HRD Monthly Science Meeting of November 2019

November’s science meeting consisted of four presentations: Andy Hazelton -  “Global-Nested HAFS 2019 Real-time Demo Results” Ghassan Alaka - "2019 Basin-scale HWRF (HWRF-B): An HFIP Real-Time Demonstration Project on WCOSS" James Hlywiak -  “Sensitivities of the Decay of the Near-Surface Tropical Cyclone Wind Field to Inland Surface Roughness and Soil Moisture“ Rob Rogers -  “A comparison of a …

2019 Hurricane Field Program Season in Review and Hotwash, 13 November 2019

The purpose of the season review and "hotwash" is to review the highlights from the season and discuss what went right / what went wrong / and what could be done better in the future with respect to Hurricane Field Program operations/plans/logistics, as well as provide feedback to AOC about the aircraft and their operations. …

Hurricane Field Program Update — Thursday, October 17, 2019, 5pm EDT

We are planning two flights into Potential Tropical Cyclone 16 for Friday.  The first, with NOAA42, will depart Lakeland at 0800 EDT (1200 UTC) and perform a lawnmower pattern through and around the system The second, with NOAA43, will depart 12 hour later, and perform a butterfly pattern Both will return to Lakeland.  Both missions …

Paper on the height of the layer nearest the surface in hurricanes and how it changes with storm motion published in the journal Atmosphere

You can read the study at https://www.mdpi.com/2073-4433/10/6/339

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 …

Paper on differences in the region just above the ocean in intensifying and weakening hurricanes published in Monthly Weather Review

Read the full article at https://journals.ametsoc.org/doi/pdf/10.1175/MWR-D-18-0380.1,

Paper on how downdrafts in hurricanes affect intensity published in Monthly Weather Review

Summary: This study looks at differences between tropical cyclones that strengthen and those that do not using data collected by dropsondes, small instruments released from hurricane hunter aircraft that measure wind, temperature, and moisture as they fall to the surface. Important Conclusions: 1. The fuel that supports tropical cyclones is the heat and moisture from …

Paper on getting the best TC forecasts using NOAA’s G-IV published in Monthly Weather Review

Summary: During each hurricane season, NOAA’s Gulfstream-IV (G-IV) Hurricane Hunter aircraft measures wind, temperature, humidity, and pressure in and around hurricanes threatening the United States.  An instrument called the dropwindsonde is released from the G-IV to collect the data as it falls to the ocean surface.  The plane currently flies where we expect observations from the …

Hurricane Field Program Update — Thursday, September 26, 2019, 5pm EDT

Both NOAA43 and NOAA49 are now in Barbados prepared for missions into Hurricane Lorenzo.  NOAA49 will conduct a NESDIS Satellite Validation and Diurnal Cycle Experiment, takeoff from Barbados 0800 AST/EDT (1200 UTC).  The goal is to sample the region around Lorenzo, including the Saharan Air Layer, and regions deemed sensitive to future forecasts.  There will …

Hurricane Field Program Update — Friday, September 20, 2019, 5pm EDT

NOAA49 will conduct a tropical cyclone in shear research in and around Hurricane Jerry.  Takeoff will be from Barbados at 1330 AST (1730 UTC), with recovery in Lakeland about 8 hours later.  NOAA42 will be conducting an operational INVEST mission into AL99 just to the east of the Windward Islands, with takeoff at 1030 AST …