Hot weather resulted in daily episodes of clusters of storms with damaging winds, isolated hail, and some areas of flash flooding from August 12 through August 18th. The most widespread activity occurred August 15th, and 18th, when several lines of storms moved through the area.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS DVN wrote it up.
Hot weather resulted in daily episodes of clusters of storms with damaging winds, isolated hail, and some areas of flash flooding from August 12 through August 18th. The most widespread activity occurred August 15th, and 18th, when several lines of storms moved through the area. Late on August 11th, a long lived supercell storm, resulted in a tornado in Van Buren County. This tornado produced visible damage on satellite through crops, but produced no other reported damage to base a exact rating.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before the first event at Aug 11, 5:42 PM CST, 4 hours 23 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Quad Cities IA IL 642 PM CDT Mon Aug 11 2025 .KEY MESSAGES... - We will continue to see persistent chances for showers and storms through the area tonight and Tuesday morning. While the severe threat is low, there remains a nonzero threat for an isolated strong/severe storm. - "Cold" front passes through late Tuesday, leaving us with high pressure and more pleasant dewpoints. Temperatures will still remain seasonably warm through the week. - We will remain largely dry for the remainder of the week after Tuesday, with precipitation chances increasing late in the weekend and beyond. && .SHORT TERM /THROUGH TUESDAY/... Issued at 219 PM CDT Mon Aug 11 2025 Active weather continues through tonight, as an MCV tracks nearby. This MCV is a result of the overnight/morning MCS that decayed over portions of KS/MO. With southwest flow set up over the Upper Midwest, the MCV will track northeast from northwest MO through central IA this evening. Ahead of this, we will see a weak band of forcing coming through the area. This morning, we saw scattered showers/storms with this, but that activity has died off. While guidance isn't picking up on the shower/storm potential, I cannot say that we will be completely dry through the afternoon. Rather, with this coming through during peak heating, I think we will see isolated showers/storms again, similar to what we saw this morning. Current guidance indicates this band of forcing coming through mid- afternoon and being situated near Interstate 80 at that time. Thus, I would say that there will be a 15-30% chance for showers/storms between 3-6pm. Confidence on this will be low, largely because there are some factors that may limit coverage/initiation of convection this afternoon, such as residual cloud cover. Thus, will have to continue to monitor mesoscale trends this afternoon for any storms chances. Aside from the low-end storm chances this afternoon, we will see temperatures in the low-mid 80s once again, with dewpoints remaining in the low 70s throughout. Thus, another warm and humid day is being seen. This evening and tonight, we will continue to see influence from the passing MCV. With that, we will still have a boundary draped over our area, roughly along the Mississippi River. This, along with bouts of energy passing through the area ahead of the main shortwave, will increase shower/storm potential this evening and through the night. Better confidence in thunderstorm coverage will be around the midnight hour and beyond, as that will be when the best forcing moves in. With the main shortwave remaining west of the area, we will see another LLJ set up over the area tonight as well. Thus, this will further supply moisture and LLVL forcing, favoring a continuation of the storm threat through tonight. This activity will largely be focused along the aforementioned boundary, but scattered convection cannot be ruled out for the remainder of the area. Although, those located along the stalled boundary will see the potential for repeating rounds of storms tonight. Not only will PWATs around 1.75-2.00"+ favor heavy rainfall in any storm, but areas that see repeated rounds of storms will see a flash flood threat. Some CAMs are highlighting the potential for 1-2" of rain in the hardest hit areas, with locally higher amounts possible. These shower/storm chances will remain through the night, slowly pushing east through Tuesday morning. Guidance shows plenty of dry time tonight, but we are not confident in that, with such forcing and moisture pooling over the area. Thus, opted to largely hold 30-60% PoPs through the night. While we are not outlooked for severe weather, I wouldn't discount the low-end chance for a strong to severe storm. Some CAMs are highlighting a complex coming through that can produce some locally gusty winds, some of which may be severe. Again, this seems to be largely focused at locations along the Mississippi River at this time. Otherwise, it will remain cloudy, gloomy, and mild through the night, with temperatures around 70. Tomorrow, we will finally start to see the main shortwave trek east across the area. Through the morning and early hours of the afternoon, we may continue to see scattered shower/storm activity as the wave and weak cold front pass through the area. This will largely be focused in areas along/east of the Mississippi River. By mid-late afternoon, much of this activity should be in our far east, if not already out of our area. Temperatures will remain in the mid 80s throughout, with humidity remaining higher until the evening/night. && .LONG TERM /TUESDAY NIGHT THROUGH MONDAY/... Issued at 219 PM CDT Mon Aug 11 2025 Tuesday night, we will finally see the shortwave move east of our area, with upper level northwest flow kicking in. Wednesday, we will see this northwest flow dominate aloft and LLVLs, as a weak upper ridge builds over central Iowa. Surface high pressure will settle in at this point, with a post frontal airmass and dry advection moving in. Thus, we will finally see more pleasant humidity values work in midweek and through much of the second half of the work week. Moisture will be the main change in airmass that we see, as we will continue to see temperatures in the mid 80s through Thursday. Thursday and beyond, we see the surface high pressure move off east of the area, with southerly return flow kicking in for the end of the work week. With that, we will see temperatures rise into the upper 80s to near 90. This timeframe will be characterized as dry and hot, with passing clouds. The weekend and beyond, we see LLVL southwesterly flow increase over the area again, with warm advection allowing for higher humidity air to work in, as well as increase the temperatures. Upper 80s to low 90s will remain through the weekend, with humid conditions, making it feel a little unpleasant again. Current forecast hints at the potential for heat indices around 100 for some. While we will see moisture increase through the area, the corridor of strongest southwesterly flow will remain west of the area, keeping the best moisture and forcing west of the area. Thus, precipitation chances remain low (<30%) for now, with spatial coverage limited at this time. Storm track currently seems to be north and west of the area, but will come close enough that the current PoPs are largely confined to our northern counties. This pattern will slowly shift easterly though, introducing more widespread chance PoPs (30-40% chance) Sunday through Monday. Thus, this will be something to monitor over the next few days, as an active pattern will set up somewhere over the Upper Mississippi River Valley late this weekend and into next week. && .AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/... Issued at 629 PM CDT Mon Aug 11 2025 VFR conditions are forecast to start the period. A developing low level jet tonight plus a storm system moving across the area will lead to showers and thunderstorms developing in the 3 to 9 UTC window and continuing through sunrise. MVFR to IFR ceilings and visibilities are possible with the strongest storms. MVFR ceilings are forecast to linger into the afternoon before lifting. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...None. IL...None. MO...None. && SHORT TERM...Gunkel LONG TERM...Gunkel AVIATION...Cousins
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 251 PM CDT Mon Aug 11 2025 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-122000- Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 251 PM CDT Mon Aug 11 2025 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...THIS AFTERNOON AND TONIGHT Scattered showers and storms will develop this evening and last through the night. While not outlooked, an isolated strong to severe storm cannot be ruled out. Primary threats with these storms will be heavy rain, frequent lightning, and gusty winds. Heavy rainfall and repeating storms over some areas may result in localized flash flooding. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Isolated to scattered showers and storms will continue through the day Tuesday, diminishing through the afternoon. Main hazards will be heavy rain and lightning. Hot and humid conditions return late this week, with some seeing heat indices around 100 Friday and Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated for today and tonight. TG
The Quad Cities radar (KDVN), 133 km away, was scanning. The volume nearest the first event began at 04:03 UTC.
1 tornado, 1 thunderstorm wind. Local standard time, as filed.
Satellite data shows an EF-U tornado path through crops at this location. This tornado did not hit any structures along its 2.2 mile long path.
A large tree was snapped near base with several other tree branches down at Kent Stein Park. Time estimated from radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2025Every state in 2025This day in weather historyThe tornado archive for Iowa, 2025Warnings in Iowa, August 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1277281, 1275165.