The main part of the Corn belt is going to get some help with heat over the next couple weeks while the northern and western corn belt will hold steady or lose ground compared to average on GDD accumulation.

The 8-14 day outlooks have been consistent over the last few days holding in a ridge of the main part of the corn belt.  This situation will allow above average temperatures during this period.  The additional heat will be very beneficial for the development of corn, which has been lagging a little through the season in certain places.  See the 8-14 day outlook:

http://www.cpc.ncep.noaa.gov/

Northern areas of the Corn belt have been running further behind development throughout the year and have acres that are at risk of not reaching maturity or being harvested at very high moisture content based on the freeze date and additional heat through the rest of the season.

If you wish to check where you corn crop sits with current development check out this tool from the USDA – AFRI funded U2U group:

https://mygeohub.org/groups/u2u/decision_resources

This tool allows you to check development based on your location, planting date and variety.  Updated daily it gives you the chance to check conditions anywhere in the corn belt.

The most recent outlook will not help with the slower development across the northwestern corn belt.  This area will need to have a longer period this fall to reach maturity and dry down.