Regional News  Black Sea weather patterns are trending cold and dry. Temperatures are too cold for crop growth and a large portion of the central wheat-growing region will need to be replanted. Conditions remain favorable in southern Russia, however. Overall, threats to the Russian crop are outweighing favorable conditions in the south, causing FOB prices to rise. Europe is facing a similar weather trend with below-normal temperatures forecast for this week and most of the following week. Southern Europe will remain dry this week before rains return next week, though the forecast mid-April rains will miss the UK.  German winter crops were not as affected by recent cold weather as crops in other EU countries. Traders note German...