HRD Monthly Science Meeting of August 2018

August’s science meeting consisted of five presentations: Andrew Kren - HAMSR retrieval assimilation in the GSI system Josh Wadler (UM/RSMAS)- A Characterization of Turbulent Kinetic Energy and its Generation in Idealized Tropical Cyclone Simulations Gus Alaka - The Basin-Scale HWRF: 2018 HFIP Real-Time Demos Miguel Cortez – Summer 2018 Nerto update Stan Goldenberg - August …

Paper on the impact of Global Hawk dropsondes data on global model forecasts released online in Weather and Forecasting

Summary: The Global Hawk, a drone or unmanned aircraft system (UAS), has been used since 2010 to gather data to improve forecasts. The Global Hawk can release dropsondes that measure temperature, pressure, humidity, and wind up to four times every second, starting at an altitude of up to 60,000 feet until it falls to the …

HRD Seminar – Bill Ramstrom, Verisk Weather Solutions – 6 August 2018

Mr. Ramstrom presented a seminar titled "Damage Rates from Insurance Claims for Coastal and Inland Areas in Hurricanes Harvey and Irma". ABSTRACT: Insurance claims data provides a highly detailed view of the geographic patterns of damage in hurricanes. This talk will cover analytics that correlate claims percentages with maximum winds and rainfall during the landfalls …

70th Anniversary of seminal hurricane formation paper

In the summer 1948 edition of Geophysica journal, Eric Palmén published a seminal paper entitled "On the Formation and Structure of Tropical Hurricanes".  In it he proposed that a tropical disturbance needed to be over sea surface temperature of at least 80℉ (26-27℃) in order to form into a tropical cyclone.  He imposed the tracks …

First successful transmission of high-resolution dropwindsonde data from Hurricane Hunter aircraft

During a test flight on 31 July, the NOAA Aircraft Operations Center (AOC) released a dropwindsonde and transmitted the wind, pressure, temperature, and humidity data to the ground and around the world via the Global Telecommunications System.  Since the advent of dropsondes in the 1940s, only data from a few of the many observations could …

Paper on the new Doppler Wind Lidar on the NOAA Hurricane Hunters published in Remote Sensing

Summary: The warm ocean provides the energy for tropical cyclones to form and intensify. Knowing what is happening in the air immediately above this warm ocean (called the boundary layer) tells us how that energy gets into the air. So, it is important to know what is happening there to accurately predict how strong a …

Paper on calculating and using wind speed and direction from the new NASA CYclone Global Navigation Satellite System (CYGNSS) released online in the Journal of Atmospheric and Oceanic Technology

Summary:  The NASA CYclone Global Navigation Satellite System (CYGNSS) measures wind speed, but not direction, at the ocean surface. To test the impact of new observations before such a satellite system is launched, observations like those from the satellite are created from a weather model. This study uses these “simulated” observations to learn how to …

Paper on combining satellite data and data from the Global Hawk aircraft to improve forecasts published in Weather and Forecasting

Summary: Because satellites are observing the weather all the time, there are almost always satellite data available around hurricanes or tropical cyclones (TCs). On the other hand, Hurricane Hunter aircraft can only reach TCs when the storms are near land and when airplanes and crews are available. When Hurricane Hunter missions are planned, the regular …