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 […]
Read the latest issue at http://www.aoml.noaa.gov/keynotes/PDF-Files/Sept-Oct2018.pdf
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
Summary: Though tropical cyclones (TCs) are usually hundreds of miles across, the strongest wind occurs in gusts that can be smaller than 100 yards across, or the size of a football field. We call features that cover such a small area the “turbulent scale.” Other features that are important in forecasting TCs can be as […]
