CANBERRA, Aug 5 (Reuters) - U.S. soybean futures edged lower on Thursday, although losses were checked by concerns about global supplies on forecasts for unfavourable weather across a key U.S. producing region.

FUNDAMENTALS

* The most-active soybean futures on the Chicago Board of Trade were down 0.2% to $13.22-1/4 a bushel by 0145 GMT, having firmed 0.5% on Wednesday.

* Corn futures were up 0.1% to $5.47-1/2 a bushel, having closed down 0.9% in the previous session.

* Wheat futures were up 0.1% at $7.17-3/4 a bushel, having closed down 1% on Wednesday.

* The market is eyeing the U.S. Department of Agriculture monthly supply and demand report to be published next week for revisions to U.S. corn and soybean yields and global demand.

* Investors are worried about weather outlook across Midwest, which could threaten corn and soybean crops.

* An estimate by commodity brokerage StoneX released Monday afternoon pegged the U.S. soybean harvest at 4.332 billion bushels with an average yield of 50.0 bushels per acre, slightly below most-recent USDA estimates.

* Russian agriculture consultancy Sovecon said on Monday it had cut its forecast for Russia's 2021 wheat crop by 5.9 million tonnes to 76.4 million tonnes.

MARKET NEWS

* The dollar was poised to push higher as hawkish comments from the U.S. Federal Reserve led markets to bring forward the likely timing of a policy tightening there, while action in Europe and Japan remain distant prospects.

* Oil prices edged higher, supported by tensions in the Middle East, but failed to regain most of the previous day's losses after a surprise build in crude stockpiles in the United States, the world's top oil consumer.

(Reporting by Colin Packham; editing by Uttaresh.V)