Mission Summary
20101104I1 Aircraft 43RF
TDR Mission Summary
Tropical Storm Tomas

Aircraft Crew (43RF)
Aircraft CommanderMark Nelson
Co-pilotHarris Halverson
Co-pilotMark Sweeny
Flight EngineerDewie Floyd
Flight EngineerPaul Darby
NavigatorChris Sloan
Flight DirectorBarry Damiano
System EngineerDana Naeher
Data TechnicianMike Mascaro
Dropsonde OperatorJeff Smith
Crew ChiefKevin Rotteveel
Scientific Crew (43RF)
Lead ScientistSim Aberson
Radar ScientistJohn Gamache
Dropsonde ScientistTomislava Vukicevic
Cloud Physics ScientistTerry Lathem (GeorgiaTech)

Mission Plan :

N43RF is scheduled to fly an EMC-tasked Tail Doppler Radar mission into Tropical Storm Tomas in the Central Caribbean Sea. Takeoff at 0800 UTC 04 November from MacDill. The plan is to go around the east side of Cuba and approach Tomas from the north. A figure-4 with 90-nm legs will be performed, leaving the aircraft on the west side of the storm. A final pass through the center from west to east is performed before recovery in St. Croix.

Mission Summary :

Take off Landing
MacDill AFB, FL 04/08:00UTC St. Croix, USVI 04/15:30 UTC

Figure 1. Dropwindsonde/Doppler radar composite at 0.5 km altitude from 20101104I1 flight into Tomas.
The mission was fully successful with 7 dropwindsondes released at the endpoints and in the center, and three radar analyses sent. Also very successful was a test of getting the radar data sent directly from the aircraft to NCEP/NCO. The satellite presentation of Tomas was not improving, but the pressure was dropping slowly before and during the flight. Tomas remained a weak tropical storm under low shear, but was not strengthening as expected. Radar composites showed an interesting structure at low levels (Fig. 1), with a very small core with a radius of maximum wind speeds of about 20 km, and an outer core with stronger winds extending more than 150 km away from the center. Strongest winds at the lowest level were in the 40-50-kt range suggesting that the initial intensity of 45 kt from NHC was a little high.

Figure 2: As in Fig. 1, but at 2.5 km altitude.

The inner wind speed maximum disappeared by 2.5 km altitude (Fig. 2), and the well-defined wind center disappeared by 4 km altitude (Fig. 3). All levels showed the convective asymmetry of the storm, with nearly all reflectors on the east side. No large shear was evident in the Doppler.

Figure 3: As in Fig. 1, but at 4 km altitude.

Problems :

There were some radar problems early in the flight that the engineers were able to fix. Otherwise, the flight was uneventful.

Mission Data :

LPS forms | Radar forms | Dropsonde forms
Serial data | 1 second data | NetCDF data | SFMR (NetCDF) data |

Flight track

Temperature and Moisture

Wind and Atlitude

Flight track

Page last updated February 22, 2011
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