(Recasts, updates with U.S. trading, adds new analyst quote, changes byline, dateline; previous PARIS/SYDNEY)
CHICAGO, July 28 (Reuters) - U.S. wheat futures rose on Friday, buoyed by signs of poor yields in drought-hit U.S. spring wheat belts, but the benchmark Chicago Board of Trade soft red winter wheat contract was still headed for a third straight weekly loss as U.S. crop troubles were set against ample global supplies.
Corn and soybeans firmed on concerns about a dry weather forecast in key growing areas of the U.S. Midwest.
"The six to 10-day weather forecast shows average temperatures across the Corn Belt and above-average temperatures in the northern Plains," Derek Hullett at CHS Hedging said in a research note. "Precipitation is unlikely as we head into the month of August."
At 11:20 a.m. CDT (1620 GMT), CBOT September soft red winter wheat futures were up 7 cents at $4.86-3/4 a bushel. MGEX spring wheat was 8-1/4 cents higher at $7.44-3/4 a bushel.
Hot and dry weather during the growing season slashed yield prospects for U.S. hard red spring wheat to the lowest in nearly a decade, according to results from the Wheat Quality Councils' annual tour of North Dakota, the top production state for the crop.
The findings of the tour have helped wheat prices find a footing after falling this week to their lowest since late June. But signs of large harvests in other major exporters like Russia have served as a reminder of ample global supplies.
"Dry conditions in spring wheat areas will provoke a significant drop in harvest potential in the U.S.," consultancy Agritel said, adding, however: "The competition between all players of the Black Sea (region) should be fierce ... considering the size of the volumes collected."
CBOT November soybean futures were up 9-3/4 cents at $10.17-3/4 a bushel and CBOT December corn was 2-1/4 cents higher at $3.90 a bushel.
For the week, corn futures have fallen 0.9 percent and soybean futures have fallen 0.5 percent. CBOT soft red winter wheat was down 2.5 percent this week while MGEX spring wheat was down 2.7 percent. (Additional reporting by Colin Packham in Sydney and Gus Trompiz in Paris; Editing by Mark Heinrich and Dan Grebler)