Dr. Jeff Masters' WunderBlog

Tropical Depression Seven forms
Posted by: Dr. Jeff Masters, 14:25 GMT le 14 août 2011 +14
The latest in our unusual number of weak tropical cyclones this season, Tropical Depression Seven, has formed to the southeast of Bermuda. Unless you live in Bermuda, TD 7 is not going to be a concern. Radar out of Bermuda shows an area of rain on the northern side of TD 7 beginning to approach the island, and rain from the storm will likely affect the island tonight and on Monday. TD 7 is not well-organized, and has only limited heavy thunderstorms, as seen on visible satellite images. While wind shear is a low 5 - 10 knots, dry air surrounds TD 7, and is keeping the storm from intensifying. None of the computer models foresee that TD 7 will ever become more than a weak tropical storm.


Figure 1. Morning satellite image of TD 7.

92L
TD 7 isn't the only system Bermuda needs to watch, Invest 92L is a day behind it, and will follow a path very similar to TD 7's. The disturbance will pass close to Bermuda on Tuesday, bringing the island a second round of tropical rains. However, Invest 92L is very disorganized, as seen on recent visible satellite loops. Dry air and close proximity to TD 7 will likely keep 92L from showing significant development over the next two days, with NHC giving the system just a 30% chance of developing into a tropical depression by Tuesday morning.

Elsewhere in the tropics
The disturbance midway between the Lesser Antilles Islands and the coast of Africa we've been tracking over the past few days, Invest 93L, has fallen apart and is no longer a threat to develop. This system will need to be watched once it enters the Caribbean later this week, though. None of the reliable models for predicting tropical cyclone formation predict development of this system or any new disturbances over the coming week.

Jeff Masters
Categories: Hurricane
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652. CitikatzSouthFL 21:10 GMT le 14 août 2011    
Quoting deaddude21:

Meh, that might be what the media will tell you, but in fact you can start putting away your hurricane equipment when September passes and the pattern begins to revert to fast troughs, and store them away for good as soon you start buying candy for trick-or-treaters. It's as close to impossible as it gets to have a US landfalling hurricane in November. There's just too many troughs and too much cold water. I'd like someone to show me an example to prove me wrong but it's just darn near impossible. Even October US hits are unlikely (10+ years apart from each other) and always come from the Caribbean so they're predictable.


Sorry, Dude, after Wilma spanked us, I don't put away hurricane kit until AFTER November 30th.
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653. mcluvincane 21:10 GMT le 14 août 2011    
Quoting TropicalAnalystwx13:


Fine.



LOL.. take that deandude
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654. washingtonian115 21:11 GMT le 14 août 2011    
Thanks fellow bloggers for taking care of Deaddude21 for me.
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655. KoritheMan 21:11 GMT le 14 août 2011    
Quoting deaddude21:

I'd like someone to show me an example to prove me wrong


Okay.

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656. stormwatcherCI 21:11 GMT le 14 août 2011    
Quoting deaddude21:

Meh, that might be what the media will tell you, but in fact you can start putting away your hurricane equipment when September passes and the pattern begins to revert to fast troughs, and store them away for good as soon you start buying candy for trick-or-treaters. It's as close to impossible as it gets to have a US landfalling hurricane in November. There's just too many troughs and too much cold water. I'd like someone to show me an example to prove me wrong but it's just darn near impossible. Even October US hits are unlikely (10+ years apart from each other) and always come from the Caribbean so they're predictable.



Hurricane Kate 1985
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657. wxgeek723 21:12 GMT le 14 août 2011    
Lol I bet when the East Pacific spits out a storm that fails to hit hurricane status, the Atlantic will manage to spin up one that does.
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658. TropicalAnalystwx13 21:12 GMT le 14 août 2011    
Quoting deaddude21:
Tropicalanalyst: But that's what I mean, cold water and shear from troughs is too much to allow anything strong to hit the CONUS in November. Ida was pretty weak to begin with though the most interesting storm of the terribly weak season.

When you think of the November hurricanes in recent history -- Lenny, Paloma, Tomas. What happens in every case? They go ENE out to sea or die before they approach Florida or the Gulf Coast. Ida was the best candidate, just too weak.


My point is that, even though there haven't had many hurricane landfalls on the USA after October, you can't say that you could go ahead and put away all your hurricane preparedness supplies, because anything is possible.
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661. stormwatcherCI 21:14 GMT le 14 août 2011    
Quoting stormwatcherCI:



Hurricane Kate 1985
Winds 120 mph 954 mb
Formed November 15, 1985
Dissipated November 23, 1985
Areas
affected Cuba, Florida, Georgia
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663. tropicfreak 21:14 GMT le 14 août 2011    
Quoting deaddude21:
Wow, the US is likely to be spared landfalls yet another hurricane season. This will make 5 out of 6 years...during an extensively active portion of an already active period...amazing.

And yes, Fabian is the last serious Bermuda hit. People complaining that "it's not a fish storm, it might hit Bermuda" need to get a reality check. A fish/recurving OTS storm has about 1 in 1,000 chance of a serious impact on Bermuda. Fabian is to Bermuda as say, Iniki is to Hawaii, or Hurricane Juan is to Halifax. Those places just don't get seriously hit by formidable hurricanes very often.


That is the dumbest thing I have ever heard. We haven't even peaked and you are already saying that the US will be spared???
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664. washingtonian115 21:15 GMT le 14 août 2011    
Quoting deaddude21:
Tropicalanalyst: But that's what I mean, cold water and shear from troughs is too much to allow anything strong to hit the CONUS in November. Ida was pretty weak to begin with though the most interesting storm of the terribly weak season.

When you think of the November hurricanes in recent history -- Lenny, Paloma, Tomas. What happens in every case? They go ENE out to sea or die before they approach Florida or the Gulf Coast. Ida was the best candidate, just too weak.
Dude!!.Some of the woarst hurricanes to happen in the carribean have happened in October-Novemeber.And you say just becuase no storms that come to the U.S have no chance??.Oh it's not important just becuase it doesn't hit the U.S???.Wilma cuased much damage to Mexico and the U.S!! the U.S.Opal much!!!!??.Don't try to write something off.Where the hell is your facts?.
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665. aislinnpaps 21:15 GMT le 14 août 2011    
Part of learning is to be always open to new ideas, changing opinions and the desire to continue learning.
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666. TropicalAnalystwx13 21:15 GMT le 14 août 2011    
Quoting deaddude21:
All due respect, -AMO periods favor that more

And that's two in 100 years. Both Cat 1's too, imo November shouldn't be considered part of the season


Why? Because we don't have many hurricane landfalls in November?

Tropical Storms can be very bad also, and there have been a lot of them over the past century.
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668. nofailsafe 21:15 GMT le 14 août 2011    
Quoting P451:
Hypothetical: If the season ends up with let's say 20 named storms, would you look back and say "WOW!! what an active season!" or would you look back and say "Yeah, the numbers are there, but 6 of those were tiny weak short lived systems."


Just wondering what is important to folks when judging a season's importance.



It just takes one bad storm for a season to be bad.
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669. SouthDadeFish 21:15 GMT le 14 août 2011    
Michelle in 2001 was a hurricane that came very close to Florida in November. Easily could have been a Florida landfall if the trough came in a little later.

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670. stormwatcherCI 21:15 GMT le 14 août 2011    
Quoting TropicalAnalystwx13:


My point is that, even though there haven't had many hurricane landfalls on the USA after October, you can't say that you could go ahead and put away all your hurricane preparedness supplies, because anything is possible.
Furthermore, there are more people on here than just the ones in the US. Hurricane Paloma 2008 hit the Cayman Islands as a Cat 4 in November.
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671. starbuck02 21:16 GMT le 14 août 2011    
Quoting deaddude21:
All due respect, -AMO periods favor that more

And that's two in 100 years. Both Cat 1's too, imo November shouldn't be considered part of the season


Wasn't Wilma close to November? Maybe my memory isn't that great.
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672. rv1pop 21:16 GMT le 14 août 2011    
Quoting nofailsafe:


I've found that even if the theory should be correct, the execution may take some work. As a synthetic chemist I run into more reactions that don't work the first time you run them than do, even if they're well known or documented procedures. Sometimes it's a bad batch of a reagent, or there's some other environmental factor. Sometimes it's just whether or not you've sacrificed a hamster that day.

Unless of course you're Bengu Sezen, look her up sometime. Now that's a bedtime story for the ages.

*Oh, and I'm not disagreeing with you, I just thought I'd throw in my two cents.
And I agree completely ... kinda ... were you talking about science, religion or both? If both, we have agreement. Some variables are either unknown or hidden in both! (in "religion" they call it faith.)
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673. nrtiwlnvragn 21:16 GMT le 14 août 2011    
Quoting deaddude21:

Meh, that might be what the media will tell you, but in fact you can start putting away your hurricane equipment when September passes and the pattern begins to revert to fast troughs, and store them away for good as soon you start buying candy for trick-or-treaters. It's as close to impossible as it gets to have a US landfalling hurricane in November. There's just too many troughs and too much cold water. I'd like someone to show me an example to prove me wrong but it's just darn near impossible. Even October US hits are unlikely (10+ years apart from each other) and always come from the Caribbean so they're predictable.


Maybe where you live, but in South Florida October is a busy month.

Excerpt:

Although overall tropical activity typically begins to quiet down in the Atlantic Basin during the month of October, south Florida is still prone to a tropical cyclone strike. In fact, since 1851 more hurricanes have struck the south Florida mainland in October than in any other month of the season. A total of 19 hurricanes have impacted the south Florida mainland in October, compared to 15 in September. A total of 30 tropical cyclones (tropical storms and hurricanes) have affected mainland south Florida, also the most of any month. Although the number of hurricanes peak in October, the number of major hurricanes (Category 3 or greater) which have impacted the area is less than in September. Since 1851, a total of 7 major hurricanes have affected the area, ranking behind September which has had 11 major hurricanes.
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675. aquak9 21:17 GMT le 14 août 2011    
Quoting P451:
Hypothetical: If the season ends up with let's say 20 named storms, would you look back and say "WOW!! what an active season!" or would you look back and say "Yeah, the numbers are there, but 6 of those were tiny weak short lived systems."


Just wondering what is important to folks when judging a season's importance.



That's a real good question. ACE? Number of named storms? Human impact? Each category is valid.
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676. TropicalAnalystwx13 21:17 GMT le 14 août 2011    
Anyways...Don't give up hope for 96L just yet. You know the storms in past seasons such as Grace in 2009 couldn't have had favorable environmental conditions that far north, could it have?

But yet, it formed.
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677. tropicfreak 21:17 GMT le 14 août 2011    
Quoting deaddude21:

October 24th. Did you really believe Gamma was going to intensify to a major and hit you?


Last I checked hurricane season ends November 30th, so you can never let your guard down.
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678. aislinnpaps 21:17 GMT le 14 août 2011    
You know my favorite bumper sticker? 'Hire a teenager while they still know it all'. I still have two teens at home and two that are now in their twenties. I keep waiting for one of them to get me that bumper sticker. The older two now quote it.
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679. stormwatcherCI 21:18 GMT le 14 août 2011    
Quoting starbuck02:


Wasn't Wilma close to November? Maybe my memory isn't that great.
Oct 15-26.
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680. Tazmanian 21:18 GMT le 14 août 2011    
Quoting TropicalAnalystwx13:
Anyways...Don't give up hope for 96L just yet. You know the storms in past seasons such as Grace in 2009 couldn't have had favorable environmental conditions that far north, could it have?

But yet, it formed.



vary ture
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681. tropicfreak 21:18 GMT le 14 août 2011    
Quoting TropicalAnalystwx13:
Anyways...Don't give up hope for 96L just yet. You know the storms in past seasons such as Grace in 2009 couldn't have had favorable environmental conditions that far north, could it have?


Vince is another great example.
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683. Tazmanian 21:19 GMT le 14 août 2011    
TropicalAnalystwx13: what do you think about ex 93L it sure has made a good come back today


all so what you think of 92L i think 92L will have a btter ch once gret moves a way some
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684. mcluvincane 21:19 GMT le 14 août 2011    
Quoting washingtonian115:
Dude!!.Some of the woarst hurricanes to happen in the carribean have happened in October-Novemeber.And you say just becuase no storms that come to the U.S have no chance??.Oh it's not important just becuase it doesn't hit the U.S???.Wilma cuased much damage to Mexico and the U.S!! the U.S.Opal much!!!!??.Don't try to write something off.Where the hell is your facts?.


That's when he lost all credability. Almost trollish words he speaks
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686. TropicalAnalystwx13 21:21 GMT le 14 août 2011    
If I know one thing about 96L for sure, its that it has a well-defined circulation and it is closed. The only thing it lacks to become a tropical system is organized convection, and the center is going through times when it can be seen, and when it is obscured by strong thunderstorm activity. If shear were to lower for a just a little while, and even if it doesn't, there is still a good chance of this becoming a tropical depression or storm.

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687. all4hurricanes 21:21 GMT le 14 août 2011    
Quoting TropicalAnalystwx13:


Gladly.



Hurricane Ida (2009). May not have been a hurricane at landfall, but it had been a hurricane within the past 48 hours prior to landfall.

Good afternoon all.

I hurricane in 1925 made landfall in the US in December
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688. nrtiwlnvragn 21:22 GMT le 14 août 2011    
Quoting deaddude21:

Note the major hurricane difference. Sure every 8 years or so you'll get a weakling that manages to travel through the Caribbean Hebert Box and hit Florida but I dare you to find me another Wilma.


Hurricane King developed over the western Caribbean Sea, tracked northeast across central Cuba, then turned north-northwest, making landfall at Miami just before midnight on October 17, 1950 as a major Category 3 hurricane.
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690. Tazmanian 21:22 GMT le 14 août 2011    
Quoting TropicalAnalystwx13:
If I know one thing about 96L for sure, its that it has a well-defined circulation and it is closed. The only thing it lacks to become a tropical system is organized convection, and the center is going through times when it can be seen, and when it is obscured by strong thunderstorm activity. If shear were to lower for a just a little while, and even if it doesn't, there is still a good chance of this becoming a tropical depression or storm.





can have a link of where you got that photo from thanks all so plzs look at post 683
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693. TropicalAnalystwx13 21:24 GMT le 14 août 2011    
Quoting Tazmanian:
TropicalAnalystwx13: what do you think about ex 93L it sure has made a good come back today


all so what you think of 92L i think 92L will have a btter ch once gret moves a way some


92L is being absorbed into Tropical Storm Gert IMO, it may be part of the tropical system soon. As for 93L, the chances for development prior to the Caribbean are Near 0%, but it will need to be watched in the Central/Western Caribbean for development.
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695. TropicalAnalystwx13 21:25 GMT le 14 août 2011    
Quoting Tazmanian:




can have a link of where you got that photo from thanks all so plzs look at post 683


Link
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696. CitikatzSouthFL 21:26 GMT le 14 août 2011    
Quoting nrtiwlnvragn:


Maybe where you live, but in South Florida October is a busy month.

Excerpt:

Although overall tropical activity typically begins to quiet down in the Atlantic Basin during the month of October, south Florida is still prone to a tropical cyclone strike. In fact, since 1851 more hurricanes have struck the south Florida mainland in October than in any other month of the season. A total of 19 hurricanes have impacted the south Florida mainland in October, compared to 15 in September. A total of 30 tropical cyclones (tropical storms and hurricanes) have affected mainland south Florida, also the most of any month. Although the number of hurricanes peak in October, the number of major hurricanes (Category 3 or greater) which have impacted the area is less than in September. Since 1851, a total of 7 major hurricanes have affected the area, ranking behind September which has had 11 major hurricanes.

+1,000
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697. Neapolitan 21:26 GMT le 14 août 2011    
When oh when will otherwise good members here learn to sniff out trolls and simply ignore them? (HINT: s/he's not here to expand upon his or her knowledge of tropical weather.)
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698. AllStar17 21:26 GMT le 14 août 2011    
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699. MississippiWx 21:26 GMT le 14 août 2011    
96L should have been declared an invest 24 hours ago. I pointed it out yesterday when it was NW of Bermuda and it had a decent low level circulation at that time. Seems like the NHC was too busy to declare another one. If you're going to declare one, you have to be consistent and declare all of these little areas.
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700. Tazmanian 21:26 GMT le 14 août 2011    
Quoting TropicalAnalystwx13:


92L is being absorbed into Tropical Storm Gert IMO, it may be part of the tropical system soon. As for 93L, the chances for development prior to the Caribbean are Near 0%, but it will need to be watched in the Central/Western Caribbean for development.



ok thanks
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701. islander101010 21:27 GMT le 14 août 2011    
s fl. was lucky with wilma what if she turned into a cat 5 then turned ne instead of crashing into the yucatan? could of had a cat 4 at leastin s fl.
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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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