Summary: When tropical cyclones move out of the tropics toward the poles, they reach areas where fronts exist and where the ocean, whose warm water fuels tropical storms, is relatively cool. When this happens, the storms go through extratropical transition (ET) and become like other storms in the mid latitudes. The storms can cause catastrophic […]
HRD researchers discussed the results from the two P-3 and one Global Hawk mission into Hurricane Franklin (8-9 August 2017). The agenda for the discussion was: Mission Overview (Reasor) Science Discussions 20170808H1 (Zawislak) 20170809H1 (Rogers) EMC input (Sippel) Additional field program issues Slides from the debrief are available at: ftp://ftp.aoml.noaa.gov/pub/hrd/blog/meetings/2017/HFP/franklin17_debrief_main.pptx
Summary: Sometimes, the wind at the surface around a hurricane is the same around the storm center (what we call a symmetric pattern), and at other times, it is different (what we call an asymmetric pattern). In addition, sometimes the wind pattern stays the same, and sometimes it changes quickly. This study looks at how […]
If you use HRD’s data, NOAA/AOML’s Hurricane Research Division (HRD) invites feedback on your experiences obtaining and using data sets provided by HRD (a list of available products can be found at http://www.aoml.noaa.gov/hrd/data_sub/products.html). We value your time in filling out this important survey, as it will provide critical guidance for HRD scientists as we seek […]
August’s science meeting consisted of 5 presentations: Jason Sippel: “Examining impact of recon in operational HWRF” Steve Diaz: “Demonstration of solver-independent regridding operation for a moving hurricane nest” Joe Cione: “Infrared Sea Surface Temperature Measurements from Hurricane Edouard (2014) using GPS dropsondes” John Kaplan: “Hurricane Franklin (2017): A Preliminary Look from a Global Hawk-P3 Perspective” […]
For the first time, data from mini-dropwindsondes released by the Global Hawk aircraft were used by NOAA Global Forecast System to predict where Franklin might track, how strong it would get, and other weather around the globe. A total of 48 mini-dropsondes were released by the Global Hawk on the morning and afternoon of 9 […]
OPERATIONS Wednesday, 9 Aug. 2017 G-IV: No flights are scheduled. NOAA42: Is flying a Tail Doppler Radar mission into Tropical Storm Franklin. Take off was around 0800 UTC (4:00AM Eastern) from Lakeland Linder Regional Airport, Lakeland, FL. Three HRD scientists are on this flight. Global Hawk: Is currently flying over Tropical Storm Franklin and scheduled to land […]
The flight and science crew are up early and ready for their second flight into Franklin. NOAA P3 Hurricane hunter aircraft will take off at 4AM Eastern (0800 UTC) from Lakeland Linder Regional Airport, Lakeland, FL for a seven-hour mission. The data from this flight will go into the weather forecast models. Below is the proposed […]
As part of NASA’s East Pacific Origins and Characteristics of Hurricanes (EPOCH) field campaign, the Global Hawk is scheduled to fly tonight for a 22-h mission over Tropical Storm Franklin. The Global Hawk will take off at 7PM Pacific (10PM Eastern) from NASA’s Armstrong Research Flight Facility, in Edwards, CA. Here is the proposed flight track […]
Summary: Hurricane Hunter aircraft have been releasing instruments called dropwindsondes to measure pressure, temperature, moisture, and wind speed and direction in hurricanes for two decades. Data from dropwindsondes released near the storms have led to better forecasts of where they will go, but improvements to forecasts of how strong they will get have lagged. Part […]
