Nevada Test Organization
Office of Test Information

The doughnut shaped cloud resulting from this morning's high air burst rose far above the detonation point, with its peak above 40,000 feet, and its main mass well above 20,000 feet.

It was being blown north-northeast at about 30 knots as it moved away from the Test Site.

While offsite monitors were being deployed as usual along the downwind path, no fallout other than possibly traces was anticipated.

The airmass from less than 30,000 feet to above 40,000 feet is expected to follow a trajectory somewhat to the west of Salt Lake City and generally northeastward across Montana. By 1 p.m. PDT today the leading edge of the air mass should be approaching the area of Malad City in southeastern Idaho, with the lower portions of the air mass approaching a point some miles west of Dugway Proving Grounds, Utah, at the same time. By 7 p.m. PDT today, the faster segment should be centered above central Montana, with the lower and slower segment centered above the Idaho-Wyoming border east of Idaho Falls.