First impression is that it looks good. Everything seems to be referenced and the article is stable, neutral and covers all major points. The two images look fine (PD and own work). I'll jot down some notes that should be easy to resolve and I'll pass it once they have been.
"As it continued westward, it absorbed dry air from northern South America, and Danielle dissipated on September 10." – Danielle is redundant, I'd suggest removing "Danielle" and replacing either the two "it"s in that sentence with "Danielle".
"The threat of Danielle prompted gale warnings in Barbados and Saint Vincent and the Grenadines." – suggest a comma between "Barbados" and "and" to clarify that "Saint Vincent and the Grenadines" is one entity.
Yea. I had to think about that one :P --♫ Hurricanehink (talk) 03:44, 5 August 2011 (UTC)
"Another rain system affected the country a few weeks later, and the combined impact totaled $9.2 million (1986 USD, $18 million 2010 USD)" – possibly need to add "in damage", otherwise it's a bit unclear.
I changed to "combined monetary damage". --♫ Hurricanehink (talk) 03:44, 5 August 2011 (UTC)
"In Trinidad and Tobago, the outer rainbands produced flooding and mudslides." – don't think the comma is necessary.
I think it is helpful here since it is referring to the country, not two separate islands. --♫ Hurricanehink (talk) 03:44, 5 August 2011 (UTC)
"It progressed westward through the tropical Atlantic Ocean, at first at a moderate speed before accelerating to 23 mph (37 km/h) on September 6." – I think the first "at" is unnecessary.
Nice call. I went one step further and did ", initially at..." --♫ Hurricanehink (talk) 03:44, 5 August 2011 (UTC)
"and based on satellite imagery" – replace "based on" with "according to"?
Yep, you did. Thought about failing the GAN because you refused to remove that comma, but I guess I'll let it slide (actually, I see your point and it does make sense to have a comma there). The conversion for mbar was an honest question rather than a suggestion and you can remove the conversion if you want (I honestly don't know if it adds anything to the article or not – it's your call). I just made one small edit changing the total damages to $10.5 million and removing "(PDF)" from ref 10. Had another look over the article and couldn't spot anything so I'm passing this GAN. Congrats and thanks for your quick responses to my review. Cheers, Jenks24 (talk) 13:31, 5 August 2011 (UTC)