HRD Monthly Science Meeting of October 2019

October’s science meeting consisted of seven presentations: Sim Aberson -  “A comparison of SAMURAI, HEDAS, and radar analyses for Hurricane Patricia (and a sneak peek into Dorian)” Lisa Bucci - "Understanding the response of tropical cyclone structure to the assimilation of synthetic wind profiles" Hui Christophersen - "TROPICS Radiance OSSE Update" Xiaomin Chen -  “A … Continue reading HRD Monthly Science Meeting of October 2019

Paper on how tropical cyclones in shear intensify published in Geophysical Research Letters

Summary: Tropical cyclones (TCs) are made up of thunderstorms (what we call convection), and these storms have strong winds moving up and down (what we call up- and downdrafts). Dry air enhances evaporative cooling (the same process that cools people when they sweat) from convective downdrafts, reducing the temperature and humidity in low levels; this … Continue reading Paper on how tropical cyclones in shear intensify published in Geophysical Research Letters

Hurricane Field Program Update — Thursday, September 19, 2019, 10pm EDT

NOAA49 will conduct an operational synoptic surveillance mission around Hurricane Jerry, taking off from Barbados at 130 EDT (1730 UTC), and landing there about 8 hours later.  The goal is to gather dropwindsonde data to improve model forecasts of the hurricane.  The targets for this mission are Jerry itself and the subtropical ridge to its … Continue reading Hurricane Field Program Update — Thursday, September 19, 2019, 10pm EDT

50th Anniversary of Hurricane Camille

On the night of August 17-18th, 1969, Hurricane Camille came howling into Waveland, MS, with estimated sustained winds of 175 mph (280 km/hr) and a storm surge of 24 feet (7.3 m) to become the second strongest hurricane on record to make landfall in the United States (after the Labor Day Hurricane of 1935).  Camille also … Continue reading 50th Anniversary of Hurricane Camille

HRD Seminar – Jonathan Martinez, Colorado State University – 20 August 2019

Jonathan presented a two-part seminar with titles; Part I: "Axisymmetric Potential Vorticity Evolution of Hurricane Patricia (2015)" and Part II: "On the Contributions of Incipient Vortex Circulation and Environmental Moisture to Tropical Cyclone Expansion”. Part I: Axisymmetric Potential Vorticity Evolution of Hurricane Patricia (2015) Abstract Operational numerical models failed to predict the record-setting rapid intensification and … Continue reading HRD Seminar – Jonathan Martinez, Colorado State University – 20 August 2019

HRD Seminar – George “Trey” Alvey, CIMAS/HRD – 16 July 2019

Trey presented a seminar titled “How do sheared tropical cyclones evolve towards symmetry before rapid intensification?" ABSTRACT: In seemingly similar environments, some moderately sheared tropical storms undergo rapid intensification (RI) evolving towards more symmetrical precipitation structures but others do not. What role do the vortex tilt, humidification, and precipitation symmetry play in helping distinguish those … Continue reading HRD Seminar – George “Trey” Alvey, CIMAS/HRD – 16 July 2019

HRD Monthly Science Meeting of May 2019

May’s science meeting consisted of seven presentations: Kelly Ryan: Projects featuring collaboration and consultation on OSEs, OSSEs, data visualization, and machine learning William Ramstrom: Nest Development for FV3 Michael Fischer: Potential mechanisms for two secondary eyewall formation events in Hurricane Irma (2017) Kelly Nunez (PSU): PV budget analysis of high resolution simulations to understand the … Continue reading HRD Monthly Science Meeting of May 2019