During the morning of June 7th, training thunderstorms caused flooding across nearly the entire southern half of Boone County. Most of the flooding consisted of inches of water over roadways and flooded creeks.
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 LSX wrote it up.
During the morning of June 7th, training thunderstorms caused flooding across nearly the entire southern half of Boone County. Most of the flooding consisted of inches of water over roadways and flooded creeks. That afternoon through evening, additional thunderstorms exacerbated the problem, creating even more dangerous conditions through the morning of the 8th.
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 St. Louis, MO wrote its last area forecast discussion before the first event at Jun 7, 5:28 AM CST, 4 hours 10 minutes earlier. Its key messages:
Area Forecast Discussion...Updated Aviation National Weather Service Saint Louis MO 628 AM CDT Sun Jun 7 2026 .KEY MESSAGES... - Scattered showers and thunderstorms capable of locally heavy rainfall are expected today and tomorrow across the area. - This afternoon, thunderstorms will be capable of isolated instances of damaging wind gusts across central and southeastern Missouri. - Heat and humidity build into the region Tuesday through Thursday, with highs reaching the 90s and heat index values near 100 degrees. && .SHORT TERM... (Through Monday Night) Issued at 239 AM CDT Sun Jun 7 2026 Water vapor imagery this morning shows a cutoff upper-level low slowly moving east-northeastward across Kansas and Oklahoma. This cutoff is providing weak lift that is pairing with a subtle low- level jet to produce the ongoing showers across portions of western and central Missouri. As this cutoff continues its east-northeastward trajectory through the day, instability will build over the Middle Mississippi Valley. Both the 00z HREF and REFS show 1,500-2,000 J/kg of SBCAPE across the CWA during peak heating; primarily focused over central and southeastern Missouri. Here, deep-layer shear is progged to be greater than it has been in days past, with guidance consensus showing 25-30 kts across the same portion of the CWA. While the instability and nebulous forcing from the cutoff will lead to a threat of isolated to scattered showers and thunderstorms capable of locally heavy rainfall this afternoon across the entire CWA, the environment over central and southeastern Missouri will be particularly favorable for isolated strong to severe thunderstorms. The primary severe threat here is damaging wind gusts. Confidence is low in severe-sized hail thanks to skinny CAPE profiles in the hail growth zone noted in several deterministic soundings, and tornadoes are not expected thanks to weak low-level shear. Convective coverage and strength will diminish this evening with the loss of daytime heating, though the nebulous forcing from the cutoff aloft will keep the chance for isolated showers and weak thunderstorms going through the overnight hours. Tomorrow, the cutoff will begin to shear apart over the Middle and Upper Mississippi Valley, with its southern portion slowly moving into the Ohio Valley. With enough of the cutoff still overhead through the day, nebulous lift paired with roughly 2,000 J/kg of SBCAPE will produce another round of scattered showers and thunderstorms. Despite an uptick in instability, deep-layer shear is forecast to not be as robust compared to today. Therefore, confidence is very low in a threat of severe thunderstorms, and we will hold off on publicly messaging the SPC Day 2 Marginal. Elmore && .LONG TERM... (Monday Night through Saturday) Issued at 239 AM CDT Sun Jun 7 2026 The cutoff/shortwave that has been plaguing the area through the weekend and early week period will be departing the Middle Mississippi Valley eastward on Tuesday per guidance consensus. There is a low chance (30%) that the wave will still be close enough to the CWA during peak heating to produce isolated to scattered convection across south-central Illinois. The main story with the departing wave will be upper-level ridging building into the Midwest, giving the region its first taste of summer-like heat and humidity. Tuesday is expected to be notably muggier than Monday, with ensemble high temperatures clustering around 90 degrees. Confidence is increasing that this heat will peak on Wednesday, though to what degree remains uncertain. Guidance varies enough on the strength of the ridge against a trough moving eastward across the central CONUS to produce a roughly 5-degree spread between the 25th and 75th percentile of ensemble temperatures. Relatively cooler solutions thanks to a stronger trough would keep temperatures similar to those forecast on Tuesday, while a stronger ridge will yield a several degree bump. The current forecast/NBM continues to favor the latter solution, and this should be seen as a reasonable worst-case scenario. From Thursday through Saturday, guidance consensus is that the upper- level trough expands eastward as it broadens, pushing the ridge southward. A leading shortwave within the trough will send a cold front through the Middle Mississippi Valley sometime late Thursday or Friday. This front will bring an end to the forecasted heat as we move into the weekend, with a majority of ensemble guidance signaling a notable drop in temperatures. Elmore && .AVIATION... (For the 12z TAFs through 12z Monday Morning) Issued at 622 AM CDT Sun Jun 7 2026 Another round of scattered showers and thunderstorms is expected across the region today, but confidence is low in specific timing at each of the local terminals. There is a low chance for impacts through much of the daylight hours today, with impacts from showers and thunderstorms potentially continuing overnight at KCOU and KJEF. MVFR stratus is expected tonight, though how low ceilings get is uncertain. There is a very low chance that ceilings could drop below 2kft at any of the local terminals. Stratus that develops overnight is expected to lift and dissipate tomorrow morning. Elmore && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
The St Louis radar (KLSX), 150 km away, was scanning. The volume nearest the first event began at 15:38 UTC.
5 flood, 4 flash flood. Local standard time, as filed.
Up to 3 feet of water covered numerous roadways throughout Boone County extending from Sturgeon to MO Route Y at Cedar Creek, including Columbia. Northland Drive at Bear Creek was closed due to flooding, and water entered an apartment on the 1800 block of Sylvan Lane in Columbia.
Numerous roads from US-40 south in Columbia had several inches of water covering them. Hinkson Creek flooded Recreation Drive at a low water crossing. Further south near Ashland, from 5 inches to 3 feet of water covered roadways.
There were numerous reports of flash flooding between California and High Point, including flooded yards and roadways.
Flash flooding caused two swift water rescues in Columbia with three individuals rescued in total. No injuries were reported.
The South Moreau Creek and Moreau River flooded over and spilled water onto Scrivner Road and Loesch Road, respectively. A car tried to drive through the flooded Scrivner Road hours after the rain ended, and was swept from the roadway. Zion Road east of Eberhardt Cemetery and the 6000 block of Buffalo Road also flooded.
The South Moreau Creek and Moreau River flooded over and spilled water onto Scrivner Road and Loesch Road, respectively. A car tried to drive through the flooded Scrivner Road hours after the rain ended, and was swept from the roadway. Zion Road east of Eberhardt Cemetery and the 6000 block of Buffalo Road also flooded.
A 40 yard section of the main road through Camp Wyman was impassable due to moving water for about 40 minutes.
Up to 5 inches of rain fell in Franklin County, resulting in flash flooding in Sullivan. Water flowed over Highway 85 near Deer Path Crossing and North and South Road. There were also several photos of standing water in residential areas of town. Impacts streets include Mervin, Blair, and Fisher and other unnamed roads.
Route E north of Columbia was closed due to flooding on Perche Creek. Highway Z was closed due to flooding on Hominy Creek.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2026Every state in 2026This day in weather historyWarnings in Missouri, June 2026
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: 1334156, 1334154, 1334159, 1334158, 1334161, 1334162, 1334164, 1334163, 1334160.