A band of snow showers moved across southeast Minnesota and northeast Iowa Monday morning. After the clouds cleared, the snow showers left an interesting stripe across the area. 0.3 inches of snow was reported within this band with visibilities falling to around 2 miles. The image above shows radar imagery (left) and visible satellite imagery (right). The red highlighted area is the band of snowfall. The darker areas in the visible satellite imagery are locations without snow cover while the patchy white areas are cumulus clouds.
The band of snow originated across north central Minnesota near Lake Mille Lacs. A cold air mass was moving into the area Monday morning. The cold air moving over the open waters of the lake may have played a role in enhancing this band of snow, much like Lake Effect Snow across the Great Lakes. However, it is difficult to trace this band directly to the lake just using radar. Lake Effect Snow occurs in the lower levels of the atmosphere and the radar beam tends to sample higher than this activity.