Study of the surface inflow into tropical cyclones from Synthetic Aperture Radar published in Geophysical Research Letters

This study developed a model to investigate tropical cyclone (TC) surface-wind inflow angle asymmetry. The model has been applied to 130 spaceborne synthetic aperture radar (SAR) images over a large variety of TCs. This model can detect the asymmetric surface-wind structure and the associated inflow angles, and other standard information such as center locations, symmetrical … Continue reading Study of the surface inflow into tropical cyclones from Synthetic Aperture Radar published in Geophysical Research Letters

HRD Monthly Science Meeting of October 2021

October's science meeting consisted of six presentations: Xiaomin Chen: A Framework for Simulating the Tropical-Cyclone Boundary Layer Using Large-Eddy Simulation Sim Aberson: Sally:  An Aborted Attempt to Form an Aligned Vortex Kathryn Sellwood: Assimilation of Coyote Observations with HWRF GSI Jon Zawislak: Summary of NASA's CPEX-AW Field Campaign Lisa Bucci: Comparison of Aeolus Observations to NOAA Dropsondes Kyle Ahern: How were … Continue reading HRD Monthly Science Meeting of October 2021

NOAA completes aircraft investigations into Hurricane Sam

The two NOAA P-3 aircraft, along with the NOAA G-IV, are returning to Lakeland today after 6 days in the Caribbean flying into and around Hurricane Sam, the strongest storm in the Atlantic so far this year. The aim of these collaborative missions between AOML/HRD and the Office of Naval Research Tropical Cyclone Rapid Intensification (TCRI) field … Continue reading NOAA completes aircraft investigations into Hurricane Sam

Hurricane Field Programs gears up to fly Sam, recaps missions so far this year

All three NOAA heavy aircraft are deploying to St. Croix today in preparation for missions into what is now Tropical Storm Sam. AOML/HRD plans to collaborate with the Office of Naval Research Tropical Cyclone Rapid Intensification (TCRI) field campaign to fly P-3 and G-IV aircraft missions into Hurricane Sam in the central North Atlantic. The … Continue reading Hurricane Field Programs gears up to fly Sam, recaps missions so far this year

Study on the best way to improve forecasts using a proposed satellite-based Doppler Wind Lidar published in Monthly Weather Review

This study investigates how to get the largest improvements to tropical cyclone forecasts from wind profiles obtained from a proposed new instrument, a Doppler Wind Lidar, on polar-orbiting satellites.  Wind profiles have the largest impact when the tropical cyclone’s structure was changing rapidly and when the measurements were taken close to the tropical cyclone center. … Continue reading Study on the best way to improve forecasts using a proposed satellite-based Doppler Wind Lidar published in Monthly Weather Review

Study on small-scale vortices near the surface in tropical cyclones published in Scientific Reports

The full paper can be accessed at https://www.nature.com/articles/s41598-021-97766-7.pdf. For more information, contact aoml.communications@noaa.gov.Jie Tang and Xiaotu Lei were supported by the Key Program for International S&T Cooperation Projects of China (No. 2017YFE0107700), National Natural Science Foundation of China (No. 41475060 and 41775065) and the ESCAP/WMO EXOTICCA Project. Jun Zhang was supported by NOAA grant NA19OAR0220186 … Continue reading Study on small-scale vortices near the surface in tropical cyclones published in Scientific Reports

Saildrone observations of Atlantic Hurricanes to Improve Intensity forecasts

Improving the accuracy and ultimate value of  NOAA's operational hurricane forecasts requires more complete real-time knowledge of atmospheric and oceanic conditions and more realistic representation of key physical processes in forecast models. To meet these needs, a research team from NOAA's Pacific Marine Environmental Laboratory (PMEL) and Atlantic Oceanographic and Meteorological Laboratory (AOML) deployed five saildrones … Continue reading Saildrone observations of Atlantic Hurricanes to Improve Intensity forecasts

Study showing the impact of turbulence in computer forecasts of hurricanes released online in The Journal of the Atmospheric Sciences

Summary:  Turbulence is made up of random and continuously changing wind.  It is important in tropical cyclones because turbulence in the lowest 1-2 km of the atmosphere (the planetary boundary layer or PBL) and in clouds affects tropical cyclone intensity and structural change. Meteorologists use computer models to forecast the weather, including tropical cyclones.  These … Continue reading Study showing the impact of turbulence in computer forecasts of hurricanes released online in The Journal of the Atmospheric Sciences

Study on how to improve model forecasts of the region closest to the ocean surface released online in The Journal of the Atmospheric Sciences

Summary:  Turbulence is made up of random and continuously changing wind.  It is important in tropical cyclones (TCs) because turbulence in the lowest 1-2 km of the free atmosphere (the planetary boundary layer or PBL) affects TC intensity and structural change. Meteorologists use computer models to forecast the weather, including TCs. These models forecast the … Continue reading Study on how to improve model forecasts of the region closest to the ocean surface released online in The Journal of the Atmospheric Sciences