111 1 111 2 111 8 111 7 111 5 111 4 111 3 111 1 111 2 111 4 In Red Modified butterfly pattern oriented along shear vector Flown twice as storm translates northward typically at 1520 ID: 571261
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Slide1
Shear vector
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In Red:
Modified butterfly pattern oriented along shear vector
Flown twice as storm translates northward (typically at 15-20
kt
)
4-deg. Leg lengths that may be modified
In Green
Arched race-track pattern over left-of-shear region
Examines asymmetries, tilt, precession, bands of precipitation,
Examines initial impact of the midlatitude trough (relative angular momentum import, interaction between the decaying PV tower of the TC and the approaching upper-level midlatitude positive PV center.
Over Storm Mission during the Transformation Stage of Extratropical Transition
Duration: 21.2
h
Modified butterfly
pattern flown and arched race-track pattern flown at least twice
Hurricane Katia1733 UTC 8 SEP 201185 GHz color image with85 GHz PCT overlaidImagery courtesy of NRL-Monterey(http://www.nrlmry.navy.mil/TC.html)
Storm track, speed 15-17 kt
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6Slide2
Shear vector
111
1
111
2
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8
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7
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5
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4
Storm track, speed 15-17
kt
111
6
In Red:
Modified butterfly pattern oriented along shear vector
Flown twice as storm translates northward (typically at 15-20
k
4-deg. Leg lengths that may be modified
Hurricane Katia
1733 UTC 8 SEP 2011
GOES 13 Visible image with
85 GHz PCT overlaid.
Imagery courtesy of NRL-Monterey
(http://
www.nrlmry.navy.mil/TC.html
)
In GreenArched race-track pattern over left-of-shear region
Examines asymmetries, tilt, precession, bands of precipitation,Examines initial impact of the midlatitude trough (relative angular momentum import, interaction between the decaying PV tower of the TC and the approaching upper-level midlatitude positive PV center.
Over Storm Mission during the Transformation Stage of Extratropical Transition
Duration: 21.2 h Modified butterfly
pattern flown and
arched race-track pattern
flown at least twiceSlide3
Modified butterfly pattern oriented along shear vector
Flown following the TC
Typical translation speed ~15-20
kt
Approximately 20
h
4-deg. Leg lengths that may be modified
Arched race-track pattern over left-of-shear region
Examines asymmetries, tilt, precession, bands of precipitation,
Examines initial impact of the midlatitude trough (relative angular momentum import, interaction between the decaying PV tower of the TC and the approaching upper-level midlatitude positive PV center.
1733 UTC 8 Sep 2011
1101 UTC 9 Sep 2011
Over Storm Mission during the Transformation Stage of Extratropical Transition
Combined
Modified butterfly pattern and arched race-track
flown twice over an approximately 18-h periods
CIMSS Deep shear product0900 UTC 9 Sep 2011 Slide4
Environmental Mission during the the Extratropical Stage of Extratropical Transition
Figure 4
Examine remnant TC core structureExamine interaction with midlatitude trough to the northwest
Transition into a angled lawnmower pattern
Lawnmower pattern to examine interface between the decaying TC and midlatitude jet
Begin at eastern edge of figure 4Angle chosen to be perpendicular to outfloworientation related to contribution of TC-outflow to transverse ageostrophic
circulation and intensification of the upper-level jetorientation related to the “typical” Q-vector-derived forcing of Q-G frontogenesis
related to TC outflowAfter reaching point “X” fly the pattern in reverse (red segments) for time continuity.
2210 09 September 2011GOES 13 IR image85 GHz PCT overlaid