textproduct: Des Moines

KEY MESSAGES

- Locally heavy rainfall with isolated flash flooding risk over southern Iowa today. Rounds of rain and storms over southern into portions of central Iowa this morning drifting southeastward through the day. Much of the rainfall is over for southern Iowa by this evening.

- Below average temperatures the rest of the work week, followed by warming temperatures and storm chances.

LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/

Issued at 251 PM CDT Tue Aug 4 2026

In the extended, temperatures will stay near to below average through the end of the work week and 90 degree highs will try to make a return over the weekend. The region will be locked in northwest flow which keeps thunderstorm chances in play.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/

Issued at 1228 AM CDT Wed Aug 5 2026

Widespread MVFR to IFR conditions are expected through much of this TAF period, especially over southern Iowa. Fog is possible in some areas tonight following showers from Tuesday evening. Additional showers and thunderstorms are moving into western Iowa and are expected to increase in coverage through the morning hours Wednesday, eventually impacting all terminals. The lowest confidence in impacts would be at KMCW with uncertainty in the northern reach in this activity. With these showers, lowered ceilings will follow and prevail through most of the day Wednesday. Dry air will enter the state from the north, which will lead to ceilings raising rapidly as skies clear. With this, the potential for fog enters the forecast towards the end of this TAF period.

DMX WATCHES/WARNINGS/ADVISORIES

Flood Watch through this evening for IAZ086-096-097.