Study on how weak, disorganized tropical cyclones become upright allowing for intensification published in the Journal of Geophysical Research

This study shows how weak, disorganized tropical cyclones that have different center locations with height (misalignment) can develop a vertically aligned structure. The ability to predict whether and when a tropical cyclone will become aligned is important for intensity change forecasts, as storms can intensify quickly after achieving it. This study will help improve forecasts … Continue reading Study on how weak, disorganized tropical cyclones become upright allowing for intensification published in the Journal of Geophysical Research

Review of aircraft missions into Hurricane Earl

NOAA conducted 20 aircraft missions into Hurricane Earl in late August and early September. The series of flights over 12 days was the longest series of flights into one system that NOAA has conducted. We recently reviewed these flights, and the slides from the review can be found here. Flight tracks of all the NOAA … Continue reading Review of aircraft missions into Hurricane Earl

Happy International Cloud Appreciation Day!

As NOAA begins flights into Tropical Storm Fiona, we want to celebrate the first International Cloud Appreciation Day. Sponsored by the Cloud Appreciation Society, this is an internationally recognized day when people around the world are encouraged to spend a few moments appreciating the beauty of the sky. We thought we'd share some of the … Continue reading Happy International Cloud Appreciation Day!

HRD Monthly Science Meeting of July 2022

July’s science meeting consisted of five presentations: Josh Cossuth (ONR) - "The Geolocated Processing System (GeoIPS) A platform for collaborative development & processing satellite information" Jon Zawislak - "Overview of NASA's 2022 Convective Processes Experiment Cabo Verde (CPEX-CV)" Bruno Rojas (Lapenta Intern) - "Rapid Intensification of Hurricane Dorian Using HEDAS Analyses" Andy Hazelton - "AOML … Continue reading HRD Monthly Science Meeting of July 2022

Study on the impact of mountains on rainfall and intensity of tropical cyclones published in Monthly Weather Review

This paper explores the effect of mountainous terrain on the structure of a tropical cyclone eyewall by using a numerical model to simulate the landfall of a typhoon in the Central Mountain Range (CMR) of Taiwan and its reemergence over water after crossing the CMR. It was found that the presence of the CMR disrupted … Continue reading Study on the impact of mountains on rainfall and intensity of tropical cyclones published in Monthly Weather Review

Paper on observations of updrafts in hurricanes from NOAA Hurricane Hunter aircraft published in The Journal of Geophysical Research

This study uses NOAA airborne Doppler radar data to tie together the many different characteristics of convective rainband updrafts that have been documented, both by observations and from modeling studies. The results help shed light on how these updraft circulations are organized and what underlying dynamics might contribute to the observed organization. You can access … Continue reading Paper on observations of updrafts in hurricanes from NOAA Hurricane Hunter aircraft published in The Journal of Geophysical Research

Rob Rogers gave invited presentation at the opening ceremony for the Asia-Pacific Typhoon Collaborative Research Center (AP-TCRC) – 29 November 2021

On 29 November, 2021, Rob Rogers gave an invited virtual talk entitled "Advances in the Understanding and Prediction of Tropical Cyclone Intensity Change from Airborne Observations" at a new international joint tropical cyclone research organization, named the Asia-Pacific Typhoon Collaborative Research Center (AP-TCRC). The AP-TCRC is supported by the ESCAP/WMO Typhoon Committee (the Committee) and … Continue reading Rob Rogers gave invited presentation at the opening ceremony for the Asia-Pacific Typhoon Collaborative Research Center (AP-TCRC) – 29 November 2021

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