Moderate to Heavy Rainfall Expected Across the Region

A major convective and moderate to heavy rainfall event is taking shape, from the central into the southern Plains states, and into the Midwest. A very strong mid and upper level trough of low pressure, will move into the Plains on Tuesday night. The low pressure aloft will move from the Great Basin of Utah this morning, then into the central Rockies this afternoon. This low pressure aloft will close off along the eastern Colorado/western Kansas border by this evening, pushing slowly across central Kansas by midnight. This low pressure area will then move very slowly eastward, progressing eventually into eastern Kansas by late Wednesday evening.

Very strong moist inflow of moisture from the Gulf of Mexico will occur as this storm system progresses. The axis of heaviest rainfall is expected to lie from northeastern Colorado thorugh western Nebraska, into western Iowa and northern Missouri - along and north of a quasi-stationary warm frontal boundary.

Widespread rainfall is expected across much of the central Plains and southern Plains, into the Midwest, through Wednesday.

Heavy rainfall will add to already record flooding along the North Platte River, swelling the river higher as the rainfall continues to accumulate.