Midwest Weekly Highlights - December 11-17, 2006
Winter Takes a Holiday
Precipitation this week was near to above normal from north-central Iowa into the Michigan UP, and from southeastern Missouri northeastward into southern lower Michigan (Figure 3). In between these two bands, precipitation ranged from next to nothing in southwestern Missouri to 25 percent of normal in western Minnesota and eastern Ohio. Snowfall this week was limited to northern Minnesota, Wisconsin, and the Michigan UP (Figure 4), and the few inches of snow that fell was well below normal for this time of December. Extreme drought still holds fast over northern Minnesota and Wisconsin, and an area of Moderate drought exists over a small part of southwestern Missouri (Figure 5).
Showers and Thunderstorms
Most of the rain that fell in the Midwest this week was associated with one frontal system that moved through the region at the beginning of the period. The front entered the Midwest on December 11 and pushed through the region on December 12 and 13 (Figure 6). During the afternoon of December 12 a line of showers thunderstorms developed over Illinois and moved eastward, at one point extending from southern Lake Michigan to south of the Ohio River. Some small hail occurred with some of the storms during the late afternoon. One-half inch or more of rain fell from Indiana into southern lower Michigan, with some locations receiving almost two inches over a two-day period. The heavy rain caused some minor flooding along the Little Wabash River in southeastern Illinois and southwestern Indiana.
The week ended with the passage of another cold front on December 17. This produced light showers from eastern Illinois through the northern half of Indiana and Ohio, and brought only slightly cooler weather.