Dr. Jeff Masters' WunderBlog

Western Caribbean disturbance unlikely to develop this week
Posted by: Dr. Jeff Masters, 4:57 PM GMT on June 07, 2009 +2
An area of disturbed weather is bringing some heavy rains to Nicaragua and Honduras and the adjacent waters of the Western Caribbean. This disturbance has generated 2 - 3 inches of rain over these countries over the past two days, and is likely to bring an additional 2 - 3 inches of rain to northeastern Honduras and Nicaragua over the next two days. The disturbance is expected to gradually drift northwards, bringing heavy rain to the Cayman Islands, Jamaica, and Cuba by Monday or Tuesday. The disturbance is under prohibitively high wind shear of 30 - 40 knots, and is not a threat to develop today or Monday. Some of the computer models are predicting wind shear may fall low enough to allow development of this system 4 - 7 days from now, but the models have been rather inconsistent in the location and timing of any such development. For now, the chances of a tropical depression forming from this disturbance within the next week appear low, less than 30%.


Figure 1. Visible satellite image of the Western Caribbean disturbance.

I'll have an update Monday.

Jeff Masters
Categories: Hurricane
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801. SavannahStorm 3:47 AM GMT on June 08, 2009    
00Z GFS is running, up to 84hrs now. Showing a lot of precip at the edge of the image.

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805. scottsvb 3:49 AM GMT on June 08, 2009    
alot of hypecasting going on in here...but this site usually brings it! LOL
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806. SavannahStorm 3:49 AM GMT on June 08, 2009    


The Great POOF of 09' continues.
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807. GeoffreyWPB 3:50 AM GMT on June 08, 2009    
Let's see what the poof looks like 12 hours from now!
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809. scottsvb 3:51 AM GMT on June 08, 2009    
This setup folks is NO DIFFERENT than the blow-up of storms a couple weeks ago south of Hispaniola in the Carribean...
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810. Tazmanian 3:51 AM GMT on June 08, 2009    
91E looks good





and did i say bust too 91E??? ooops
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811. HURRICANECAT5 3:51 AM GMT on June 08, 2009    
I think things are beginning to come together. This may be an interesting week. this blob is looking pretty healthy and it is right in the area where the gfs was forecasting development. Time will tell....
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812. KEEPEROFTHEGATE (Mod) 3:52 AM GMT on June 08, 2009    


shortwave sat image
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813. ackee 3:52 AM GMT on June 08, 2009    
the blob took me by surprise things that do devlop in the SW carrb are like that
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814. cchsweatherman 3:53 AM GMT on June 08, 2009    
Quoting scottsvb:
There is no surface reflection @ the surface being reported by ship,bouy or latest satelite pass...there is a weak low over Central Nicaragua @ this time along with the BASE of the upper trough that streches NE into the bahamas. This weak low will migrate over the next few days NE and be south of Jamaica later Thurs into Friday. We may in a few days have something..but in the next 36-60hrs..nothing more than the upper trough causing large areas of Thunderstorms moving in the mid-levels.


When I look at surface observations, I use the NowCOAST Web-Mapping and Satellite Server since they have accurate and constantly updated data and imagery. Thats where I got the observations that indicated an east wind on the north and a west wind on the south which would be indicative of some surface reflection occuring. Not only that, but when you look very closely at daytime visible/nighttime IR satellite loops (I use Tropical RAMSDIS for this), you can see the low-level clouds starting to get drawn northward into the disturbance. All this indicates to me at least that we're starting to see something happening at the surface.

Now, even with this happening, I do agree that it will still take sometime before we get anything substantial, but this all does indicate that this disturbance may be trying to get organized.
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816. Orcasystems 3:52 AM GMT on June 08, 2009    
Blog Update
Reflector site for those at work, which now also includes Weather456, daily updates


AOI #1

AOI #2
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817. G35Wayne 3:52 AM GMT on June 08, 2009    
Looks like a tumur
818. heliluv2trac 3:52 AM GMT on June 08, 2009    
how is it going to hit florida going nnw
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819. scottsvb 3:54 AM GMT on June 08, 2009    
Everything you see is being enhanced by the trough....only a weak circulation exists and its over Nicaragua and not over the T-Storm mass!
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823. Stormchaser2007 3:56 AM GMT on June 08, 2009    
If it looks this way at 8am tomorrow ill be impressed and reconsider its development. You cant have -80C tops over an area for so long without having some kind of surface reflection develop under it. We'll see what it does tonight. Its very odd how it developed convection at the near peak of the diurnal minimum....

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824. SavannahStorm 3:57 AM GMT on June 08, 2009    
Quoting scottsvb:
Everything you see is being enhanced by the trough....only a weak circulation exists and its over Nicaragua and not over the T-Storm mass!




Nothing to see here. There is no truth to the wishcasting propaganda that the BLOB has been upgraded to POOF status.
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825. scottsvb 3:57 AM GMT on June 08, 2009    
Im glad they banned ya weatherstudent over there.. they dont take noobs! HA!
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827. 7544 3:58 AM GMT on June 08, 2009    
the new gfs is strting now we might see a much diffent run then the last one stay tuned
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828. GeoffreyWPB 3:59 AM GMT on June 08, 2009    
Fay..

Photobucket



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831. SavannahStorm 3:59 AM GMT on June 08, 2009    
Quoting 7544:
the new gfs is strting now we might see a much diffent run then the last one stay tuned


lol, so far the 00Z GFS shows the system just sitting in place for 4 days.
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832. KEEPEROFTHEGATE (Mod) 4:01 AM GMT on June 08, 2009    

scott
tropical developement is a science that warrants further and ongoing observation as it is not an exact science and requirers further study to predict accurate developement of these systems

so you know not all not even the experts
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834. ackee 4:02 AM GMT on June 08, 2009    
looking closeing on the blog we might be in for a lots of rain here in jamaica next couple of days
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835. cchsweatherman 4:02 AM GMT on June 08, 2009    
Quoting WeatherStudent:


Ha, well stated, WeatherMan. Now, try to grammatically rebutal that, FLHurricane.com dude?


Don't want to get into any confrontation or standing people up here. Just pointing out my observations and the evidence I used to make them. We're all here to give our opinions and to learn from each other. So please don't try and use my opinion to incite a possible confrontation since, as you probably know well from experience, it doesn't lead to good things here and can be more detrimental than beneficial.
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836. scottsvb 4:03 AM GMT on June 08, 2009    
Quoting KEEPEROFTHEGATE:

scott
tropical developement is a science that warrants further and ongoing observation as it is not an exact science and requirers further study to predict accurate developement of these systems

so you know not all not even the experts


Who said I know all? I didnt.
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838. KEEPEROFTHEGATE (Mod) 4:10 AM GMT on June 08, 2009    
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839. SavannahStorm 4:13 AM GMT on June 08, 2009    


00Z GFS @ 102 hrs. System is just parked in the Carribean.
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840. GeoffreyWPB 4:13 AM GMT on June 08, 2009    
It does look impressive...but look at all that dry air north of it.
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841. heliluv2trac 4:19 AM GMT on June 08, 2009    
how is it going to hit fla going nnw
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842. ackee 4:19 AM GMT on June 08, 2009    
seem like the blob has some sort of spin to me we see what will happen later good night
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843. KEEPEROFTHEGATE (Mod) 4:20 AM GMT on June 08, 2009    
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845. Tazmanian 4:25 AM GMT on June 08, 2009    
Quoting WeatherStudent:


I'm not banned from there, I've got an account, inactive however, but it's there. :)
Quoting WeatherStudent:


I'm not banned from there, I've got an account, inactive however, but it's there. :)



and what site would that be???
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848. scottsvb 4:29 AM GMT on June 08, 2009    
Blog killed the hypecasters!..Where are the smarter posters like Levi,hurricane23,TampaSpin and a few others..lol
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849. TampaFLUSA 4:29 AM GMT on June 08, 2009    
The blog won't freeze as much if you make your images smaller imo...
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850. Tazmanian 4:30 AM GMT on June 08, 2009    
Quoting WeatherStudent:



link????????
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851. KEEPEROFTHEGATE (Mod) 4:32 AM GMT on June 08, 2009    
i don't hype cast pal been around along time my first was david in 79
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About JeffMasters
Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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