Jeanne Vortex 0239 UTC

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PurdueWx80
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Jeanne Vortex 0239 UTC

#1 Postby PurdueWx80 » Fri Sep 24, 2004 10:26 pm

000
URNT12 KNHC 250239
VORTEX DATA MESSAGE
A. 25/0239Z
B. 26 DEG 24 MIN N
74 DEG 51 MIN W
C. 850 MB 1088 M
D. NA
E. NA
F. 324 DEG 110 KT
G. 230 DEG 19 NM
H. 964 MB
I. 18 C/ 1533 M
J. 20 C/ 1544 M
K. 20 C/ NA
L. CLOSED WALL
M. C45
N. 12345/8
O. 0.1/1 NM
P. AF968 1911A JEANNE OB 08
MAX FL WIND 110 KT SW QUAD 0233Z.
MDT TURBC IN EYEWALL.
Last edited by PurdueWx80 on Fri Sep 24, 2004 10:31 pm, edited 1 time in total.
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Derek Ortt

#2 Postby Derek Ortt » Fri Sep 24, 2004 10:28 pm

flight level was 850mb, not the usual 700mb. Maximum surface winds are 88KT
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weatherlover427

#3 Postby weatherlover427 » Fri Sep 24, 2004 10:28 pm

Uh oh. :eek:
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Anonymous

#4 Postby Anonymous » Fri Sep 24, 2004 10:29 pm

I thought dry air was weakening it?
Last edited by Anonymous on Fri Sep 24, 2004 10:30 pm, edited 1 time in total.
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#5 Postby tallywx » Fri Sep 24, 2004 10:30 pm

Still south of 26.5N (actually 26.4N). The due west continues...
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#6 Postby tallywx » Fri Sep 24, 2004 10:30 pm

Still south of 26.5N (actually 26.4N). The due west continues...
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#7 Postby PurdueWx80 » Fri Sep 24, 2004 10:30 pm

Derek, how does the flight level to surface conversion work when they are closer to the surface?
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#8 Postby Sanibel » Fri Sep 24, 2004 10:30 pm

No doubt an intensification phase. Probably 105mph...

(SW Quad)
Last edited by Sanibel on Fri Sep 24, 2004 10:34 pm, edited 1 time in total.
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Derek Ortt

#9 Postby Derek Ortt » Fri Sep 24, 2004 10:32 pm

90 percent of the 700mb winds
80 percent of the 850mb winds
75 percent of the 925mb winds
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#10 Postby cvalkan4 » Fri Sep 24, 2004 10:41 pm

That seems backwards. If the flight level is closer to the surface, the measured flight level winds should be closer to the surface winds.
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Derek Ortt

#11 Postby Derek Ortt » Fri Sep 24, 2004 10:43 pm

in a tropical cyclone, the strongest winds are only a few hundred meters just above the surface, unlike in a non-trop where they are aloft
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#12 Postby calidoug » Fri Sep 24, 2004 10:46 pm

Edit
Last edited by calidoug on Fri Sep 24, 2004 10:49 pm, edited 1 time in total.
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#13 Postby cvalkan4 » Fri Sep 24, 2004 10:47 pm

Got it. Thanks!

And thanks for your forecasts -- they have been very helpful.
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#14 Postby tallywx » Fri Sep 24, 2004 10:52 pm

calidoug wrote:That's backwards alright.

If the flight-level winds are measured at a higher pressure = closer to the surface, you don't decrease them MORE to get surface winds, but less.


Nope.

Take a look at this wind profile from Hurricane Mitch.

Image

Notice how at the surface, his winds are 165 mph. Just above the surface, they increase to 185 mph.

Then notice how (taking out all the bumps), the wind slowly DECREASES with increasing height.
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#15 Postby MWatkins » Fri Sep 24, 2004 10:56 pm

HARDLY 26.5. Closer to 26.4...and that's at a time when the eye appeared to be moving north to some.

MW
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#16 Postby Guest » Fri Sep 24, 2004 10:59 pm

000
URNT12 KNHC 250239
VORTEX DATA MESSAGE
A. 25/0239Z
B. 26 DEG 24 MIN N
74 DEG 51 MIN W
C. 850 MB 1088 M
D. NA
E. NA
F. 324 DEG 110 KT
G. 230 DEG 19 NM
H. 964 MB
I. 18 C/ 1533 M
J. 20 C/ 1544 M
K. 20 C/ NA
L. CLOSED WALL
M. C45
N. 12345/8
O. 0.1/1 NM
P. AF968 1911A JEANNE OB 08
MAX FL WIND 110 KT SW QUAD 0233Z.
MDT TURBC IN EYEWALL.

Isnt 26 DEG 24 suppose to be closer to 26.3 than 26.5
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#17 Postby Tertius » Fri Sep 24, 2004 11:04 pm

redorangeglow wrote:000
URNT12 KNHC 250239
VORTEX DATA MESSAGE
A. 25/0239Z
B. 26 DEG 24 MIN N
74 DEG 51 MIN W
C. 850 MB 1088 M
D. NA
E. NA
F. 324 DEG 110 KT
G. 230 DEG 19 NM
H. 964 MB
I. 18 C/ 1533 M
J. 20 C/ 1544 M
K. 20 C/ NA
L. CLOSED WALL
M. C45
N. 12345/8
O. 0.1/1 NM
P. AF968 1911A JEANNE OB 08
MAX FL WIND 110 KT SW QUAD 0233Z.
MDT TURBC IN EYEWALL.

Isnt 26 DEG 24 suppose to be closer to 26.3 than 26.5


Not quite. Since there are 24 minutes in a degree to convert it to decimal it becomes 26 degrees and 24/60, or 26.40 degress N latitude.
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#18 Postby Brent » Fri Sep 24, 2004 11:26 pm

Interesting.

:eek:
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