by H. Branch, O. Ryan, and E. Warner for the Civil Aeronautics Board

“ The main frontal system between the polar and tropical air was centered in a low pressure system in southeastern Wyoming with a warm front extending eastward through southern Nebraska and a cold front extending from the center through Western Colorado. ”

“ EWT the pressure trough associated with the upper cold front had moved into extreme eastern Montana with precipitation continuing to the west of the trough and for about one hundred miles in advance of the upper front.
Ceilings were lowering to six to nine hundred feet between Dickinson, N. D. and Custer, Mont. with light rain and light fog reducing the visibility to three to four miles. The pressure center moved eastward and at 8:30 a.m. was located on the Wyoming–Nebraska border. The warm front of the system moved northward into southern Nebraska. ”