Tropical Depression Seven forms
Tropical Depression Seven is here. Looking remarkably like the tropical depression that became Tropical Storm Ernesto on August 1, TD 7 has a limited region of heavy thunderstorms, as seen on satellite loops. A large amount of dry air to the west and north is visible on water vapor satellite loops, and this dry air is interfering with TD 7's heavy thunderstorms. Wind shear is a light 5 - 10 knots, which is quite favorable for intensification. Ocean temperatures are 26°C, which is a bit on the cool side, though. Winds at the Middle Atlantic buoy 41041 were 20 mph at 5 pm EDT, and should rise this evening, as the center of TD 7 passes about 50 miles to the south near midnight. The first hurricane hunter mission into TD 7 is scheduled for Saturday morning.

Figure 1. Satellite image of TD 7 as it was forming at 3:17 pm EDT August 9, 2012.
Forecast for TD 7
TD 7 formed about 400 miles east-northeast of where Ernesto became a tropical depression, as seen on our wundermap. Atmospheric and oceanic conditions are currently quite similar to what Ernesto experienced, and I expect TD 7 will struggle with dry air like Ernesto did. The SHIPS model predicts that shear will remain light through Friday then rise to the moderate range on Saturday, when the storm will encounter moderate shear from upper-level westerly winds associated with a trough of low pressure. Since conditions are so similar to what Ernesto experienced, the official NHC forecast of a 45 - 50 mph tropical storm moving through the Lesser Antilles Islands Saturday and Sunday is a reasonable one.
Jeff Masters
Reader Comments
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Don't look that way... yet!
WOW!!!! That not good
If you think that post is from a troll, why do you fall for the tactic and respond to it?
What part of "IGNORE" don't you understand.
It becomes very very boring.
407 mitthbevnuruodo: TBH I have no idea where it was derived from...and I doubt anyone who uses it would actually know either. But, it could just be revolutionary. After all, at the base, in their eyes we were just upstarts trying to break away from the crown! So I reckon, it could have come down from independance itself...the dodgy Yanks breaking away from British rule!
The other meaning of 'Yank' to British men is comparable to the other meaning of 'Jill' to American women.
jason is back really under what name I don't even think its two days yet since he got ban again
but I think TD7 will gain convection by morning and become TS Gordon at 8am with TS watches for the windwards and 93L will become TD 8 either at 11pm 2am or 5am either way I do think 93L will be named at 8am or 11am tomorrow with TS watches for the CV Islands
Poor Flo she didnt make it.
Anything that exits Africa above 15N has a very hard time getting all way to the Islands!
http://www.reuters.com/article/2012/08/10/us-stor m-ernesto-idUSBRE8730B820120810
LOL!!! XD
As expected according to the 00Z steering
Think he may be undergoing Fujiwhara
lol thats what came up on google well hes proably happy now to know hes on google
seems so and if that is more models will go Caribbean
If it develops in to a hurricane before 45W then say bye-bye - FISH!
Yeah, I saw that.
I don't like it much....
Sorry :-)
Not very pretty, is it?
The dry air north and N/W is taking it's toll.
More moisture to the S/W if it can make it.
Fujuwharic motion is not a taboo. It happens. Rarely, but interesting when it does. If you see an instance of Fuju, post it, otherwise no big deal, especially in this year of dueling centers.
First time I've looked at the map. :p
MinimumPressure decreased from 1010millibars to 1009millibars
MaxSusWinds held at 30knots(35mph)56km/h
Vector changed from 270.1*West@13.4mph(21.6km/h) to 270.2*West@19mph(30.6km/h)
POS-Trinidad :: BGI-Barbados
The easternmost dot on the kinked line is where 92L became a LOw again
The westernmost dot on the kinked line is where 92L became AL07
The easternmost dot on the longest line is TD.7's most recent position
The longest line is a straightline projection through TD.7's 2 most recent positions to its closest approach (within 18miles or 29 kilometres) to a coastline
9August12pmGMT: AL07 had been headed for passage over SangreGrande (rightPOSdumbbell)
9August6pmGMT: TD.7 had been headed for passage over GrantleyAdamsInternationalAirport,Barbados
10August12amGMT: TD.7 was heading for passage over Bathsheba in ~2days3hours from now (when this comment was posted)
Copy&paste pos-10.595n61.023w, bgi-13.09n59.457w, 12.1n31.2w-12.7n32.5w- 13.3n33.9w- 13.9n35.4w- 14.1n37.0w- 14.1n38.5w- 13.9n40.0w- 13.7n41.7w, 13.7n41.7w-13.7n42.9w, 13.7n42.9w-13.7n44.6w, 13.7n42.9w-13.198n59.488w into the GreatCircleMapper for a larger-scale map and other information
The previous mapping for comparison
D-min with a newly developed system that was already struggling with dry air over 26C SST. Could have seen that one coming from across the globe. ;-)
07L/TD/XX/CX
MARK
13.28N/44.44W
I saw the same thing looking at 200 and 500mb for
same time 7 gets into C. Carib... I think blog will implode if we get Ernie Redoux..lol
Shhh. It's not that easy for some people. ;)
NO WAY!!!
I wonder what % we will have at 2am...
20000000%
Did not realize 93L had a twin. What a strange year.
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