Updated
Updated · KCRG · Aug 9
Eastern Iowa Faces 100-Degree Heat Index as Severe Storms Threaten Through 8 PM
Updated
Updated · KCRG · Aug 9

Eastern Iowa Faces 100-Degree Heat Index as Severe Storms Threaten Through 8 PM

3 articles · Updated · KCRG · Aug 9

Summary

  • Upper 90s to 100-degree heat index values are expected in southeast Iowa Sunday, where a Heat Advisory remains in effect until 8 PM and KCRG has declared a First Alert Day.
  • Showers and storms moving across eastern Iowa should clear by 1 PM, but how quickly they exit will determine whether the atmosphere can recover enough for stronger afternoon and evening storms.
  • Damaging winds and heavy rain are the main threats if storms redevelop along a low-level jet later today, with isolated large hail and a tornado considered lower-probability risks.
  • Storm chances continue overnight and into Monday morning before skies turn mostly sunny by evening, while muggy dew points in the mid-70s persist through Wednesday.
  • Temperatures are expected to ease into the mid to upper 70s by Friday, with daily rain chances through the workweek, a drier next weekend, and unsettled weather returning early the following week.

Insights

How will the dangerous mix of near-100 degree heat and incoming cold fronts test Eastern Iowa's infrastructure tonight?
Could morning rain actually save Eastern Iowa from a severe afternoon storm outbreak, or is the worst yet to come?
With a broader regional outbreak looming, will the low-level jet splitting Iowa trigger unexpected tornadoes despite forecasters' doubts?