Download The Climate Impact Company medium/extended-range forecast for the U.S.
Pictured: The Climate Impact Company medium and extended-range temperature anomaly forecasts.
Through the next week and possibly into early August the tendency for severe thunderstorms and locally heavy rain affecting the southern half of Minnesota, southern third of Wisconsin to far northern Illinois and eastward to the northern Ohio Valley will continue. This zone is in-between the subtropical heat to the south and cool polar vortex over northern Canada. South of the rain belt a dry and hot climate is dominant and causes northwest/west Great Plains drought to try and extend eastward toward the Missouri Valley and southern Illinois.
The wet Upper Midwest/dry Mid-South regime likely changes as AUG/SEP arrives. The SSTA pattern identifies the reason. The cool pool of surface water in the northeast Pacific and north-central North Atlantic is fading. The cool pools of ocean water have contributed to transient upper troughs convening in the Great Lakes region the first half of the warm season. As waters warm AND tropical cyclone season evolves the warm/dry ridge affecting the west/north Great Plains and more recently the Mid-South will try to expand northward and could force widening drought.
Pictured: The global SSTA pattern and key (change) areas likely to influence late summer climate across the U.S.
