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

Study shows for the first time how and where dry air in the tropical cyclone core can impact intensity. Paper published in The Journal of the Atmospheric Sciences

In the middle atmosphere in and around tropical cyclones, around 2 to 5 km above the surface, air is cooler and drier than near the ocean surface. It is well known that this cool, dry air can be brought down toward the surface by heavy rain in thunderstorms, where the air flows toward the tropical … Continue reading Study shows for the first time how and where dry air in the tropical cyclone core can impact intensity. Paper published in The Journal of the Atmospheric Sciences

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

HRD scientists participate in the 34th American Meteorological Society Conference on Hurricanes and Tropical Meteorology

34th Conference on Hurricanes and Tropical Meteorology Virtual Meeting The 34th AMS Conference on Hurricanes and Tropical Meteorology was held virtually 10-14 May after being postponed from 2020. This is the premiere meeting for operational and research scientists who work on understanding and forecasting tropical cyclones and other tropical weather around the world. HRD scientist … Continue reading HRD scientists participate in the 34th American Meteorological Society Conference on Hurricanes and Tropical Meteorology

HRD Monthly Science Meeting of April 2021

April's science meeting consisted of four presentations: Xiaomin Chen: "Boundary Layer Recovery and Precipitation Symmetrization Preceding Rapid Intensification of Tropical Cyclones under Shear" Andy Hazelton: "HAFS Ensemble of Hurricane Dorian (2019): Early Intensity and Long-Term Track" Jon Zawislak: "Accomplishments of NOAA's Airborne Hurricane Field Program and a Broader Future Approach to Forecast Improvement" Kathryn Sellwood: … Continue reading HRD Monthly Science Meeting of April 2021

HRD Monthly Science Meeting of February 2021

February's science meeting was hosted by NHC and consisted of nine presentations. The first two presented an overview of the proposed Tropical Marine Testbed (TMT) from a NWS and OAR perspective, and the remaining seven presentations were from NHC and HRD researchers describing potential projects that the TMT might tackle:  Overview of Tropical Marine Testbed … Continue reading HRD Monthly Science Meeting of February 2021

Paper describing how tropical cyclones in shear rapidly develop published in the Journal of the Atmospheric Sciences

Tropical Cyclones (TCs) occur over warm water in the ocean, and this warmth and moisture is what feeds the engine that keeps the TC going.  They are made up of thunderstorms, what we call deep convection, and within the convection, there are both convective updrafts and convective downdrafts.  The temperature in the atmosphere goes down … Continue reading Paper describing how tropical cyclones in shear rapidly develop published in the Journal of the Atmospheric Sciences

Rob Rogers participates in the 2020 HIWeather Workshop

HIWeather is a World Meteorological Organisation research project, developing warning capabilities for weather-related hazards, to increase resilience worldwide. HIWeather participants form an international network of scientists, in a wide variety of disciplines, all concerned with aspects of the production and communication of weather-related warnings.  The workshop is aimed at anyone interested in improving weather-related warnings, … Continue reading Rob Rogers participates in the 2020 HIWeather Workshop