* Demand outlook uncertain as other vegetable oils trade lower

* Prices touch 2,049 ringgit, lowest since September 11  (Updates closing prices)

JAKARTA, Aug 3 (Reuters) - Malaysian palm oil futures hit an eleven-month

low on Monday, as other vegetable oils traded lower and expectations of weak

demand and higher output in the coming weeks weighed on prices.

By the close, benchmark palm oil for October on the Bursa Malaysia

Derivatives Exchange ended 3.1 percent lower at 2,055 ringgit ($534) a tonne.

Prices earlier fell to 2,049 ringgit, their lowest since Sept. 11.

Traded volume stood at 39,909 lots of 25 tonnes each, above the roughly

35,000 lots usually traded by the close.

"Dalian is down," said a trader with a foreign commodities brokerage in

Kuala Lumpur. "U.S. soybean oil on Friday night was also down. These are the

main factors in the market. External markets are weak."

The uncertain demand outlook, exacerbated by concerns about top buyer China,

was overshadowing any upside from the impact of dry weather from the El Nino

weather pattern, the trader added.

In other vegetable oils, the U.S. August soyoil contract eased 1.6

percent during late Asian trade, while the most active soybean oil contract

on the Dalian Commodity Exchange slipped 1.9 percent.

U.S. soybeans and corn futures slid for a second session on Monday due to

forecasts of near-perfect weather across the U.S. Midwest, which promises bumper

supplies.

Cargo surveyors' data on Friday for exports of Malaysian palm oil products

in July came in lower than expected.

"Exports in August don't look so good (and) production will rise in August,"

said a second palm trader on the supply outlook.

Highlighting the trend of lower prices for the tropical oil, Indonesia's

export tax for crude palm oil in August will be zero percent, unchanged from

July, a trade ministry official said late on Friday.

Also on the downside, crude oil fell to its lowest in six months, knocked by

fresh evidence of growing oversupply and data highlighting slowing demand in

China, leaving crude prices set for their weakest third-quarter performance

since 2008.

Palm, soy and crude oil prices at 1016 GMT

Contract Month Last Change Low High Volume

MY PALM OIL AUG5 2056 -64.00 2056 2095 398

MY PALM OIL SEP5 2055 -63.00 2052 2106 3110

MY PALM OIL OCT5 2055 -65.00 2049 2112 19269

CHINA PALM OLEIN JAN6 4644 -126.00 4632 4762 672702

CHINA SOYOIL JAN6 5402 -106.00 5382 5500 497370

CBOT SOY OIL DEC5 29.94 -9.00 29.88 30.46 8128

INDIA PALM OIL AUG5 407.50 -9.00 407.10 415.20 1395

INDIA SOYOIL AUG5 566.40 -8.30 566.40 572.50 37200

NYMEX CRUDE SEP5 46.37 -0.75 46.26 46.94 35507

Palm oil prices in Malaysian ringgit per tonne

CBOT soy oil in U.S. cents per pound

Dalian soy oil and RBD palm olein in Chinese yuan per tonne

India soy oil in Indian rupee per 10 kg

Crude in U.S. dollars per barrel

($1 = 3.8510 ringgit)

($1 = 64.0100 Indian rupees)

($1 = 6.2087 Chinese yuan)