* Oil rises for 2nd day on storm worry in the Caribbean
* Investors eye tension between West and Russia
* Key events ahead include U.S. oil data
TOKYO, Aug 26 (Reuters) - Oil extended gains to stay above $115 a barrel on Tuesday, supported by worries that tropical storm Gustav in the Caribbean would turn into a hurricane and disrupt oil output in the Gulf of Mexico.
Crude for October delivery <CLc1> rose 37 cents to $115.48 a barrel by 0225 GMT, while London Brent crude <LCOc1> gained 42 cents to $114.45 a barrel.
Tropical Storm Gustav, the seventh tropical storm formed in the central Caribbean, could strengthen into a hurricane before striking vulnerable Haiti, the U.S. National Hurricane Center said. [
]It was expected to hit Hispaniola, the island shared by Haiti and the Dominican Republic, on Tuesday. At least one computer forecasting model showed the storm could enter the Gulf.
A drop in the dollar against the yen, pressured by sharp losses in the U.S. equities market, also helped buoy oil prices. [
]Jonathan Kornafel, Asia director at U.S.-based options trader Hudson Capital Energy, based in Singapore, said concerns about a possible hurricane had "a lot to do" with the gains in the past two days.
Support also came from ongoing tension between the West and Russia over Georgia and expectations that oil exporter group OPEC, which meets on Sept. 9, could trim production should prices fall further.
"I think overall the trend of the market is bearish right now, but the hurricane premium as well as the Russia-NATO premium is what's keeping the market from dropping further," Kornafel said.
Russia's parliament urged the Kremlin on Monday to recognise two rebel regions of Georgia as independent states, raising alarm in the West. [
]Britain said on Monday it believed it would be wrong for all NATO-Russia contacts to be suspended despite widespread concern in the alliance about Russian military action in Georgia.
OPEC OUTPUT
Iran's oil minister said on Monday he expected OPEC to work on preventing the falling trend in crude prices and also to study oversupply in the market when it meets on Sept. 9 in Vienna. [
]An OPEC source, however, said, the cartel is likely to keep oil output policy unchanged. [
]Another key piece of data on Wednesday will be U.S. crude oil inventories, which are likely to have risen 1.4 million barrels last week, a Reuters preliminary poll showed. [
]In the previous week, crude stocks shot up by 9.4 million barrels as crude imports rose after delivery delays caused by Tropical Storm Edouard.
The poll of eight analysts showed an average forecast for a 400,000-barrel gain in distillates.
Analysts expect U.S. gasoline stocks to show a drop of 2.8 million barrels, a fifth straight weekly decline, as refiners drained storage of summer-grade supply ahead of the Labor Day holiday weekend, which marks the end of the summer driving season. (Reporting by Osamu Tsukimori: Editing by Nick Trevethan)