Winter Weather — Delaware, Iowa

2011-11-09 · Delaware, Iowa

Event narrative

A trained spotter in Delaware County reported 3.5 inches of snow at 9 AM CST 2 miles southwest of Colesburg. Snow was continuing to fall. The Delaware County Emergency Manager relayed that there were over 60 traffic accidents in the area. One of these accidents resulted in a fatality.

Wider weather episode

A strong upper level disturbance lifting from west Texas into the mid Mississippi Valley brought widespread rain to eastern Iowa beginning late in the evening of November 7th and continued through the 8th and into the early morning hours of November 9th. As the upper level trough moved to the east in the early morning hours of November 9th colder air was drawn into the system and precipitation transitioned to snow from west to east along and to the north of Highway 30. The first snow of the season brought an average of 1 to 2 inches to this area with higher amounts in Delaware and Dubuque Counties. The timing of the snowfall caused some travel problems in this region. A Winter Weather Advisory was in effect across this region from the evening of November 8th to 9 AM on November 9th.

Source: NOAA Storm Events Database, event_id 354911. Narrative written by the NWS forecast office that issued the report.