Winter Storm — Monona, Iowa

2024-01-08 to 2024-01-09 · Monona, Iowa

Event narrative

An estimated 5 to 10 inches of snow fell across the county for this winter storm. The highest snowfall totals were in the western part of the county near the Missouri River. This includes a public report of 6 inches of snow in Little Sioux, and another public report of 10 inches of snow in Rosalie. In nearby Sioux City, over 11 inches of snowfall was observed. Patchy blowing and drifting snow persisted across the county into the early afternoon on the 9th.

Wider weather episode

A longwave trough over the western CONUS moved out into the central Plains on 1/8. At the surface, a deep low-pressure system developed in the Texas panhandle the morning of the eighth and tracked east-northeast into the mid-Mississippi river valley by the morning of the ninth.

Beginning three in the morning on the eighth, a mesoscale band of snow set up extending from Jefferson County into Thurston County. This band persisted for four to five hours before the main round of snow moved into Eastern Nebraska and western Iowa from the south. While heavy snow fell across most of eastern Nebraska for the duration of the event, dry air across portions of east-central Nebraska and southwest Iowa in combination with warm ground temperatures significantly delayed the onset of accumulating snow in and around the Omaha metro. Moderate to heavy snow bands traversed eastern Nebraska and western Iowa after midnight on the ninth and lasted through the morning hours. Strong wind gusts up to 40 miles per hour on the back side of the storm system led to patchy blowing and drifting snow across the entire county warning area.

Source: NOAA Storm Events Database, event_id 1158332. Narrative written by the NWS forecast office that issued the report.