Received a NUCAPS sounding in area relatively cloud free area and modified the sounding using the KISN metar of 88/52 degrees. This gave us a modified CAPE of 2343 J/kg (Fig1). Building confidence in convective developing based on current surface obs, and building cumulus field visibile on Super Rapid Scan Vis. (Fig 2).

Fig 1: 19Z NUCAPS Sounding near KISN (Williston, North Dakota)

Fig 2. Super Rapid Scan at about 20:25Z. Building Cu near Montana and N.Dakota.

Forecasters: Cattywampus/CoonieCatEye