HRD Seminar – Dr. Dave Raymond, New Mexico Institute of Mining and Technology – 12 December 2018

Prof. Raymond presented a seminar titled “Control of Convection in High-Resolution Simulations of Tropical Cyclogenesis”. ABSTRACT: Three idealized high-resolution simulations of tropical storm formation from a weak vortex are analyzed. The three simulations include a case using warm rain microphysics, a case in which surface friction is omitted, and a case in which ice microphysics … Continue reading HRD Seminar – Dr. Dave Raymond, New Mexico Institute of Mining and Technology – 12 December 2018

Greater Miami AMS Chapter/HRD Seminar – Brian McNoldy, University of Miami/RSMAS – 10 December 2018

The Greater Miami Chapter of the American Meteorological Society (AMS) held their meeting Monday, December 10, 2018 at the AOML Laboratory.  The featured speaker was Brian McNoldy, University of Miami /RSMAS Senior Research Associate and Capital Weather Gang Tropical Meteorologist. Brian presented a seminar on “The 2018 Hurricane Season in Review”. A copy of the … Continue reading Greater Miami AMS Chapter/HRD Seminar – Brian McNoldy, University of Miami/RSMAS – 10 December 2018

Paper on the Doppler Wind Lidar, a new instrument to measure wind from hurricane hunter aircraft, published in the journal Sensors

Summary: A new instrument, called an airborne Doppler Wind Lidar (ADWL, for short), was flown on NOAA’s hurricane hunter aircraft into two storms during 2016. This instrument measures winds above and below the plane. The ADWL measures wind where radar on the aircraft cannot: the radar can measure the wind where there are clouds or … Continue reading Paper on the Doppler Wind Lidar, a new instrument to measure wind from hurricane hunter aircraft, published in the journal Sensors

Paper on the tropical cyclone diurnal cycle as seen in a forecast model released online in Monthly Weather Review

Summary: As tropical cyclones (TCs) move across the oceans, they begin to expand each day around sunset, with clouds reaching hundreds of miles from the center by the following afternoon. This daily “exhale” of the clouds is a feature of what we call the TC diurnal cycle. This study looks at the this cycle in … Continue reading Paper on the tropical cyclone diurnal cycle as seen in a forecast model released online in Monthly Weather Review

Paper on a new way to input observations into weather models released online in Monthly Weather Review

Summary:  Predicting the weather with 100% accuracy is an impossible task. Doing so would require full knowledge of the Earth system (the air, water, land, etc.) including the present state of the atmosphere (its wind, temperature, humidity, etc.). It would also require a complete understanding of everything that causes the weather. In reality, our understanding … Continue reading Paper on a new way to input observations into weather models released online in Monthly Weather Review

Paper on possible improvements to forecasts from additional radio-occultation satellite data published in Monthly Weather Review

Summary: The Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) are a set of satellites that were launched in 2006 and orbit the earth about 500 miles above ground. They use radio signals from Global Positioning System (GPS) satellites in a process called “radio occultation” to measure temperature and moisture with high accuracy every 100 … Continue reading Paper on possible improvements to forecasts from additional radio-occultation satellite data published in Monthly Weather Review

Paper on a new way to assess how well model forecasts are doing, showing improvements since 2015, published in Weather and Forecasting

Summary:  Forecasters use computer models to help predict the weather.  One important and simple way to see how good the computer forecasts are is to check how good predictions of where the high and low pressure systems are at a level about 5.5 km (3.5 miles) above the surface of the earth. But this doesn't … Continue reading Paper on a new way to assess how well model forecasts are doing, showing improvements since 2015, published in Weather and Forecasting

Paper on the impact of using Hurricane Hunter data in the HWRF model published in Monthly Weather Review

We studied how Hurricane Hunter aircraft observations can improve tropical cyclones forecasts from the National Oceanic and Atmospheric Administration's Hurricane Weather Research and Forecast (HWRF) model. Important Conclusions: Hurricane Hunter aircraft data generally improve HWRF forecasts. These improved forecasts are mainly in weak storms, since, without the data, HWRF often forecast storms that are too … Continue reading Paper on the impact of using Hurricane Hunter data in the HWRF model published in Monthly Weather Review

HRD Seminar – Dr. Yair Cohen, California Institute of Technology – 13 November 2018

Dr. Cohen presented a seminar titled “Gradient Non-Balance: A new approach for the outflow at the top of Tropical Cyclones: Theory, models and observations". ABSTRACT: The gradient non-balance is a flow-regime in which the gradient wind balance has no solutions or a given pressure map. This occurs only around a high pressure center, when the … Continue reading HRD Seminar – Dr. Yair Cohen, California Institute of Technology – 13 November 2018