Here we can see a weak and broad lee cyclone taking shape over Nebraska. A warm and moist airmass with temperatures in the 40s, dewpoints in the upper 30s and low 40s and winds from the south-southeast stretches across southern Iowa, most of Illinois, Missouri and eastern Kansas. A cooler, slightly drier airmass exists to the north of these areas, with winds coming from the east. Much colder and drier air exists behind and northwest of the low.

While we might guess that we have a developing warm front and a stationary front to the west, we actually have a cold front to the west and a warm front to the east. However, if we look again backwards a few hours, we see that neither one of these fronts has been moving significantly for long. Without examining this previous data it is tricky to identify the type of these two fronts for sure.