Hydrologic Outlook
Until 2024-11-04T14:00:00-06:00 • National Weather Service
ESFLOT An approaching storm system will interact with a record moist and unseasonably warm air mass to bring the threat of locally very heavy rainfall tonight. While there are uncertainties exactly where, there are indications that a swath of 2 to potentially over 4 inches of rain could occur somewhere over northern Illinois tonight. Despite the ongoing drought and resultant low stream flow and below average soil moisture; if rainfall on the higher end of the forecast range were to occur, it would likely result in flash flooding, particularly of low lying and flood prone areas. If rainfall totals on the lower end of the forecast range were to occur, some minor flooding could still occur. Very heavy rainfall and flash flooding are possible, but not yet certain. Persons should closely monitor forecasts including the possibility of flood watches, warnings, and advisories. Clear storm drains and gutters of leaf debris to allow storm waters to drain.
Until 2024-11-04T14:00:00-06:00 • National Weather Service
ESFLOT An approaching storm system will interact with a record moist and unseasonably warm air mass to bring the threat of locally very heavy rainfall tonight. While there are uncertainties exactly where, there are indications that a swath of 2 to potentially over 4 inches of rain could occur somewhere over northern Illinois tonight. Despite the ongoing drought and resultant low stream flow and below average soil moisture; if rainfall on the higher end of the forecast range were to occur, it would likely result in flash flooding, particularly of low lying and flood prone areas. If rainfall totals on the lower end of the forecast range were to occur, some minor flooding could still occur. Very heavy rainfall and flash flooding are possible, but not yet certain. Persons should closely monitor forecasts including the possibility of flood watches, warnings, and advisories. Clear storm drains and gutters of leaf debris to allow storm waters to drain.
