Study on improvements to NOAA’s hurricane forecast model and the way it predicts the region closest to the surface published in Weather and Forecasting

We modified the way NOAA’s new hurricane model forecasts what happens in the lowest part of the atmosphere based on observations from Hurricane Hunter research flights. The new scheme produced track forecasts that were up to 20% better than from the older scheme, a 15% improvement in detection of rapid intensification events, and smaller tropical … Continue reading Study on improvements to NOAA’s hurricane forecast model and the way it predicts the region closest to the surface published in Weather and Forecasting

Gopal presents work on model boundary-layer schemes to the HFIP bi-weekly meeting

Sundararaman "Gopal" Gopalakrishnan reported recent work on boundary-layer parameterization schemes in hurricane models at the 5 August bi-weekly Hurricane Forecast Improvement Program meeting. The hurricane boundary layer is the area of the atmosphere closest to the ocean air where the energy in the form of heat and moisture from the warm ocean is transferred to … Continue reading Gopal presents work on model boundary-layer schemes to the HFIP bi-weekly meeting

35th anniversary of the publication first documenting the eyewall cycle in intense tropical cyclones

In February, 1982, The Journal of the Atmospheric Sciences published a ground-breaking study by Hugh Willoughby, Jean Clos, and Mohammed Shoreibah on what became to be known as the eyewall replacement cycle.  Using data obtained from NOAA P3 flights into very intense Hurricanes Anita, David and Allen, they found that a common feature of intense … Continue reading 35th anniversary of the publication first documenting the eyewall cycle in intense tropical cyclones

HRD observation team monthly meeting – 16 June 2016

The purpose of the observation team meetings is to bring together the people who use observations in their research on a regular basis to discuss issues they’re having, provide updates on observations they’re analyzing or collecting, and any other information that may be of interest to the broader group.  These meetings are also an excellent … Continue reading HRD observation team monthly meeting – 16 June 2016

35th Anniversary of Hurricane Allen

  Early on the morning of August 10, 1980, major Hurricane Allen roared ashore over Brownsville, Texas.  A classic Cape Verde hurricane, Allen had cut a path across the Caribbean Sea and Gulf of Mexico over the previous six days, to become one of the landmark storms of the era.  It was also provided a … Continue reading 35th Anniversary of Hurricane Allen