HRD Debrief for missions into Hurricanes Irma, Jose, and Maria – Part 2 – 19 October 2017

HRD researchers discussed the results from the 17 P-3, 13 G-IV, and 51 AF WC-130 missions into Hurricanes Irma, Jose, and Maria (3-8 September 2017). The agenda for the discussion was: HRD/AOML support for EMC operations (Paul Reasor) TDR-related issues, resolved and continuing (John Gamache) Data impacts on HWRF forecasts (Jason Sippel) Open discussion of …

HRD Monthly Science Meeting of October 2017

October’s science meeting consisted of 5 presentations: Gus Alaka – 2017 Basin-Scale HWRF Preliminary Verification Sim Aberson – IFS (EC) and GFS Forecasts During 2017 Sim Aberson – Extreme Horizontal and Vertical Winds Measured by Dropwindsondes During the 2017 Hurricane Field Program Lisa Bucci – P-3 Doppler Wind Lidar: 2017 Progress Heather Holbach – WSRA …

Paper on changes to the intensity of tropical waves during the hurricane season published in the Journal of Climate

African easterly waves (AEWs) are areas of low air pressure that move westward across North Africa and into the Atlantic Ocean. AEWs can cause intense thunderstorms, and, once over the warm waters of the Atlantic Ocean, they may become tropical cyclones that might affect the Caribbean and North America. In summer, many AEWs form in, …

HRD Debrief for missions into Hurricane Harvey – 1 September 2017

HRD researchers discussed the results from the four P-3, four G-IV, and one Global Hawk mission into Hurricane Harvey (23-25 August 2017). The agenda for the discussion was: Missions Overview (Paul Reasor) Science Discussions 20170824H1 TDR (Robert Rogers) 20170824H2 TDR (Jon Zawislak) 20170825H1 TDR (Robert Rogers) 20170825H2 TDR/OceanWinds (Jon Zawislak) Additional Field Program Issues HWRF …

HRD Monthly Science Meeting of July 2017

July’s science meeting consisted of 6 presentations: Steve Guimond (NASA) - "Reviving the Imaging Wind and Rain Airborne Profiler (IWRAP) for Hurricane Research: A Case Study of Hurricane Rita (2005)" Mu-Chieh (Laura) Ko - "Preliminary Review – HWRF-B 2016 Retrospective Dataset" Robert Rogers - "The Challenge of Intensity Forecasting in Moderate Shear" Emily Paltz (Hollings …

Paper on the new basin-scale version of HWRF developed at HRD published in Weather and Forecasting

The Hurricane Weather Research and Forecasting Model (HWRF) has become an important tool for both hurricane forecasters and researchers. The current HWRF has three domains around only one tropical cyclone. Its inner domain makes forecasts on a grid with points 2 km apart and follows the tropical cyclone during the forecast. During hurricane season in …

HRD Monthly Science Meeting of April 2017

April’s science meeting consisted of 6 presentations: Gus Alaka: 2016 Basin-Scale HWRF MET-TC Verification 2016 Atlantic Basin Xuejin Zhang: Basin-scale HWRF Verification Mu-Chieh Ko (Laura): HIWPP Precipitation Evaluation – Selected cases of 2016 Atlantic Hurricane Season Kathryn Sellwood: Assimilating Hurricane Imaging Radiometer (HIRAD) Surface Wind Speeds for Analyses and Forecasts of Tropical Cyclones Pete Finocchio …

Paper on easterly waves in the Eastern Pacific that can form into tropical cyclones published in The Journal of the Atmospheric Sciences

“Easterly waves” are areas of low air pressure in the tropics that move westward and may become tropical cyclones. The most well-known type of easterly wave is the “African easterly wave,” which moves from West Africa north of the equator into the Atlantic Ocean and sometimes into the Pacific. Although almost all Northeast Pacific tropical …