Paper on the types and sizes of ice particles in hurricanes released online in the Journal of Applied Meteorology and Climatology

Many people have experienced the heavy rain and warm, moist air when hurricanes reach land. But several miles above the ground, where the air is very cold, hurricane clouds are made up of snowflakes and tiny ice particles called ice crystals. The computers that scientists use to forecast where hurricanes will go and how strong […]

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HRD Seminar – Dr. Jon Poterjoy, HRD/NRC – Post-Doc Fellow – 30 March 2017

Dr. Poterjoy presented a seminar on “Progress and Lessons Learned During a Six-Month Collaboration with NOAA NSSL on Convective-Scale Data Assimilation”. ABSTRACT The nonlinear evolution of model forecast errors in convective weather regimes presents a major obstacle for predicting severe weather events. Ensemble forecasts provide an effective means of characterizing this uncertainty, which is a crucial step […]

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Paper on the bumpy ride encountered by Hurricane Hunters in Hurricane Felix released online in Monthly Weather Review

On September 2, 2007, a National Oceanic and Atmospheric Administration Hurricane Hunter airplane flew into Hurricane Felix when it was a category-5 hurricane north of Venezuela. The aircraft measured wind speed of 163 kt (188 mph) at the ocean surface and an upward wind speed of 60 kt (69 mph), the fastest upward wind ever […]

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105th Anniversary of the SS Koombana disaster

On 20 March, 1912, the passenger, cargo, and mail-carrying ship SS Koombana encountered a tropical cyclone off Western Australia, killing 74 passengers and 76 crew members. Most of the tale is known from the captain of the SS Bullarra that survived the disaster.  Despite a falling barometer and a strong northeasterly wind, the Koombana departed Port Hedland […]

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New and Improved SFMR data set

The technique to process data from the Stepped Frequency Microwave Radiometer (SFMR), which observes surface wind speeds and rain rates within tropical cyclones, was upgraded prior to the 2015 hurricane season on all NOAA and Air Force Reserve Command hurricane reconnaissance aircraft. The processing method improves the observations across all wind speeds and rain rates. Brad […]

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HRD Monthly Science Meeting of March 2017

March’s science meeting consisted of 2 presentations: Lisa Bucci: P3DWL Observation Verification Jonathan Poterjoy: Getting the Most Out of Your Models and Observations: A Short Introduction to My Work All the presentations are available on the anonymous ftp site at: ftp://ftp.aoml.noaa.gov/hrd/pub/blog/meetings/2017/Science/HRD_SciMeet_20170309.zip

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HRD Seminar – Prof. John Molinari, University of Albany/SUNY – 7 March 2017

Prof. Molinari presented a seminar on “Outflow Layer Influences on Tropical Cyclones”. A recording of the presentation (audio begins 1 min into recording) is available on the anonymous ftp site: ftp://ftp.aoml.noaa.gov/hrd/pub/blog/seminars/2017/Molinari_HRD_Seminar_20170307.mp4

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