Strong to severe storms developed during the afternoon and evening ahead of a cold front approaching from the northwest. Numerous reports of wind gusts over 60 mph and damage to trees and powerlines occurred across extreme southeastern Kansas.
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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 SGF wrote it up.
Strong to severe storms developed during the afternoon and evening ahead of a cold front approaching from the northwest. Numerous reports of wind gusts over 60 mph and damage to trees and powerlines occurred across extreme southeastern Kansas.
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 Springfield, MO wrote its last area forecast discussion before the first event at Jun 11, 1:42 PM CST, 3 hours 21 minutes earlier.
Area Forecast Discussion National Weather Service Springfield MO 242 PM CDT Fri Jun 11 2021 .SHORT TERM...(This evening through Saturday) Issued at 146 PM CDT Fri Jun 11 2021 As of 2 PM, a line of strong to severe thunderstorms was located across northwestern Missouri and northeastern Kansas. This line of storms is beginning to make the turn to more of a south-southeast direction. Over the next few hours, we are confident that this line of storms will begin to accelerate in more of southerly direction as cold pools continue to strengthen and conglomerate. There are indications that this is already taking place with multiple mid- altitude radial convergence (MARC) signatures showing up on the KOAX and KEAX radars. This supports descending rear inflow jet structures which will accelerate and enhance the cold pools. Additionally, the atmosphere ahead of the line remains very unstable with MLCAPE values of 3000 to 4500 J/kg. These high amounts of instability are due to a very warm and rich low-level airmass beneath steep mid-level (500-700 mb) lapse rates. Very high 0-3 km theta-e differentials are in place (35 to 40 Kelvin) which will also support strong cold pools. With this being said, confidence is high that this line of storms will accelerate south with a threat for 70+ mph winds across southeastern Kansas and western Missouri late this afternoon and early this evening. The eastern extent of the line still remains somewhat in question as a capping inversion is likely in place. However, favorable orientations of 0-3 km bulk shear vectors will aid parcels in overcoming the level of free convection, even in areas that are somewhat capped. We have released a 19Z RAOB and will get a better feel for that capping shortly. In addition to the wind threat, some large hail will be possible with stronger cells contained in the main line. Torrential rainfall rates are also expected given very high moisture content in the atmosphere. The good news is that this line should be very progressive, thus residence time of the highest rain rates should be relatively short. By later tonight, most of the storms should have exited the region. We may still see some isolated activity around depending on how outflow lays out. Lows overnight should drop into the upper 60s to lower 70s with the thunderstorm outflow knocking down temperatures quicker than a typical summer evening. A weak front will then drop southeast through the area on Saturday. This front may trigger a few non-severe thunderstorms across primarily south-central Missouri. Saturday still looks relatively warm and muggy with most areas warming into middle 80s to near 90 degrees. .LONG TERM...(Saturday Night through Friday) Issued at 146 PM CDT Fri Jun 11 2021 Relatively benign weather is expected for much of next week as an upper level high strengthens over the western U.S. Global models and ensembles show good consensus that the center of this high will set up over the Four Corners region. This will put the Missouri Ozarks in a north-northwest flow aloft. The early week period looks dry with weak synoptic scale subsidence in place in addition to a drier low-level air mass. There is then a weak signal for some MCS potential next Wednesday or Thursday. Slightly better chances for thunderstorms may arrive late in the week as a cluster of ensemble members bring a cold front into the region. Temperatures next week will generally be near or slightly above normal values for the middle of June with highs in the middle 80s to lower 90s. && .AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon) Issued at 1128 AM CDT Fri Jun 11 2021 A line of strong to severe thunderstorms will push south across southern Missouri late this afternoon and early this evening. Confidence is increasing that this line of storms will bring wind gusts that exceed 40 knots. Some large hail will also be possible. Local IFR conditions are also expected due to torrential rainfall. Once the line of storms exits later this evening, mainly VFR conditions are expected overnight and early Saturday morning. Some light fog will be possible if clouds can manage to clear, but confidence is low at this point. MVFR ceilings may then develop by mid-morning on Saturday as cumulus clouds rapidly develop. && .SGF WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE. && SHORT TERM...Schaumann LONG TERM...Schaumann AVIATION...Schaumann
Hazardous Weather Outlook National Weather Service Springfield MO 324 PM CDT Fri Jun 11 2021 KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-122030- Bourbon-Crawford-Cherokee-Benton-Morgan-Miller-Maries-Vernon- St. Clair-Hickory-Camden-Pulaski-Phelps-Barton-Cedar-Polk-Dallas- Laclede-Texas-Dent-Jasper-Dade-Greene-Webster-Wright-Newton- Lawrence-Christian-Douglas-Howell-Shannon-McDonald-Barry-Stone- Taney-Ozark-Oregon- 324 PM CDT Fri Jun 11 2021 This Hazardous Weather Outlook is for portions of the Missouri Ozarks and extreme southeast Kansas. .DAY ONE...This Afternoon and Tonight. Weather hazards expected... Limited hail risk. Elevated thunderstorm wind damage risk. Limited flooding risk. Significant lightning risk. Limited excessive heat risk. DISCUSSION... Afternoon heat index values will range from 100 to 105 degrees across most of the area. A line of strong to severe thunderstorms will rapidly move south across western Missouri and southeast Kansas from late this afternoon into this evening. Damaging wind gusts in excess of 70 mph, frequent lightning, and brief torrential rainfall will be the primary potential hazards with these storms. Hail to the size of half dollars will also be possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Isolated to scattered thunderstorms will remain possible on Saturday, mainly across south-central Missouri. Cloud to ground lightning will be the main potential hazard. Afternoon heat index values will range from 100 to 105 degrees across south central Missouri Saturday afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed late this afternoon and this evening across western Missouri and extreme southeastern Kansas. && More detailed information can be accessed at: http://www.weather.gov/sgf/sitrep This product in graphical format...along with other weather... hydrological and climate information...at http://www.weather.gov/sgf Schaumann
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
534 PM CDT FRI JUN 11 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0533 PM TSTM WND GST 3 WNW COLE CAMP 38.48N 93.25W
06/11/2021 M64 MPH BENTON MO MESONET
MESONET STATION FW3737 COLE CAMP.
&&
TEOPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SPRINGFIELD MO
546 PM CDT FRI JUN 11 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0533 PM TSTM WND GST 3 WNW COLE CAMP 38.48N 93.25W
06/11/2021 M64 MPH BENTON MO MESONET
CORRECTS PREVIOUS TSTM WND GST REPORT FROM 3
WNW COLE CAMP. MESONET STATION FW3737 COLE
CAMP. WIND IS FROM 332 DEGREES.
&&
TEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
553 PM CDT FRI JUN 11 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0549 PM TSTM WND GST 3 SSW LINCOLN 38.35N 93.35W
06/11/2021 M59 MPH BENTON MO AWOS
WIND GUST OF 59 MPH. WIND IS FROM 360
DEGREES. WARSAW MUNICIPAL AIRPORT.
&&
TEOThe Pleasant Hill radar (KEAX), 123 km away, was scanning. The volume nearest the first event began at 23:05 UTC.
11 thunderstorm wind. Local standard time, as filed.
Several Highway signs were blown over.
A KSU Mesonet site reported a 63 Knot wind gust.
A large tree was reported down blocking both lanes of traffic at 660 Road and Highway 3.
Several power lines were reported down in town.
Power lines were reported down that caused a fire at 680th Road and 130th Road.
A large tree was reported down.
A large tree was reported down on power lines at the intersection of 520th and 200th Roads.
Numerous limbs up to 4 inches in diameter were reported down.
A large 3 foot diameter silver maple was reported uprooted and blocking Highway 126.
Winds estimated at 75 mph downed power lines and multiple large limbs.
Several large trees were downed by high winds across the city. Some minor roof and structural damage was reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kansas in 2021Every state in 2021This day in weather historyWarnings in Kansas, June 2021
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: 966196, 966871, 966216, 966219, 966223, 966225, 966226, 966228, 966231, 966872, 966247.