danielwAdministrator
(Moderator)
Tue Nov 10 2009 08:39 AM
Re: Transition to extratropical?

With all due respect to Jim Cantore and all others...

Vortex message dew points are not totally indicative of whether the system is a Tropical, Extratropical or Hybrid system.
The spread of Temp inside eye versus dewpoint inside eye is more of a sign how the strom is performing.

Example from Major Hurricane Katrina in 2005 near peak intensity.

URNT12 KNHC 281825
VORTEX DATA MESSAGE
A. 28/1755Z
B. 26 DEG 20 MIN N
88 DEG 39 MIN W
C. 700 MB 2242 M
D. N/A
E. N/A
F. 140 DEG 160 KT
G. 050 DEG 22 NM
H. 902 MB
I. 14 C/ 3050 M
J. 29 C/ 3064 M
K. 6 C/ NA

L. CLOSED WALL
M. C25
N. 1234/7
O. 1/1 NM
P. NOAA3 1812A KATRINA OB 05
MAX FL WIND 160 KTS NE QUAD 1743Z
EXCELLENT RADAR PRESENTATION

Interpretation from tropicalatlantic.com decoder:

I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 14°C (57°F) at a pressure alt. of 3,050m (10,007ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 29°C (84°F) at a pressure alt. of 3,064m (10,052ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 6°C (43°F)



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