DeMundo 142:10 :ܡܐ ܕܝܢ ܕܡܢ ܫܠܝ ܘܬܟܝܒܐܝܬ ܢܚ݁ܬ ܗ݀ܘ ܬܠܓܐ݂ ܟܘܟܝܬܐ ܡܫܬܡܗ‏ : when, then, the snow falls suddenly and strongly, it is termed a snowstorm
See the entire entry for kōḵī, kōḵīṯā n.f. storm, whirlwind