Dubuque-Jackson-Jo Daviess-Stephenson-Carroll-
Including the cities of Dubuque, Freeport, Mount Carroll, Galena, and
Maquoketa
123 AM CDT Fri Sep 18 2026

…FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
EVENING…

• WHAT…Flooding caused by excessive rainfall is possible.
• WHERE…Portions of northwest Illinois, including the following
  counties, Carroll, Jo Daviess and Stephenson and Iowa, including
  the following counties, Dubuque and Jackson.
• WHEN…From late tonight through Saturday evening.
• IMPACTS…Excessive runoff may result in flooding of rivers,
  creeks, streams, and other low-lying and flood-prone locations.
  Flooding may occur in poor drainage and urban areas.
• ADDITIONAL DETAILS…
• Widespread showers and storms are expected to develop late
  tonight and last into Saturday. These storms will be capable of
  rainfall rates between 1-2 inches per hour. Rainfall totals of
  1-3 inches are likely through Saturday evening with the potential
  for localized areas of 3+ inches.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

You should monitor later forecasts and be alert for possible Flash
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.