50th Anniversary of Hurricane Debbie seeding

Hurricane Debbie’s eye as seen from ESSA DC-6 On August 18th and 20th, 1969, Hurricane Debbie was subjected to a seeding experiment as part of Project STORMFURY.  STORMFURY was a joint Navy and Environmental Science Services Administration (ESSA, the predecessor of NOAA) project to test the hypothesis that seeding hurricanes with silver iodide would disrupt … Continue reading 50th Anniversary of Hurricane Debbie seeding

2019 Hurricane Field Program Plan now available

One of the key aspects of NOAA’s Mission is, “To understand and predict changes in the climate, weather, oceans, and coasts...” with a long-term goal of achieving a, “Weather-ready Nation,” in which society is able to prepare for, and respond to, weather-related events. This objective specifies the need to improve the understanding and prediction of … Continue reading 2019 Hurricane Field Program Plan now available

HRD Seminar – Dr. Anthony Didlake, Pennsylvania State University – 11 February 2019

Prof. Didlake presented a seminar titled “Asymmetric aspects of secondary eyewall formation in tropical cyclones”. A recording of the presentation is available on the anonymous ftp site: ftp://ftp.aoml.noaa.gov/hrd/pub/blog/seminars/2019/Didlake_HRD_Seminar_20190211.mp4

30th Anniversary of Hurricane Gilbert

On September 16, 1988, Hurricane Gilbert made landfall at the Mexican city of La Pesca,Tamaulipas, with winds of 125 mph (200 km/hr).  It had already brought destruction upon the Yucatan peninsula and the Caribbean islands.  Along the way it set a new low-pressure record that would stand for 17 years. Gilbert was a classic Cape … Continue reading 30th Anniversary of Hurricane Gilbert

35th Anniversary of Hurricane Alicia

In the early morning hours of August 18, 1983, Hurricane Alicia made landfall at San Luis Pass, Texas, just southwest of the Galveston area.  Its 115 mph (185 km/hr) winds slammed the high rises of Houston leaving billions of dollars in damage in its wake. Like many tropical storms that form during low-activity years, Alicia … Continue reading 35th Anniversary of Hurricane Alicia

Paper on how eyewall replacement cycles start published in The Journal of the Atmospheric Sciences

Summary: When hurricanes become strong, they sometimes form a second eyewall around the main eyewall. This second ring of strong winds and heavy rain means that strong, damaging winds could cover a larger area than before. However, it also means that the storm might temporarily weaken. Understanding and predicting this process is therefore very important. … Continue reading Paper on how eyewall replacement cycles start published in The Journal of the Atmospheric Sciences