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

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

Flights continue in Hurricane Ida

NOAA has so far completed five flights into and around Hurricane Ida as it crossed over the Cayman Islands and western Cuba toward its forecast landfall along the Louisiana coast. Two synoptic surveillance missions were conducted by the NOAA G-IV high-altitude aircraft to gather dropwindsonde and Doppler radar data around the hurricane to be ingested … Continue reading Flights continue in Hurricane Ida

NOAA Hurricane Hunters fly into and around Fred, Grace, and Henri, and gear up for the next system

NOAA Hurricane Hunters completed 6 missions into Tropical Storm Fred, and 11 and 7 missions in and around Hurricanes Grace and Henri, respectively. The first mission into Fred occurred before the system had a well-defined center and was not yet named a tropical depression. Subsequent missions sampled the dry air and wind shear around Fred … Continue reading NOAA Hurricane Hunters fly into and around Fred, Grace, and Henri, and gear up for the next system

HRD Monthly Science Meeting of July 2021

July's science meeting consisted of five presentations: Sophie Grimsley (Lapenta Intern): "Project Check-in: Hurricane Intensity Change and Boundary Layer Processes" Nick Mesa (Lapenta Intern): "Investigating Intensity Changes Related to Thermodynamic Processes Using Near-coincident Aircraft and Satellite Observations" Laura Ko: "A Consensus Machine Learning Model for Hurricane RI Probabilistic Predictions" Sim Aberson: "Including High-Resolution AMVs in … Continue reading HRD Monthly Science Meeting of July 2021

Storymap: Improvements in Forecasting Weather, Floods, and Hurricanes: Overview Report on Supplemental Program FY18

The storymap includes work on the Hurricane Analysis and Forecasting System (HAFS), a set of moving, high-resolution nests around tropical cyclones in the global weather model, and the AOML Hurricane Model Viewer. View there storymap at https://storymaps.arcgis.com/stories/17d9393d307449a3a46fa3aa6dd5e258. For more information, contact aoml.communications@noaa.gov. Credits: The Supplemental Program Team is managed by the NOAA Line Offices of: … Continue reading Storymap: Improvements in Forecasting Weather, Floods, and Hurricanes: Overview Report on Supplemental Program FY18

HRD Monthly Science Meeting of June 2021

June's science meeting consisted of six presentations: Nick Mesa (HRD): “Investigating intensity changes related to thermodynamic processes using near-coincident aircraft and satellite observations” Sophie Grimsley (HRD): “Hurricane Intensity Change and Boundary Layer Processes” Chris Landsea (NHC): "Was 2020 a Record-Breaking Hurricane Season?  Yes, but… (Why did the new average number of Named Storms go up … Continue reading HRD Monthly Science Meeting of June 2021

Latest edition of AOML Keynotes now available

Articles include information on the testing of the Altius-600 uncrewed aircraft in hurricanes, an overview of different boundary-layer techniques in hurricane models, new hurricane model systems, Nancy Griffin's retirement after 40 years of government service, and a tribute to Bob Kohler. Read Keynotes at https://www.aoml.noaa.gov/wp-content/uploads/2021/05/Jan-Mar-2021-AOML-Keynotes-Newsletter-2.pdf?utm_source=newsletter&utm_medium=january-march-2021&utm_campaign=keynotes