Mission Summary
20140704N1 Aircraft 49RF
Extratropical Transition Mission Hurricane Arthur

Aircraft Crew (49RF)
Aircraft CommanderRon Moyers
Co-pilotJason Mansour
Co-pilotDoug MacIntyre
Flight DirectorRich Henning
Flight DirectorShannon Hefferan
Data TechnicianJoe Greene
Data TechnicianGabe DeFeo
Dropsonde OperatorMike Mascaro
Dropsonde OperatorJeff Newnam
Scientific Crew (49RF)

Proposed NOAA 49 track

Actual NOAA 49 track

Mission Plan :

NOAA 49RF will conduct HRD-tasked Extratropical Transition mission into Hurricane Arthur as it was completing the transition just south of Cape Cod. The proposed flight pattern was for a butterfly pattern with three passes over the center of the storm.

Prepared by the Hurricane Research Division
July 03, 2014 1:53 PM
Aircraft: N49RF
Proposed takeoff: 04/1730Z
deg min deg min n mi/deg n mi n mi hh:mm
2S36 4273 30150/210 701.701. 1:37
3S41 1370 09150/030 314.1015. 2:21
4S39 0968 29150/090 146.1161. 2:42
5S39 1974 04120/270 260.1422. 3:18
6S40 5172 31100/330 116.1538. 3:35
7S37 2469 44150/150 244.1781. 4:09

Mission Summary :

Take off Landing
MacDill AFB, FL17:00 UTC MacDill AFB, FL23:10 UTC

Hurricane Arthur was undergoing extratropical transition as the mission began (Fig. 1). Convection was noticeably weaker than during the previous day, the eye had disappeared from satellite imagery, and dry air had moved into the southern semicircle of the storm. The cloud pattern was even more elongated in the north-south direction than during the previous day, and the convective maximum was shifting toward the left side of the storm.

During the first pass of the aircraft over the center of Arthur (Fig. 2), the Doppler radar was still sensing wind speeds of nearly 90 kt at 1-km altitude, suggesting that the system remained at hurricane strength. Also noteworthy is the elongation of the center toward the northwest at all levels. During the second pass (Fig. 3), the wind speeds remained at the same intensity , but the clongation of the center was proceeding rapidly with only a few strong wind vectors on the west side. Dropwindsonde data also shows the center elongation.

By the third pass (Fig. 4), the northwest side was recovering a bit, suggesting a halt to the transition, though some elongation of the center remained. The wind field was noticeably larger than during previous missions, an important part of the transformation during extratropical transition. 20 sondes were deployed.

Problems :


Mission Data :

Flight track

Temperature and Moisture

Wind and Atlitude

Flight Director's log | NetCDF data | 1 second data | serial data

Page last updated March 3, 2015
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