Lots of colorful 👇 charts here so be prepared!
We were coming off of an extremely wet April. Temperatures were slightly above normal. 7 of the last 10 days had measurable rainfall. Back in late April the changes in the tropical Pacific (SOI drop), northern Atlantic (negative NAO) and Bering Sea Low pressure were strongly pointing to a cooler than normal start to May.
|May 1 to May 7|
|May 8 to May 14|
|May 15 to May 21|
By the final week of May, two pronounced jet stream tracks kept storm systems away from the central keeping the mid-west and corn belt very dry.