A large, complex storm system will generate additional late-season snow in the central Rockies, while a mixture of rain and wet snow falls from the central High Plains into the Dakotas and Upper Midwest.
Two periods of possible severe weather exist.
The first will be late Wednesday night as a warm front moves north through Illinois. Large hail and strong winds will be possible.
Once again, farmers across much of Illinois enjoyed excellent weather conditions last week. Many producers were able to finish planting corn and start planting and drilling soybeans.
Several weather disturbances will move across the Plains and Midwest this week, resulting in periods of showers and thunderstorms through Friday.
Based on preliminary data, the statewide average temperature for Illinois in April was 58.4 degrees, 6.2 degrees above normal and the warmest April on record. This beats the old record of 58.2 degrees set in 1955. Official statewide average temperature records go back to 1895. The warm temperatures in April were not unique to Illinois – the entire Midwest was much above normal.
A changeable weather pattern is ahead in the days ahead.
As a warm front approaches from the southwest, a few showers and thunderstorms will occasionally overspread area during Friday morning as an intensifying low pressure system moves across the Midwest.
Across the Corn Belt, cool, unsettled weather across northwestern portions of the region is slowing fieldwork. Dry, mild weather elsewhere is favoring a rapid pace of summer crop planting and emergence.
Scattered showers and thunderstorms are expected Monday and Monday evening ahead of a weak cold front approaching from the west.