Summary: NOAA Hurricane Hunter aircraft have a Doppler radar that measures wind through the entire hurricane. We analyzed these radar data collected in many hurricanes since 2004. Previous studies found that the location of the fastest upward moving air (what we call updrafts) may tell us how strong the storm will be a few hours […]
On May 2, 2008 Very Severe Cyclone Nargis made landfall in Burma (Myanmar). The cyclone struck the delta of the Irrawaddy River with JTWC-estimated winds of 135 mph (117 kt, 60 m/s), sending a storm surge some 40 km inland and causing nearly 140,000 deaths. By some calculations this makes Nargis the seventh deadliest cyclone in the North Indian […]
Starting in 1996, NOAA phased out use of the obsolete Omega DropWindsondes (ODW) in favor of the Global Positioning Satellite (GPS) Dropwindsondes. In addition to being more accurate due to the superior navigation system, this next-generation sonde was also more moisture tolerant. ODWs would fail in they were launched in areas of heavy rain, but […]
Summary: Almost all weather forecasts for times longer than a few hours in the future are made using complicated computer apps working together on the largest computers. This is known as numerical weather prediction, or NWP for short. One of the most important NWP apps takes all kinds of data and mixes them together to […]
You can read the paper at https://journals.ametsoc.org/doi/full/10.1175/JPO-D-17-0195.1.
April’s science meeting consisted of five presentations: Andrew Kren – Impact of Global Hawk dropsonde data assimilated in the NCEP GFS model during SHOUT: Hurricanes Matthew and Nicole in 2016 Hui Christophersen – Impact of Global Hawk Dropsondes on Tropical Cyclone Analyses and Forecasts Sim Aberson – 1-km HEDAS analysis of Hurricane Patricia just after peak […]
Dr. Kepert presented a seminar titled “Bias correction of tropical cyclone size and structure in the ECMWF global ensemble prediction system”. ABSTRACT: Global EPS systems provide very valuable warning of severe weather risk, including tropical cyclones. One limitation arises because the spatial resolution of the EPS is necessarily too coarse to capture the fine details […]
The Best Student Poster for Mesoscale Meteorology Award at the AMS 33rd Hurricane and Tropical Meteorology Conference was awarded to University of Utah student George (Trey) Alvey III and co-authored by HRD’s Rob Rogers and Jon Zawislak along with U. Utah Professor Ed Zipser. The poster was titled “Hurricane Edouard’s (2014) Intensification: The Relationship between […]
HRD’s Jason Dunion, along with colleagues Chris Thorncroft, and Chris Velden, were presented with the prestigious Banner I. Miller Award at the AMS’s 33rd Hurricane and Tropical Meteorology Conference for their paper “The tropical cyclone diurnal cycle of mature hurricanes”. The work was cited for “identifying a fundamental process in tropical cyclones and elegantly defining […]
The workshop focused on exchanging lessons-learned and best practices within current NOAA and related testbeds/proving grounds, and on building cross-testbed collaborations. The workshop featured an integrating-science theme session on transition testing conducted at the NOAA Testbeds & Proving Grounds towards the 2019 operational launch of NOAA’s Next Generation Global Prediction Model. Updates on the wide […]
