Iowa Weather Update: Active Stretch of Severe Weather Expected Across the State Through Tuesday

Iowans will need to stay weather aware over the next several days as an active pattern sets up across the Plains and Midwest. Multiple rounds of thunderstorms are expected from Friday through Tuesday, and several of those days could bring the risk for severe weather, including large hail, damaging winds, and tornadoes.

Forecast confidence on exact timing and storm placement will continue to change over the coming days, especially since storms on one day can impact what happens the next. However, the overall message is becoming clearer — Iowa is entering a prolonged stretch of storm chances with several opportunities for severe weather.

Friday: Increasing Severe Weather Risk Late Day Into Friday Night

After a quiet start to Friday, conditions are expected to become much more favorable for thunderstorms by late afternoon and especially Friday evening into the overnight hours.

Temperatures will surge into the upper 80s and even lower 90s Friday afternoon across parts of Iowa. That heat and increasing humidity will help fuel instability in the atmosphere. A weak warm front is expected to set up somewhere across the state, and thunderstorms could begin developing near that boundary later in the evening. The Storm Prediction Center says thunderstorms are expected to develop first across Nebraska before moving east toward Iowa Friday night.

The greatest severe weather risk Friday night currently appears to be south of Highway 30, where the Storm Prediction Center has outlined parts of western, central and southern Iowa in a Slight Risk (Level 2 of 5) for severe weather. Large to very large hail will be the main threat, followed by a secondary threat for damaging wind gusts.

Saturday: Stronger Storms Possible Across the Region

Another round of thunderstorms is possible across southern Iowa on Saturday, and some of those storms could become severe during the afternoon and evening hours.

Forecast confidence in the exact placement of storms remains somewhat uncertain, as Friday night’s thunderstorms may leave behind outflow boundaries that could influence where storms redevelop on Saturday.

The Storm Prediction Center continues to highlight portions of Iowa in a slight risk for severe weather on Saturday. Warm and humid air will remain in place across the state, and if enough sunshine develops during the day, the atmosphere could become increasingly unstable by late afternoon. Any storms that form could be capable of producing large hail, damaging wind gusts, and an isolated tornado.

While uncertainty remains somewhat higher compared to Sunday and Monday, Saturday is still a day Iowans should closely monitor for changing weather conditions and possible severe thunderstorm development.

Sunday: Severe Weather Outbreak Potential Increasing

Severe thunderstorms are possible across Iowa again on Sunday, especially during the afternoon and evening hours. The Storm Prediction Center has placed northwest Iowa under an Enhanced Risk (Level 3 of 5) for severe weather, with much of the rest of the state in a slight risk.

Warm, humid air combined with increasing wind shear and instability will create an environment favorable for severe thunderstorms Sunday afternoon and evening. Forecasters say thunderstorms that develop could quickly become supercells capable of producing tornadoes, very large hail, and damaging wind gusts.

Forecast models suggest the atmosphere across parts of Iowa could become extremely unstable by late afternoon, especially if enough sunshine develops during the day. In addition, a strengthening low-level jet Sunday evening may increase the tornado threat with any discrete storms that form ahead of larger storm clusters.

While northwest Iowa currently has the highest severe weather risk, severe storms may still be possible across other parts of the state as the system evolves through Sunday evening and into Sunday night.

Monday: Potentially the Most Significant Severe Weather Day

Monday currently appears to have the greatest potential for widespread severe weather across the region.

The Storm Prediction Center says a negatively tilted upper-level trough will move into the Plains while strong moisture, instability, and wind shear overspread the Midwest. This setup is often associated with significant severe weather events.

Thunderstorms are expected to develop Monday afternoon and evening and could become intense supercells capable of producing large to very large hail, damaging winds, and tornadoes. A severe weather outbreak is possible if current forecast trends continue.

Forecast details such as storm timing and exact locations will become clearer over the weekend, but Monday is definitely a day Iowans will want to pay close attention to.

Tuesday: Storm Chances Continue Along Advancing Cold Front

The active weather pattern is expected to continue into Tuesday, with the greatest severe weather threat potentially focusing across southeastern Iowa.

The Storm Prediction Center has placed portions of southeastern Iowa under a Slight Risk (Level 2 of 5) for severe thunderstorms as a cold front moves through the Midwest. Warm and humid air ahead of the front is expected to create enough instability for thunderstorms to develop during the afternoon and evening hours.

While forecast details this far out remain uncertain, southeastern Iowa currently appears to have the best chance of seeing organized severe thunderstorms by Tuesday afternoon and evening.

As with the rest of this active stretch, earlier rounds of storms could still influence the exact timing and placement of Tuesday’s severe weather threat.

Stay Weather Aware

One important thing to remember with prolonged severe weather patterns is that each round of storms can impact the next day’s setup. Areas that see heavy rain or widespread storms one night may temporarily stabilize the atmosphere the following day, while boundaries left behind by earlier storms can also help spark new severe thunderstorms later.

Because of this, forecast details will likely continue changing day by day.

The bottom line is that Iowa is entering a very active stretch of weather with daily thunderstorm chances from Friday through Tuesday, and multiple opportunities for severe storms.

Be sure to stay weather aware, especially if you have outdoor plans this weekend or early next week.

Continue checking IowaWeather.com for the latest severe weather updates, forecasts, and live coverage from the team. You can also download the ISCN Weather app for real-time radar, watches, warnings, and instant weather updates wherever you are.