v. dial. [Imitative.] intr. To sigh, sough. Hence Suther sb.
 
1821.  Clare, Vill. Minstr., II. 105. No noise is heard, save sutherings through the trees, Of brisk wind gushes, or a trembling breeze.
 
1881.  Leicestershire Words, Suther 
 the sighing of the wind.