ATL : TROPICAL DEPRESSION BONNIE - RECON DISCUSSION

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Frank2
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#61 Postby Frank2 » Thu Jul 22, 2010 12:59 pm

I'm getting 958 feet for their operational altitude - that sounds too low, so perhaps my math is off (lol) or have left out an additional factor or two...
Last edited by Frank2 on Thu Jul 22, 2010 1:00 pm, edited 1 time in total.
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Re:

#62 Postby RL3AO » Thu Jul 22, 2010 1:00 pm

Frank2 wrote:I'm getting 958 feet for their operational altitude - perhaps my math is off (lol)...


About right. They are flying at around 300 meters.
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Re:

#63 Postby I-wall » Thu Jul 22, 2010 1:00 pm

Frank2 wrote:I'm getting 958 feet for their operational altitude - perhaps my math is off (lol)...

I got about the same thing. I think your math is good.
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#64 Postby Frank2 » Thu Jul 22, 2010 1:01 pm

Thanks - my rust is showing (lol) - it's like math class (without the teacher)...
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#65 Postby CrazyC83 » Thu Jul 22, 2010 1:05 pm

Already showing TS force SFMR winds. Pretty sure it is Tropical Storm Bonnie now.
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#66 Postby HURAKAN » Thu Jul 22, 2010 1:07 pm

CrazyC83 wrote:Already showing TS force SFMR winds. Pretty sure it is Tropical Storm Bonnie now.


and that's the dry side
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#67 Postby cycloneye » Thu Jul 22, 2010 1:07 pm

What is the reduction, 75% right?
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#68 Postby Dave » Thu Jul 22, 2010 1:09 pm

I can take hdobs and/or graphics anytime this afternoon, got the rest of the day off.
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#69 Postby CrazyC83 » Thu Jul 22, 2010 1:10 pm

cycloneye wrote:What is the reduction, 75% right?


90% for a low-level flight. Need 38 kt to support a tropical storm based on FL winds (should be easy IMO, SFMR is already there).
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#70 Postby tailgater » Thu Jul 22, 2010 1:11 pm

SMFR flag but 40 knts
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#71 Postby MWatkins » Thu Jul 22, 2010 1:12 pm

First drop near 23.7 75.3

Wonder if that was close to the flight center...
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Re:

#72 Postby RL3AO » Thu Jul 22, 2010 1:12 pm

Dave wrote:I can take hdobs and/or graphics anytime this afternoon, got the rest of the day off.


Go ahead. Its all yours.
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#73 Postby RL3AO » Thu Jul 22, 2010 1:16 pm

Well, recon found a west wind so we can confirm its a tropical cyclone. :lol:
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#74 Postby CrazyC83 » Thu Jul 22, 2010 1:16 pm

Based on Recon so far, the pressure is 1008mb and the winds are at least 35 kt.
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#75 Postby RL3AO » Thu Jul 22, 2010 1:19 pm

Recon flying at a mind-boggling 150 meters in altitude. :eek:
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#76 Postby MWatkins » Thu Jul 22, 2010 1:20 pm

If I am reading the HDOBs correctly...we should have a center near 22.1 75.0 or somewhere close to that spot.
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#77 Postby I-wall » Thu Jul 22, 2010 1:20 pm

Can someone point out to me which column is wind speed and which column is wind direction? Thanks.


180230 2217N 07512W 9913 00148 0083 +236 +143 025019 021 027 004 00
180300 2216N 07511W 9912 00150 0084 +233 +142 015017 020 029 003 00
180330 2215N 07510W 9914 00148 0084 +235 +141 011017 018 027 003 00
180400 2213N 07509W 9914 00147 0084 +235 +141 002014 015 025 003 00
180430 2212N 07508W 9914 00147 0083 +235 +142 345014 015 026 002 00
180500 2210N 07507W 9914 00148 0084 +235 +144 340015 015 025 003 00
180530 2209N 07506W 9914 00147 0084 +235 +147 336014 015 026 003 00
180600 2207N 07505W 9914 00147 0084 +235 +151 338013 014 024 004 00
180630 2206N 07504W 9911 00152 0084 +235 +154 326012 013 022 003 00
180700 2205N 07503W 9913 00148 0083 +236 +157 320012 013 023 002 00
180730 2203N 07502W 9912 00149 0083 +240 +160 306011 012 022 002 00
180800 2202N 07501W 9915 00146 0083 +236 +162 303010 011 021 002 00
180830 2201N 07501W 9914 00149 0085 +238 +164 299010 010 021 003 00
180900 2159N 07500W 9901 00161 0086 +239 +166 291010 010 021 001 00
180930 2158N 07459W 9910 00157 0089 +240 +167 279009 009 018 003 00
181000 2156N 07457W 9914 00155 0091 +241 +168 276009 010 021 002 00
181030 2154N 07456W 9911 00159 0093 +241 +170 272010 010 021 001 00
181100 2153N 07455W 9914 00158 0094 +242 +171 263011 012 023 001 00
181130 2151N 07454W 9915 00157 0095 +240 +173 271011 011 021 002 00
181200 2150N 07453W 9913 00159 0095 +243 +175 280011 011 016 005 00
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Re:

#78 Postby Comanche » Thu Jul 22, 2010 1:21 pm

RL3AO wrote:Recon flying at a mind-boggling 150 meters in altitude. :eek:


Are they trolling for Dorado or what??
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#79 Postby RL3AO » Thu Jul 22, 2010 1:22 pm

I-wall wrote:Can someone point out to me which column is wind speed and which column is wind direction? Thanks.


181200 2150N 07453W 9913 00159 0095 +243 +175 280011 011 016 005 00


Wind direction 280 degrees (or west)
Wind speed 011 knots
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Re: ATL : TROPICAL DEPRESSION THREE - RECON DISCUSSION

#80 Postby RattleMan » Thu Jul 22, 2010 1:26 pm

I-wall wrote:Can someone point out to me which column is wind speed and which column is wind direction? Thanks.


180230 2217N 07512W 9913 00148 0083 +236 +143 025019 021 027 004 00
180300 2216N 07511W 9912 00150 0084 +233 +142 015017 020 029 003 00
180330 2215N 07510W 9914 00148 0084 +235 +141 011017 018 027 003 00
180400 2213N 07509W 9914 00147 0084 +235 +141 002014 015 025 003 00
180430 2212N 07508W 9914 00147 0083 +235 +142 345014 015 026 002 00
180500 2210N 07507W 9914 00148 0084 +235 +144 340015 015 025 003 00
180530 2209N 07506W 9914 00147 0084 +235 +147 336014 015 026 003 00
180600 2207N 07505W 9914 00147 0084 +235 +151 338013 014 024 004 00
180630 2206N 07504W 9911 00152 0084 +235 +154 326012 013 022 003 00
180700 2205N 07503W 9913 00148 0083 +236 +157 320012 013 023 002 00
180730 2203N 07502W 9912 00149 0083 +240 +160 306011 012 022 002 00
180800 2202N 07501W 9915 00146 0083 +236 +162 303010 011 021 002 00
180830 2201N 07501W 9914 00149 0085 +238 +164 299010 010 021 003 00
180900 2159N 07500W 9901 00161 0086 +239 +166 291010 010 021 001 00
180930 2158N 07459W 9910 00157 0089 +240 +167 279009 009 018 003 00
181000 2156N 07457W 9914 00155 0091 +241 +168 276009 010 021 002 00
181030 2154N 07456W 9911 00159 0093 +241 +170 272010 010 021 001 00
181100 2153N 07455W 9914 00158 0094 +242 +171 263011 012 023 001 00
181130 2151N 07454W 9915 00157 0095 +240 +173 271011 011 021 002 00
181200 2150N 07453W 9913 00159 0095 +243 +175 280011 011 016 005 00


Here's a decoded version of that HDOB for your reference (self-made decoder):

Code: Select all

TIME        Latit.    Long.    Heading   Plane. Prs.   Height   Pressure   Temp   Dew Pt.   Dir, 30s mean   FL   FL SFC    SFMR   Precip   QC
18:02:30z   22°17'N   75°12'W   -------   991.3 hPa   148m   1008.3 hPa   23.6°C   14.3°C   25° @ 19kt     21kt   18.9kt   27kt   4mm   OK
18:03:00z   22°16'N   75°11'W   SE        991.2 hPa   150m   1008.4 hPa   23.3°C   14.2°C   15° @ 17kt     20kt   18kt   29kt   3mm   OK
18:03:30z   22°15'N   75°10'W   SE        991.4 hPa   148m   1008.4 hPa   23.5°C   14.1°C   11° @ 17kt     18kt   16.2kt   27kt   3mm   OK
18:04:00z   22°13'N   75°09'W   SE        991.4 hPa   147m   1008.4 hPa   23.5°C   14.1°C   2° @ 14kt     15kt   13.5kt   25kt   3mm   OK
18:04:30z   22°12'N   75°08'W   SE        991.4 hPa   147m   1008.3 hPa   23.5°C   14.2°C   345° @ 14kt     15kt   13.5kt   26kt   2mm   OK
18:05:00z   22°10'N   75°07'W   SE        991.4 hPa   148m   1008.4 hPa   23.5°C   14.4°C   340° @ 15kt     15kt   13.5kt   25kt   3mm   OK
18:05:30z   22°09'N   75°06'W   SE        991.4 hPa   147m   1008.4 hPa   23.5°C   14.7°C   336° @ 14kt     15kt   13.5kt   26kt   3mm   OK
18:06:00z   22°07'N   75°05'W   SE        991.4 hPa   147m   1008.4 hPa   23.5°C   15.1°C   338° @ 13kt     14kt   12.6kt   24kt   4mm   OK
18:06:30z   22°06'N   75°04'W   SE        991.1 hPa   152m   1008.4 hPa   23.5°C   15.4°C   326° @ 12kt     13kt   11.7kt   22kt   3mm   OK
18:07:00z   22°05'N   75°03'W   SE        991.3 hPa   148m   1008.3 hPa   23.6°C   15.7°C   320° @ 12kt     13kt   11.7kt   23kt   2mm   OK
18:07:30z   22°03'N   75°02'W   SE        991.2 hPa   149m   1008.3 hPa   24°C   16°C   306° @ 11kt     12kt   10.8kt   22kt   2mm   OK
18:08:00z   22°02'N   75°01'W   SE        991.5 hPa   146m   1008.3 hPa   23.6°C   16.2°C   303° @ 10kt     11kt   9.9kt   21kt   2mm   OK
18:08:30z   22°01'N   75°01'W   S         991.4 hPa   149m   1008.5 hPa   23.8°C   16.4°C   299° @ 10kt     10kt   9kt   21kt   3mm   OK
18:09:00z   21°59'N   75°00'W   SE        990.1 hPa   161m   1008.6 hPa   23.9°C   16.6°C   291° @ 10kt     10kt   9kt   21kt   1mm   OK
18:09:30z   21°58'N   74°59'W   SE        991.0 hPa   157m   1008.9 hPa   24°C   16.7°C   279° @ 9kt     9kt   8.1kt   18kt   3mm   OK
18:10:00z   21°56'N   74°57'W   SE        991.4 hPa   155m   1009.1 hPa   24.1°C   16.8°C   276° @ 9kt     10kt   9kt   21kt   2mm   OK
18:10:30z   21°54'N   74°56'W   SE        991.1 hPa   159m   1009.3 hPa   24.1°C   17°C   272° @ 10kt     10kt   9kt   21kt   1mm   OK
18:11:00z   21°53'N   74°55'W   SE        991.4 hPa   158m   1009.4 hPa   24.2°C   17.1°C   263° @ 11kt     12kt   10.8kt   23kt   1mm   OK
18:11:30z   21°51'N   74°54'W   SE        991.5 hPa   157m   1009.5 hPa   24°C   17.3°C   271° @ 11kt     11kt   9.9kt   21kt   2mm   OK
18:12:00z   21°50'N   74°53'W   SE        991.3 hPa   159m   1009.5 hPa   24.3°C   17.5°C   280° @ 11kt     11kt   9.9kt   16kt   5mm   OK

Max:   22°17'N   75°12'W   --------   991.5 hPa   161m   1009.5 hPa   24.3°C   17.5°C   19kt   21kt   18.9kt   29kt   5mm   --------
Min:   21°50'N   74°53'W   --------   990.1 hPa   146m   1008.3 hPa   23.3°C   14.1°C   9kt   9kt   8.1kt   16kt   1mm   --------
Avg:   -------   --------   --------   991.3 hPa   152m   1008.7 hPa   23.8°C   15.7°C   12kt   13kt   12kt   23kt   3mm   --------
        Latit.    Long.    Heading    Plane. Prs.   Height   Pressure   Temp   Dew Pt.   Mean   FL   FL SFC    SFMR   Precip   QC



The "heading" column is my own creation and not part of the HDOB but derived from the coordinates and is a rough estimate. FL SFC is also not part of the HDOB, but is derived from FL. Max, min, and average are added for convenience.
Last edited by RattleMan on Thu Jul 22, 2010 2:01 pm, edited 8 times in total.
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