OB 21
Time: 1632Z
Position: 29.3 North // 74.5 West
Sea Level Pressure: 1009 mb
Surface wind speed and direction: 56 knots // 220
1000 millibar height: 79 meters
1000 millibar winds 52 knots // 215
925 millibar height: 762 meters
925 millibar winds: 73 knots // 230
850 millibar height: 1505 meters
850 millibar winds: 55 knots // 230
TS Franklin Recon Reports
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clfenwi wrote:OB 21
Time: 1632Z
Position: 29.3 North // 74.5 West
Sea Level Pressure: 1009 mb
Surface wind speed and direction: 56 knots // 220
1000 millibar height: 79 meters
1000 millibar winds 52 knots // 215
925 millibar height: 762 meters
925 millibar winds: 73 knots // 230
850 millibar height: 1505 meters
850 millibar winds: 55 knots // 230
56kts at the surface, which is about 64mph, and it may be farther away from the last drosponde from the center, judging by higher pressure reading.
Also 73kts at 925mb equates to about 66kts at the surface, which is about 76mph.
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374
URNT12 KNHC 231653
VORTEX DATA MESSAGE
A. 23/16:22:30Z
B. 29 deg 35 min N
074 deg 53 min W
C. 850 mb 1466 m
D. 65 kt
E. 135 deg 025 nm
F. 224 deg 060 kt
G. 135 deg 053 nm
H. 1001 mb
I. 16 C/ 1522 m
J. 20 C/ 1528 m
K. 17 C/ NA
L. NA
M. NA
N. 12345/ 8
O. 0.02 / 2 nm
P. AF304 0406A FRANKLIN OB 20
MAX FL WIND 62 KT SE QUAD 13:44:30 Z
URNT12 KNHC 231653
VORTEX DATA MESSAGE
A. 23/16:22:30Z
B. 29 deg 35 min N
074 deg 53 min W
C. 850 mb 1466 m
D. 65 kt
E. 135 deg 025 nm
F. 224 deg 060 kt
G. 135 deg 053 nm
H. 1001 mb
I. 16 C/ 1522 m
J. 20 C/ 1528 m
K. 17 C/ NA
L. NA
M. NA
N. 12345/ 8
O. 0.02 / 2 nm
P. AF304 0406A FRANKLIN OB 20
MAX FL WIND 62 KT SE QUAD 13:44:30 Z
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1605 2856N 07410W 01526 0088 223 059 158 102 060 01617 0000000000
1605. 2858N 07410W 01524 0087 225 057 160 108 060 01615 0000000000
Those were the max flight level winds on that pass
though note that the set of minobs from the area that the dropsonde was released from is not posted. There is a gap between
1608 2904N 07416W 01525 0079 225 051 162 152 052 01607 0000000000
and
1619. 2928N 07446W 01525 0024 218 044 158 158 049 01587 0000000000
However, since the dropsonde preceded passage through the center, it can be inferred from the vortex message that flight level winds were lower than 62 knots on that pass
1605. 2858N 07410W 01524 0087 225 057 160 108 060 01615 0000000000
Those were the max flight level winds on that pass
though note that the set of minobs from the area that the dropsonde was released from is not posted. There is a gap between
1608 2904N 07416W 01525 0079 225 051 162 152 052 01607 0000000000
and
1619. 2928N 07446W 01525 0024 218 044 158 158 049 01587 0000000000
However, since the dropsonde preceded passage through the center, it can be inferred from the vortex message that flight level winds were lower than 62 knots on that pass
Last edited by clfenwi on Sat Jul 23, 2005 12:10 pm, edited 2 times in total.
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Storm FRANKLIN: Observed By AF #304
Storm #06 in Atlantic Ocean0
Date/Time of Recon Report: 23/16:22:30Z
Position of the center: 29° 35' N 074° 53' W (29.6°N 74.9°W)
Minimum Height Measured At Standard Level Of 850mb: 1466m (Normal: 1457)
Surface Winds Were Estimated At: 65KT (74.75MPH 120.4km/h)
Estimated Surface Winds Were Measured 025nm (28.75miles) From Center At Bearing 135°
Maximum Flight Level Winds Near Center Were 060KT (69mph 111.1km/h) From 224°
Maximum Flight Level Winds Were Measured 053nm (60.9 miles) From Center At Bearing 135°
Minimum pressure: 1001mb (29.56in)
Eye Wall Characterization Not Reported
Eye Did Not Have A Definable Form or was not reported
Center Fix Established Using: Penetration Radar Wind Pressure Temperature
Center Fix Established At Level(s): 850mb
Navigational Accuracy Measured At 0.02nm
Meteorological Accuracy Measured At 2nm
Storm #06 in Atlantic Ocean0
Date/Time of Recon Report: 23/16:22:30Z
Position of the center: 29° 35' N 074° 53' W (29.6°N 74.9°W)
Minimum Height Measured At Standard Level Of 850mb: 1466m (Normal: 1457)
Surface Winds Were Estimated At: 65KT (74.75MPH 120.4km/h)
Estimated Surface Winds Were Measured 025nm (28.75miles) From Center At Bearing 135°
Maximum Flight Level Winds Near Center Were 060KT (69mph 111.1km/h) From 224°
Maximum Flight Level Winds Were Measured 053nm (60.9 miles) From Center At Bearing 135°
Minimum pressure: 1001mb (29.56in)
Eye Wall Characterization Not Reported
Eye Did Not Have A Definable Form or was not reported
Center Fix Established Using: Penetration Radar Wind Pressure Temperature
Center Fix Established At Level(s): 850mb
Navigational Accuracy Measured At 0.02nm
Meteorological Accuracy Measured At 2nm
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000
URNT12 KNHC 231716
VORTEX DATA MESSAGE
A. 23/17:04:10Z
B. 29 deg 41 min N
074 deg 48 min W
C. 850 mb 1460 m
D. 40 kt
E. 225 deg 013 nm
F. 307 deg 039 kt
G. 223 deg 022 nm
H. 1003 mb
I. 16 C/ 1526 m
J. 19 C/ 1519 m
K. 18 C/ NA
L. NA
M. NA
N. 12345/ 8
O. 0.02 / 2 nm
P. AF304 0406A FRANKLIN OB 25
MAX FL WIND 60 KT SE QUAD 16:05:10 Z
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Observation Number: 26
Time transmitted: 1716Z
Position: 29.7 North // 74.8 West
Sea Level Pressure: 1003 mb
Surface wind speed and direction: 6 knots // 150
1000 millibar height: 26 meters
1000 millibar winds: 6 knots // 155
925 millibar height: 715 meters
925 millibar winds: 3 knots // 160
850 millibar height: 1451 meters
850 millibar winds: 2 knots // 145
EYE
Time transmitted: 1716Z
Position: 29.7 North // 74.8 West
Sea Level Pressure: 1003 mb
Surface wind speed and direction: 6 knots // 150
1000 millibar height: 26 meters
1000 millibar winds: 6 knots // 155
925 millibar height: 715 meters
925 millibar winds: 3 knots // 160
850 millibar height: 1451 meters
850 millibar winds: 2 knots // 145
EYE
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OB 27
Time: 1714Z
Position: 29.9 North // 75.6 West
Flight Level: 1520 meters
FL Winds: 31 knots // 360
Temp/Dewpoint (C): 17/16
Weather: overcast
850 Millibar Height: 1535 meters
Surface winds: 25 knots // 330
URNT11 KNHC 231721
97779 17144 70299 75600 15200 36031 17163 /2535
43325
RMK AF304 0406A FRANKLIN OB 27
Time: 1714Z
Position: 29.9 North // 75.6 West
Flight Level: 1520 meters
FL Winds: 31 knots // 360
Temp/Dewpoint (C): 17/16
Weather: overcast
850 Millibar Height: 1535 meters
Surface winds: 25 knots // 330
URNT11 KNHC 231721
97779 17144 70299 75600 15200 36031 17163 /2535
43325
RMK AF304 0406A FRANKLIN OB 27
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cycloneye
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Next mission tonight after 2100z right?
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Visit the Caribbean-Central America Weather Thread where you can find at first post web cams,radars
and observations from Caribbean basin members Click Here
and observations from Caribbean basin members Click Here
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Lowpressure
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- Location: Charlotte, North Carolina
cycloneye wrote:Next mission tonight after 2100z right?
cycloneye, just a quick note to say thanks for all the timely recon and advisory data you have been posting. I bet you never thought you would be this busy in July, but we appreciate your effort. Thanks again my firend, great dedication to the hobby enthusiasts.
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cycloneye
- Admin
- Posts: 148501
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- Joined: Thu Oct 10, 2002 10:54 am
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Lowpressure wrote:cycloneye wrote:Next mission tonight after 2100z right?
cycloneye, just a quick note to say thanks for all the timely recon and advisory data you have been posting. I bet you never thought you would be this busy in July, but we appreciate your effort. Thanks again my firend, great dedication to the hobby enthusiasts.
Well thanks for those words but I dont do this alone as senorpepr,clfenwi do most of the recon data collection and they spend long hours doing that.And I spend many hours too doing the moderating work which is not an easy thing but I do the best I can to mantain the forum running smoothly.
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Visit the Caribbean-Central America Weather Thread where you can find at first post web cams,radars
and observations from Caribbean basin members Click Here
and observations from Caribbean basin members Click Here
-
Lowpressure
- S2K Supporter
- Posts: 2032
- Age: 58
- Joined: Sun Sep 14, 2003 9:17 am
- Location: Charlotte, North Carolina
cycloneye wrote:Lowpressure wrote:cycloneye wrote:Next mission tonight after 2100z right?
cycloneye, just a quick note to say thanks for all the timely recon and advisory data you have been posting. I bet you never thought you would be this busy in July, but we appreciate your effort. Thanks again my firend, great dedication to the hobby enthusiasts.
Well thanks for those words but I dont do this alone as senorpepr,clfenwi do most of the recon data collection and they spend long hours doing that.And I spend many hours too doing the moderating work which is not an easy thing but I do the best I can to mantain the forum running smoothly.
Good point, props as well to senorpepr and clfenwi, great work.
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From the discussion:
I could buy this if the flight level winds were close to the 850 mb wind reported by the dropsonde, but in the case that we can match up a dropsonde with the fl wind reported at the same position, there is a difference of several knots... which suggests that the dropsondes were observing gusts.
I am still miffed that the set of minobs that would have corresponded with the location of the dropsonde that had 73 knots at 925 mb never appeared. That would have helped asess the validity further.
AN 850 MB FLIGHT-LEVEL WIND OF 63 KT WAS
REPORTED ABOUT 50 NMI SOUTH OF THE CENTER AT 1543Z...AND SUBSEQUENT
DROPSONDE WIND PROFLIES ELSEWHERE SUGGEST THAT THE STANDARD 80
PERCENT REDUCTION FACTOR MAY BE TOO HIGH AND THAT USING 100 PERCENT
MAY BE MORE REPRESENTATIVE.
I could buy this if the flight level winds were close to the 850 mb wind reported by the dropsonde, but in the case that we can match up a dropsonde with the fl wind reported at the same position, there is a difference of several knots... which suggests that the dropsondes were observing gusts.
I am still miffed that the set of minobs that would have corresponded with the location of the dropsonde that had 73 knots at 925 mb never appeared. That would have helped asess the validity further.
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