rainfall Guidance from Convection-Allowing Ensembles Using Machine Learning

Loken, E. D., A. J. Clark, A. McGovern, M. Flora, and K. Knopfmeier, 2019: Postprocessing Next-Day Ensemble Probabilistic Precipitation Forecasts Using Random Forests. Wea. Forecasting, 34, 2017–2044, https://doi.org/10.1175/WAF-D-19-0109.1.    

Loken, E. D., A. J. Clark, and C. D. Karstens, 2020: Generating Probabilistic Next-Day Severe Weather Forecasts from Convection-Allowing Ensembles Using Random Forests. Wea. Forecasting, 35, 1605–1631, https://doi.org/10.1175/WAF-D-19-0258.1.

3D-Var data assimilation of VIIRS aerosol retrievals

Evaluating and Improving Planetary Boundary Layer Parameterizations in HWRF using Aircraft Observations

Zhang, J. A., E. A. Kalina, M. K. Biswas, R. F. Rogers, P. Zhu, and F. D. Marks, 2020.  A review and evaluation of planetary boundary layer parameterizations in hurricane weather research and forecasting model using idealized simulations and observations.  atmosphere, 11, 1091, 1 - 21, doi:10.3390/atmos11101091.  Available at: https://www.mdpi.com/2073-4433/11/10/1091/pdf 

Facilitation transition of GSI based hybrid EnVar data assimilation research and development on global, hurricane and convective predication to NWS operational NWP suites

A New Measure of Ensemble Central Tendency

Adapting MODE for High-Resolution Model Snowband Verification

Advanced Distance-based, Field Deformation and Statistical Hypothesis Utilities for MET

Gilleland, E., G. Skok, B. G. Brown, B. Casati, M. Dorninger, M. P. Mittermaier, N. Roberts, and L. J. Wilson, 2020. A novel set of verification test fields with application to distance measures. Mon. Wea. Rev., 148 (4), 1653 - 1673, doi: 10.1175/MWR-D-19-0256.1.

Towards improved knowledge of the vertical distribution of aerosols in the atmosphere: Assimilation of vertical LIDAR measurements

Towards improving high resolution NWP forecasts of convection using an explicit/ bin microphysics scheme to guide bulk microphysics scheme improvements

Testing Variations of Exponential-Random Cloud Overlap with RRTMG in HWRF

Evaluating the Impact of Model Physics on HWRF Forecasts of Tropical Cyclone Rapid Intensification

An Adaptive Bayesian Model Combination (BMC) Post Processor for the HRRR-TLE Forecast System

Use of the CLUE to examine importance of mixed physics in ensembles

R20 transition of the GOES-R GLM lightning assimilation capability in GSI for use in NCEP GDAS

Evaluation of the Newly Developed Observation Operators for Assimilating Satellite Cloud Precipitation Observations in GSI within HWRF system

Advanced Data Assimilation Techniques Applied to a Regional High Resolution Rapid Refresh Model in Alaska (HRRR-Alaska)

Testing Revisions to RRTMG Cloud Radiative Transfer and Performance in HWRF

Impact of Planetary Boundary Layer Assumptions on HWRF Forecast Skill

Bu, Y. P., R. G. Fovell, and K. L. Corbosiero, 2017: The influences of boundary layer mixing and cloud-radiative forcing on tropical cyclone size. J. Atmos. Sci., 74, 1273–1292, https://doi.org/10.1175/JAS-D-16-0231.1.

Quantifying the Value of Radar Data Assimilation in the Community Leveraged Unified Ensemble using Object-Based Verification Methods

Developing Landfall Capability in Idealized HWRF for Assessing the Impact of Land Surface on Tropical Cyclone Evolution

Evaluation of the microphysics scheme in HWRF 2016 version with remote-sensing data

Object Based Verification for the HRRR Model using Simulated and Observed GOES Infrared Brightness Temperatures

Mesoscale Model Intercomparison at Convection-Allowing Resolution using MODE

  Starzec, M., G.L. Mullendore, and P.A. Kucera, 2018: Using Radar Reflectivity to Evaluate the Vertical Structure of Forecasted Convection. J. Appl. Meteor. Climatol., 57 (12), 2835 - 2849, https://doi.org/10.1175/JAMC-D-18-0116.1 

Implementation and Validation of a Geo-Statistical Operator for the Assimilation of Near-Surface Winds in GSI

Improving WRF Weather Forecast through Enhanced Representation of Cropland-Atmosphere Interactions

Diagnosing Tropical Cyclone Motion Forecast Errors in the 2014 HWRF Retrospective Test (H214)

Demonstration Project: Development of a Large Member Ensemble Forecast System for Heavy Rainfall using Evolutionary Programming

Developing and supporting global HWRF ocean coupling with advanced ocean physics and initialization options and new diagnostic tools for comprehensive model evaluation

Towards improving representation of convection and MCC longevity in high-resolution WRF and NEMS-NMMB model forecasts

Evaluation of two HWRF microphysics/radiation configurations with remote-sensing data

Estimation of Initial and Forecast Error Variances for the NCEP operational Short-Range Ensemble Forecast (SREF) system

Diagnosing Tropical Cyclone Motion Forecast Errors in HWRF

Improving HWRF Track and Intensity Forecasts via Model Physics Evaluation and Tuning

Impact Assessment of Cloud-Affected AMSU-A Radiance Assimilation in TC Inner-Core Region using Hybrid Data Assimilation Approaches

Incorporating Observations Uncertainty to a Spatial Probabilistic Verification Framework for km-scale Models

Object-based Time-Domain Diagnostics for High-resolution Ensemble Forecasting and Evaluation in NOAA/HWT Spring Forecasting Experiments

Development and Application of 3-Dimensional Object Algorithms to High Resolution Forecasts

Improvements to modeling persistent surface cold pools in WRF

Moving The NEMS & NMM-B Into a Broader Community Resource Environment

Deploying the MIT Field Alignment System and Test-bed (FAST) in DTC

Development of an HWRF Diagnostics Module to Evaluate Intensity & Structure Using Synthetic Flight Paths Through Tropical Cyclones

Alaska High Resolution Rapid Refresh (HRRR-AK) - Verification and Study of Model Configuration for Operational Deployment

Studies of Hurricane Initialization in Short-term Intensity Forecasts

Development of Operational Weather Research and Forecasting Model Ensemble Sensitivity/Data Assimilation Tools

Incorporating spatial analysis of forecast performance into the MET package at the DTC

A generalized parameterization for clouds and turbulence in WRF

Cut-Cell Representation of Orography: Exploring an Alternative Method for Dealing with Flows over Steep and Complex Terrain

Assimilation of GPS RO and its Impact on Numerical Weather Predictions in Hawaii

Zhou, Chunhua, and Ying-Len Chen, 2014Assimilation of GPS RO Refractivity Data and Its Impact on Simulations of Trade Wind Inversion and a Winter Cold Front, Natural Science, Vol. 6, pp 605-614.

The role of low-level jets in the cold air damming events using high resolution Advanced Research WRF model

Prabha, T. V., and G. Hoogenboom (2009), Observed dimming effect during a forest fire in the southeastern United States and the role of aerosols, Geophys. Res. Lett., 36, L11806, doi:10.1029/2009GL038435.

Introduction of terrain-intersecting coordinates into WRF

Development of a multi-scale operational Weather Research and Forecasting model ensemble Kalman filter

Implementation and validation of WRF model as ensemble member of a probabilistic prediction system over Europe

Verification of WRF ensembles using object oriented approaches

Gallus, W. A., Jr., 2010: Application of object-based verification techniques to ensemble precipitation forecasts. Weather and Forecasting, vol. 25, 144-158.

Evaluation of WRF model improvements with novel boundary-layer observations: Focus on diurnal cycle and stable boundary layer

New large eddy simulation subfilter turbulence models implemented into the Advanced Research WRF version 3.0

Implement and evaluate an improved Mellor-Yamada level-2.5 and level-3 turbulence closures in WRF

Implementation of the two-moment RAMS cloud microphysics in ARW: Comparisons against one-moment closure in WRF

Implementation of the Quasi-Normal Scale Elimination (QNSE) Model of stably stratified turbulence in WRF

Idealized orographic flow simulations in NMM and ARW

Establishment of a verification testbed at the WRF Developmental Testbed Center

Scale-decomposition verification tools for the WRF model

Verification of WRF Experiments Over the Southeast United States

Object-oriented Verification of Reflectivity Fields based on Cluster Analysis

Marzban, C., S. Sandgathe, 2008: Cluster Analysis for Object-Oriented Verification of Fields: A Variation. Monthly Weather Review, Vol. 136, 1013-1025.

Marzban, C., S. Sandgathe, and H. Lyons 2008: An Object-oriented Verification of Three NWP Model Formulations via Cluster Analysis: An objective and a subjective analysis. Monthly Weather Review, Vol. 136, 3392-3407.

Marzban, C., and S. Sandgathe 2006: Cluster analysis for verification of precipitation fields. Weather and Forecasting, Vol. 21, 824-838.

Verification Development: An events-oriented approach to verifying high resolution forecasts of wintertime precipitation

Verification and Calibration of Simulated Reflectivity Products

Radiance Data Assimilation in ARW WRF Mesoscale System

Implementation and Evaluation of WSR-88D Radial Velocity Data Assimilation for WRF-NMM via GSI

A Real Case Study of Using Cloud Analysis in Grid-point Statistical Interpolation Analysis and Advanced Research WRF Forecast System

High-Resolution Winter-Season NWP: Preliminary Evaluation of the WRF ARW and NMM Models in the DWFE Forecast Experiment

Skamarock, William C., and David Dempsey, 2005: High-resolution winter-season NWP: Preliminary evaluation of the WRF ARW and NMM models in the DWFE forecast experiment. 21th Conference on Weather and Forecasting/17th Conference on Numerical Weather Prediction, August 1-5, 2005, Washington, D.C., American Meteorology Society.

Quantifying the dependence of convective parameterization activity on horizontal grid spacing in WRF: Preliminary Results

Study of the impacts of grid spacing and physical parameterizations on WRF simulations of convective system rainfall and morphology

A new multi-scale verification method for WRF

Relaxed Threat Score

Lin, Ying, Barbara G. Brown, Keith Brill and Geoffrey J. DiMego, 2005: Optimally Shifted QPF Verification Scores. 21th Conference on Weather and Forecasting/17th Conference on Numerical Weather Prediction, August 1-5, 2005, Washington, D.C., American Meteorology Society.

Testing of WRF model configurations

An investigation of forecast sensitivities to dynamic core and physics during the warm season

Gallus Jr., W.A. and J. F. Bresch: Comparison of Impacts of WRF Dynamic Core, Physics Package, and Initial Conditions on Warm Season Rainfall Forecasts, Monthly Weather Review, Vol. 134, pp. 2632-2641.

Jankov, I., W. A. Gallus Jr., M. Segal and S. E. Koch, 2007: Influence of Initial Conditions on the WRF-ARW Model QPF Response to Physical Parameterization Changes. Weather and Forecasting, Vol. 22, pp. 501-519