* CBOT wheat prices found strength after falling to the 50-day moving average early in the session and accelerated as prices rallied past key resistance points at the 30-day and 100-day moving averages. * The strength in the benchmark CBOT market spilled over to MGEX spring wheat, which eked out a small gain despite forecasts for improved crop weather in key growing areas of the United States. * Significant snowfall is expected by the weekend in the dry areas of the US spring wheat belt, which will provide a much-needed boost to soil moisture levels ahead of spring planting, said Don Keeney, meteorologist for MDA EarthSat Weather. * Russia will maintain wheat export volumes of around 22 million tonnes in 2012/13, Russian industry and government officials said. * Ukraine's government said it had not urged grain traders to limit wheat exports and forecast that there would be no shortages of grain on the domestic market. * Tunisia's state grains agency issued an international tender to buy 50,000 tonnes of optional-origin soft wheat for shipment in April, European traders said. * Bangladesh tendered to import 50,000 tonnes of wheat to boost reserves, a procurement official said.