CHICAGO, July 6 (Reuters) - The following are U.S. expectations for the resumption of grain and soy complex trading at the Chicago Board of Trade at 8:30 a.m. CDT (1330 GMT) on Friday.

WHEAT - Up 2 to 11 cents per bushel

• Wheat futures rose on continued support from a surprise cut by the U.S. Department of Agriculture in its acreage estimate last week, though large harvests forecast in the Black Sea export region have tempered concerns about a small U.S. crop. GRA/

• Saudi Arabia purchased 661,000 metric tons of wheat in its fourth tender this year, the General Food Security Authority said on Monday.

• CBOT September soft red winter wheat WU26 was last up 10-1/2 cents to $6.10-1/4 per bushel. K.C. September hard red winter wheat KWU26 was last 8-1/4 cents higher to $6.46-3/4 per bushel, while Minneapolis September spring wheat MWEU26 was last up 6-1/4 cents to $6.25 per bushel.

CORN - Up 12 to 14 cents per bushel

• Corn jumped as a heatwave in the central and eastern U.S. last week stirred weather worries in the run-up to crucial summer growth periods for crops GRA/.

• Corn continued to see some support from Tuesday's USDA acreage and stocks estimates. The USDA estimated the July 1 quarterly corn stocks lower than analysts' views.

• CBOT December corn CZ26 was last up 13-1/2 cents at $4.55 per bushel.

SOYBEANS - Up 24 to 35 cents per bushel

• Soybeans shot up on speculation about Chinese interest in U.S. crops despite a lack of indications of deals, traders said. GRA/

• A heatwave in the central and eastern U.S. last week added support as crops approached a critical development period.

• CBOT November soybeans SX26 were last 34-1/2 cents higher to $11.82-1/4 per bushel.