1. Collect and analyze data to observe intensity change at and after landfall.
2. Coordinate deployment of mobile platforms to best capture intensity and intensity
change at landfall.
3. Transmit Flight-level, remotely-sensed (Tail Doppler radar, SFMR and C-SCAT/IWRAP
winds) and near-surface observations (GPS sondes) to TPC for inclusion in H*Wind analyses
during landfall.
4. Generate windfields synthesized from the observations and use them to diagnose
intensity change processes at landfall.
Partners:
National Weather Service:
Colin MacAdie (Tropical Prediction Center) , Scott Spratt (NWS - Melbourne)
University and NSF-sponsored groups with mobile platforms:
Prof. John Schroeder (Texas-Tech U) , Prof. Kevin Knupp (U of Alabama-Huntsville),
Prof. Mike Biggerstaff (U of Oklahoma), Dr. Josh Wurman (Center for Severe Weather
Research) , Prof. Robert Howard (U of Louisiana at Monroe), Florida Coastal Monitoring
Program (FCMP): Prof. Tim Reinhold (Institute for Business and Home Safety), Prof. Kurtis
Gurley (U of Florida):, Prof. Forrest Masters (Florida International University)


accomplishments
Comprehensive data sets were collected in Hurricane Lili as it crossed the Louisiana
coast on 3 October, 2002, and in Hurricane Isabel on 18 September 2003, when it crossed the
North Carolina coast near Morehead City. These experiments included mobile deployments of
several Doppler radars and wind towers and NOAA research flights. The P3's collected Doppler
radar and GPS sonde data near the surface stations: In Isabel, the radar teams obtained
the first direct three-dimensional evidence of boundary-layer features (perhaps rolls), supported
by wind tower data.
The 2004 Hurricane Season was remarkable for the number of hurricanes that struck
Florida. The mobile tower and radar teams deployed in Hurricanes Charley (FCMP), Frances
(FCMP, TTU, OU, CSWR), Ivan (FCMP, TTU, OU, CSWR, University of Southern Alabama), and
Jeanne (FCMP). NOAA 43 flew tasked landfall missions in Hurricanes Frances, Ivan and Jeanne;
HRD scientists were on board to coordinate additional sonde drops along the coast near the
deployed ground teams and to quality-control the sonde and radar data. Analysis of the
landfall data are underway to better define the boundary layer wind features
observed in these storms.
In July 2005 HRD flew two missions in Hurricane Dennis as it made landfall in Alabama.
The second flight was notable because it was a post landfall flight designed to observe decay
after landfall. The second flight was almost entirely over land, and some radiosondes were
dropped over uninhabited areas inland. The combination of sonde and radar data should supply
PBL winds to compare against the Kaplan-DeMaria decay model, On 29 August 2005 NOAA 43
flew a mission in Hurrine Katrina as it made its destructive landfall first on the delta and then in
New Orleans. A key featyre of this flight was the ise of new UBLOX sondes that should after post
processing provide detailed wind profiles at the coast as well as inland. These data will also be
used to validate SFMT surface wind estimates. Mobile tower teams were deployed in both storms
as well.
Mission descriptions of these and earlier storms can be found in the storm data section of
the HRD web page (www.aoml.noaa.gov/hrd); these documents include maps with flight tracks
and mobile platform locations, lists of sondes deployed and sample radar images.

refs

Harasti, P. R., C. J. McAdie, P. P. Dodge, W. C. Lee, J. Tuttle, S. T. Murillo, F. D. Marks, Jr,
2003: Real-time implementation of single-Doppler analysis methods for tropical cyclones:
algorithm improvements and use with WSR-88D display data. Weather and Forecasting

Landsea, C. W., J. L. Franklin, C. J. McAdie, J. L. Beven II, J. M. Gross, B. R. Jarvinen, R. J.
Pasch, E. N. Rappaport, J. P. Dunion, and P. P. Dodge 2004: A Re-analysis of Hurricane
Andrew's (1992) Intensity. Bulletin of the American Meteorological Society.

Dodge, P. P., J. Gamache, E. Uhlhorn, D. Estaban and P. Chang, 2004: Onshore and Offshore
wind flow regimes at the landfall of Hurricane Isabel (2003) Preprints, 26th Conference on
Hurricanes and Tropical Meteorology, Miami Beach, FL, American Meteorological Society,
Boston, 564-565.

Dodge, P.P., M.L. Black, J.L. Franklin, J.F. Gamache, and F.D. Marks. 2002: High-resolution
observations of the eyewall in an intense hurricane: Bret on 21-22 August 1999. Preprints,
25th Conference on Hurricanes and Tropical Meteorology, San Diego, CA, American
Meteorological Society, Boston, 607-608

Howard, R., P. Dodge, A. Doggett, J. Finney, K. Gurley, M. Levitan , T. Reinhold, J. Schroeder,
G. Stone, 2003: The Landfall of Hurricane Lili in Louisiana: A Summary of Cooperative Data
Collection Efforts, International Conference on Wind Engineering, Lubbock, Texas