Franklin Advisories
Moderator: S2k Moderators
THEREFORE...THE DEPRESSION COULD REACH
HURRICANE STRENGTH WITHIN 48 TO 72 HOURS.
Okay... if this thing's going to be slow moving and loop around basically the same area, won't it be causing upwelling? that would affect it's strengthening, right? or is the heat content of water in that area such that it would support strengthening despite slow speed and lingering?
(i'm full of questions!

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- cycloneye
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Look at the forecast loop.
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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
The NHC issues a discussion at 5AM, 11AM, 5PM, and 11PM to explain the forecast track and stuff.joseph01 wrote:Wouldn't it be nice to be a fly on the wall at NHC and know exactly what that loopy forcast track is based on?
Here is their reasoning...
"THE FORECAST TRACK IS SOMEWHAT PROBLEMATIC.
THE GLOBAL MODELS TAKE THE SURFACE TO 850 MB CIRCULATION NORTHWARD
AND THEN RECURVE IT NORTHEASTWARD THROUGH THE SUBTROPICAL RIDGE.
HOWEVER...ALL OF THE MODELS GENERALLY AGREE THAT THE MID-LEVEL/500
MB CIRCULATION WILL MOVE INTO THE RIDGE AXIS AND STALL IN ABOUT 48
HOURS AS A SHORTWAVE TROUGH MOVES NORTHEAST OF THE DEPRESSION AND
ALLOWS THE RIDGE TO BUILD BACK IN TO THE WEST."
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- johngaltfla
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Can't wait to see this one track out... They might pin this one, but laying the groundwork for lots of speculation already... As well they should, if the models are doing this to 'em, what else could they do...
"Discussion Blog: The models all disagree, and so do we. This thing may or may not strengthen, and may or may not do a full loop in the next five days. The blob of uncertainty currently predicted has just about eaten our brains, so we would like to all go home over the weekend and have a stiff drink before we release this on the masses. We'll clean all the viruses out of the FSU computers, and get back to you on this TD 6..." Forecaster Stewart/and the brain eating puter gremlins that seeded the clouds to form this mess...
Heheeeee
"Discussion Blog: The models all disagree, and so do we. This thing may or may not strengthen, and may or may not do a full loop in the next five days. The blob of uncertainty currently predicted has just about eaten our brains, so we would like to all go home over the weekend and have a stiff drink before we release this on the masses. We'll clean all the viruses out of the FSU computers, and get back to you on this TD 6..." Forecaster Stewart/and the brain eating puter gremlins that seeded the clouds to form this mess...
Heheeeee

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gkrangers wrote:The NHC issues a discussion at 5AM, 11AM, 5PM, and 11PM to explain the forecast track and stuff.joseph01 wrote:Wouldn't it be nice to be a fly on the wall at NHC and know exactly what that loopy forcast track is based on?
Here is their reasoning...
"THE FORECAST TRACK IS SOMEWHAT PROBLEMATIC.
THE GLOBAL MODELS TAKE THE SURFACE TO 850 MB CIRCULATION NORTHWARD
AND THEN RECURVE IT NORTHEASTWARD THROUGH THE SUBTROPICAL RIDGE.
HOWEVER...ALL OF THE MODELS GENERALLY AGREE THAT THE MID-LEVEL/500
MB CIRCULATION WILL MOVE INTO THE RIDGE AXIS AND STALL IN ABOUT 48
HOURS AS A SHORTWAVE TROUGH MOVES NORTHEAST OF THE DEPRESSION AND
ALLOWS THE RIDGE TO BUILD BACK IN TO THE WEST."
Thank you for that, gkrangers. They have indeed explained the circumstances. I was just wondering about when they throw in with the models, and when they depart, based on experience, personal assessment, and gut feeling. My understanding is that they do not just regurgitate model data. Am I wrong in this thinking?
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The ciruation is becoming better defined by the minute. In there is some pop corn convection starting to form over the center. So that is a sign that the system is starting to form its own convection. A line of clouds pushing eastward to the west or west-southwest, has me wondering if that is shear?
http://www.cira.colostate.edu/ramm/rmsd ... PICAL.html
http://www.cira.colostate.edu/ramm/rmsd ... PICAL.html
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They use model data, climatology, recon data, surface observations, upper air obs, and their own experience. It all goes into it.joseph01 wrote:gkrangers wrote:The NHC issues a discussion at 5AM, 11AM, 5PM, and 11PM to explain the forecast track and stuff.joseph01 wrote:Wouldn't it be nice to be a fly on the wall at NHC and know exactly what that loopy forcast track is based on?
Here is their reasoning...
"THE FORECAST TRACK IS SOMEWHAT PROBLEMATIC.
THE GLOBAL MODELS TAKE THE SURFACE TO 850 MB CIRCULATION NORTHWARD
AND THEN RECURVE IT NORTHEASTWARD THROUGH THE SUBTROPICAL RIDGE.
HOWEVER...ALL OF THE MODELS GENERALLY AGREE THAT THE MID-LEVEL/500
MB CIRCULATION WILL MOVE INTO THE RIDGE AXIS AND STALL IN ABOUT 48
HOURS AS A SHORTWAVE TROUGH MOVES NORTHEAST OF THE DEPRESSION AND
ALLOWS THE RIDGE TO BUILD BACK IN TO THE WEST."
Thank you for that, gkrangers. They have indeed explained the circumstances. I was just wondering about when they throw in with the models, and when they depart, based on experience, personal assessment, and gut feeling. My understanding is that they do not just regurgitate model data. Am I wrong in this thinking?
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748
WTNT61 KNHC 212256
TCUAT1
TROPICAL STORM FRANKLIN TROPICAL CYCLONE UPDATE
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
655 PM EDT THU JUL 21 2005
AT ABOUT 630 PM EDT... 2230Z... DATA FROM THE AIR FORCE
RECONNAISSANCE AIRCRAFT INDICATED THAT MAXIMUM SUSTAINED WINDS IN
TROPICAL DEPRESSION SIX HAD INCREASED TO 40 MPH. THEREFORE THE
SYSTEM IS BEING UPGRADED TO TROPICAL STORM FRANKLIN. DETAILS WILL
FOLLOW IN A SPECIAL ADVISORY TO BE ISSUED BY 8 PM EDT... 0000Z.
FORECASTER KNABB
WTNT61 KNHC 212256
TCUAT1
TROPICAL STORM FRANKLIN TROPICAL CYCLONE UPDATE
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
655 PM EDT THU JUL 21 2005
AT ABOUT 630 PM EDT... 2230Z... DATA FROM THE AIR FORCE
RECONNAISSANCE AIRCRAFT INDICATED THAT MAXIMUM SUSTAINED WINDS IN
TROPICAL DEPRESSION SIX HAD INCREASED TO 40 MPH. THEREFORE THE
SYSTEM IS BEING UPGRADED TO TROPICAL STORM FRANKLIN. DETAILS WILL
FOLLOW IN A SPECIAL ADVISORY TO BE ISSUED BY 8 PM EDT... 0000Z.
FORECASTER KNABB
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- skysummit
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Matt-hurricanewatcher wrote:The ciruation is becoming better defined by the minute. In there is some pop corn convection starting to form over the center. So that is a sign that the system is starting to form its own convection. A line of clouds pushing eastward to the west or west-southwest, has me wondering if that is shear?
http://www.cira.colostate.edu/ramm/rmsd ... PICAL.html
Look at those T-Storms blowing right near the center in that visible.
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