Omaha, Oct. 26. - The warmest month of October ever experienced by white men in this región is closing in a blizzard. Rain began falling in western Nebraska and South Dakota turning to snow and continuing all night. Dispatches from Valentic are to the effect fhat heavy snow has" fallen there, while in the western end of the state the railways are having trouble in moving trains. Snow has fallen in the Black Hills and in central South Dakota cold rains have put a stop to threshing.