ATL: TROPICAL LOW ex-FRED (ex-07L)

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KUEFC
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#861 Postby KUEFC » Tue Sep 15, 2009 2:24 pm

So what is your personal forcast and opinion wxman57? i.e. do you think it will come back?, and possible track and timeframe etc?

and thanks wxman57 i really do appretiate your replys :)
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#862 Postby wxman57 » Tue Sep 15, 2009 2:27 pm

KUEFC wrote:So what is your personal forcast and opinion wxman57? i.e. do you think it will come back?, and possible track and timeframe etc?


Probably continues west as a remnant low to just NE of the Bahamas on Saturday. At that time, a cold front moving off the East U.S. Coast may draw what's left of Fred northward. Development chances as estimated by the NHC look good. Less than 30%. Probably closer to 10-20%.
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#863 Postby KUEFC » Tue Sep 15, 2009 2:33 pm

Thanks wxman57, so all being said and done this should be out of the way around a week from today?
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#864 Postby wxman57 » Tue Sep 15, 2009 2:45 pm

KUEFC wrote:Thanks wxman57, so all being said and done this should be out of the way around a week from today?


I would think so. Where are you, by the way? Can you put your location in your profile?
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#865 Postby Sanibel » Tue Sep 15, 2009 2:53 pm

Looks like shear-induced convection from a dying surface feature.
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#866 Postby ozonepete » Tue Sep 15, 2009 2:57 pm

Sanibel wrote:Looks like shear-induced convection from a dying surface feature.


There's much lower shear there now. Note that the thunderstorm tops are not being blown off - they are staying in place. That indicates no or low shear.
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Re: ATL: TROPICAL DEPRESSION FRED (07L) - Computer Models

#867 Postby wxman57 » Tue Sep 15, 2009 2:58 pm

12Z Euro just loses it after taking it toward the Bahamas/Florida.
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#868 Postby wxman57 » Tue Sep 15, 2009 3:02 pm

jlauderdal wrote:
wxman57 wrote:Shouldn't this discussion be in the Talkin' Tropics area, as Fred is no longer an active storm or an invest?


no because you never posted "Bones"


Soon as I posted that, the NHC started issuing model data again. So never mind.
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#869 Postby HURAKAN » Tue Sep 15, 2009 3:46 pm

Image

Image

Latest
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Derek Ortt

#870 Postby Derek Ortt » Tue Sep 15, 2009 4:01 pm

looks to be directly under the UL now. Trying to get some upper air temp data (and not from models)
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Re: ATL: TROPICAL DEPRESSION FRED (07L) - Computer Models

#871 Postby KUEFC » Tue Sep 15, 2009 4:11 pm

I am actually from Liverpool UK, but tropical cyclones have become an interest over the years.
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#872 Postby cycloneye » Tue Sep 15, 2009 4:22 pm

Increasing convection over circulation.Orange at 8?

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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#873 Postby Blown Away » Tue Sep 15, 2009 4:23 pm

:uarrow: I agree, also look at the loop former Fred is picking up forward speed.
http://www.ssd.noaa.gov/goes/east/tatl/loop-avn.html
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#874 Postby HURAKAN » Tue Sep 15, 2009 4:43 pm

Image

Image

Looking better
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#875 Postby cycloneye » Tue Sep 15, 2009 4:55 pm

Below is the last advisory when NHC pronnounced Fred dissipated by now but mother nature as a mind of its own.

INITIAL 12/2100Z 17.7N 33.7W 30 KT...REMNANT LOW
12HR VT 13/0600Z 18.1N 34.1W 25 KT...REMNANT LOW
24HR VT 13/1800Z 19.0N 35.1W 25 KT...REMNANT LOW
36HR VT 14/0600Z 19.8N 37.0W 25 KT...REMNANT LOW
48HR VT 14/1800Z 21.1N 39.6W 25 KT...REMNANT LOW
72HR VT 15/1800Z...DISSIPATED

http://www.nhc.noaa.gov/archive/2009/al ... .021.shtml?
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#876 Postby ozonepete » Tue Sep 15, 2009 5:11 pm

It's definitely in a low shear environment for now, since it is also under the ULL now, as Derek noted. It of course needs to develop an upper anticyclone over it to become any kind of decent tropical cyclone again. But note the outflow plume developing over the northern half of the cyclone. This is helping to enhance the thunderstorm cluster activity by allowing upper level air to be evacuated to the northeast. If this persists, it's within the realm of possibility that outflow could develop in other quadrants, and then Fred would be back in business. But for how long? There are very complex conditions out ahead of Fred...

Image
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#877 Postby ozonepete » Tue Sep 15, 2009 6:04 pm

Pretty significant convective blow-up. And not only is it getting over the LLC, but the nocturnal convective activity cycle is just starting. Looks like Code Orange at 11PM.

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#878 Postby curtadams » Tue Sep 15, 2009 6:20 pm

Well, it's had several large blow ups get blown off before so probably premature for a Code Orange. NHC always drags its feet on major changes so I'd expect them to wait for at least 24 hours of strong convection before reactivating.

Has seemed worthy of an invest pretty much the whole time, though, with CMC and NOGAPS generally forecasting a continuing storm.
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Re: ATL: TROPICAL DEPRESSION FRED (07L)

#879 Postby jlauderdal » Tue Sep 15, 2009 6:22 pm

ozonepete wrote:Pretty significant convective blow-up. And not only is it getting over the LLC, but the nocturnal convective activity cycle is just starting. Looks like Code Orange at 11PM.

Image


it can have the biggest best blow up in the world but if the nhc doesnt think it has a 30-50% chance of being a tropical cyclone within 48hrs than it wont be code orange, its that simple.
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#880 Postby Shewtinstar » Tue Sep 15, 2009 6:23 pm

Is there any idea of where this will go if it does continue?
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