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 portions of southwest Missouri.
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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 portions of southwest Missouri.
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, 2 hours 38 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
The Pleasant Hill radar (KEAX), 89 km away, was scanning. The volume nearest the first event began at 22:19 UTC.
24 thunderstorm wind, 4 flash flood, 3 hail. Local standard time, as filed.
Numerous limbs were reported down along with several one to two foot diameter trees. Several power poles were reported leaning or broken with siding off a few homes. Winds were estimated at 60 to 70 mph lasting about 25 minutes.
The Mesonet station FW3737 reported a 53 Knot wind gust from the northwest.
The AWOS at the Warsaw Municipal Airport reported a 59 mph wind gust.
Half dollar sized hail was reported.
Numerous power outages were reported from high winds. Power lines and poles were down.
Several power lines were reported down along Highway D.
Several power lines were reported down in town.
Quarter sized hail was reported.
Six large trees were reported uprooted.
Several trees were reported down near the intersection of Dude Ranch Road and Ledges Drive.
Several large tree limbs were reported down. One limb fell on a vehicle causing significant damage.
Quarter sized hail was reported.
Several large limbs were reported down on power lines causing power outages.
High winds blew over one to two foot diameter trees, and pushed a garage door off its tracks.
A large tree was uprooted along Farm Road 146.
A large tree was reported down on Fir Road and County Road 300 blocking traffic.
Multiple large limbs were reported down in town.
Multiple large limbs were reported down and minor damage to a few outbuildings was reported.
A low water crossing was flooded and impassable near Goodhope. Pictures of the flooding were sent by an amateur radio operator.
Water was reported flowing over the road at Highway 125 and County Highway D.
Numerous large limbs were reported down on power lines causing widespread power outages.
A large tree was uprooted and blocking the road on JJ Highway. Additional trees were blocking Highway 95 between Highway 5 and Thornfield.
Several large tree limbs were reported down near the George Washington Carver National Park.
Several trees and power lines were reported down in town along Highway 160.
Multiple large limbs were down on powerlines causing several hundred power outages.
Heavy rain produced flooding on Highway 5 and County Road 413 Just south of Ava. A vehicle was reported stalled in the high water. All passengers escaped safely with no injuries.
A large tree was reported down blocking traffic on Highway AA 2 miles from Highway 181.
Two large trees were reported down on Highway O near the intersection with County Road 551.
A large tree was down on a powerline on Farm Road 1107.
A large tree was reported down across Highway PP between James Bridge and Highway 160.
A vehicle was stranded in high water over Highway 5 and County Road 413 south of AVA. No injuries were reported and all occupants self rescued. The road was impassable due to the high water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2021Every state in 2021This day in weather historyWarnings in Missouri, 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: 966270, 966873, 966274, 965117, 966271, 966273, 966278, 965118, 966880, 966275, 966890, 965119, 966877, 966874, 966875, 966876, 966878, 966879, 965120, 965121, 966881, 966885, 966889, 966882, 966883, 965122, 966888, 966886, 966884, 966887, 966266.