An large supercell thunderstorm moved through far northern KS early on June 29th, producing mainly strong winds in excess of 70 mph and large hail.
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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 TOP wrote it up.
An large supercell thunderstorm moved through far northern KS early on June 29th, producing mainly strong winds in excess of 70 mph and large hail.
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 Topeka, KS wrote its last area forecast discussion before the first event at Jun 29, 2:10 AM CST, 2 hours 45 minutes earlier.
Area Forecast Discussion National Weather Service Topeka KS 310 AM CDT Thu Jun 29 2023 .MESOSCALE DISCUSSION... Issued at 310 AM CDT Thu Jun 29 2023 A quasi-stationary frontal boundary stretches across northern Kansas this morning, currently along a line from Ottawa to Brown Counties. To the north of this front, increased low-level moisture and cooler mid-level temperatures have led to a west/east axis of instability. Deep convection that developed yesterday evening is moving across southwest Nebraska, following the instability axis eastward. These supercell clusters will continue to move east early this morning. With strong instability and shear still in place ahead of them, the storms should maintain a risk for large hail (up to 2.5 inches) and damaging winds (gusts up to 75 mph). The saving grace for our area may be the increased CIN with southern extent. This should keep the greatest severe risk focused across southern Nebraska. Still, the southern end of the thunderstorm complex may clip far northern Kansas, bringing the potential for strong winds and perhaps some hail. The severe thunderstorm watch in effect covers these counties. && .DISCUSSION... Issued at 310 AM CDT Thu Jun 29 2023 Key Points: - Very hot through Friday. Heat Advisory continues today across east-central KS where Heat Indices will reach the mid to upper 100s. - Additional chances for strong to severe storms this evening through Friday night. This morning's storms (see mesoscale section) will act to reinforce the frontal boundary and push it a bit farther south. By mid-day, it should stall somewhere around I-70. Along and to its south, another very hot day is expected, with temperatures approaching or surpassing 100. Exact temperatures will be dependent on the amount of high cloud cover, but it will be plenty hot regardless. Coupled with low 70s dewpoints, heat indices will climb into the mid and upper 100s across east central Kansas. A Heat Advisory is continued for this area. North of the boundary towards the Nebraska border will be a bit cooler, only seeing highs in the lower 90s. Given the similar synoptic setup, will again have to watch the High Plains for developing thunderstorms late afternoon and evening. Like what is occurring right now, any storms that develop to our west could eventually result in a severe risk if they grow upscale along the instability axis. By Friday, there is some minor uncertainty on if the boundary will inch a bit farther south or if it will retreat slightly back to the north. But regardless, the overall story will be the same. Very hot along and south of the front, with a risk for strong to severe storms north of the boundary. Will hold off on any additional Heat Advisory until there is better confidence on the boundary position and the impacts of prior convection. By Friday night, the upper trough to our west will push east, finally shoving the boundary fully through our area. Precipitation chances will peak Friday night and Saturday as this occurs, with one or two rounds of thunderstorms likely developing behind the front. The post-frontal airmass will keep the weekend cooler, with highs generally in the upper 80s. Rising heights then lead to a slight warming trend for the start of next week, with just some low end precipitation chances for Independence Day. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 1227 AM CDT Thu Jun 29 2023 Thunderstorms well off to the west should stay towards the Nebraska border overnight, but will reinforce the frontal boundary and push it southward towards the main TAF sites. Winds will shift to the northeast behind this boundary around 5 to 10 kts. The boundary could stall around KTOP/KFOE during the day, resulting in a period of more variable winds until it pushes farther south after sunset. && .TOP WATCHES/WARNINGS/ADVISORIES... Heat Advisory from 1 PM this afternoon to 9 PM CDT this evening for KSZ024-026-038>040-054>056-058-059. && MESOSCALE...Reese DISCUSSION...Reese AVIATION...Reese
Hazardous Weather Outlook National Weather Service Topeka KS 322 AM CDT Thu Jun 29 2023 KSZ008>012-300830- Republic-Washington-Marshall-Nemaha-Brown- 322 AM CDT Thu Jun 29 2023 ...SEVERE THUNDERSTORM WATCH 411 IN EFFECT UNTIL 8 AM CDT THIS MORNING... This Hazardous Weather Outlook is for north central Kansas and northeast Kansas. .DAY ONE...Today and tonight. More detailed information can be accessed at... http://www.weather.gov/media/top/DssPacket.pdf Severe Thunderstorm Watch. Severe thunderstorms may clip far northern Kansas this morning, with large hail and damaging winds. See severe thunderstorm watch for additional information. Additional strong to severe storms will be possible this evening and tonight across north-central and northeast Kansas. Large hail and damaging winds would be possible with any storm that can develop. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A few more strong to severe thunderstorms will also be possible Friday through Friday night. Large hail and damaging winds would again be the main hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report hail of one inch or larger, wind damage and flooding. && More detailed information can be found at: www.weather.gov/media/top/DssPacket.pdf KSZ020>023-034>037-300830- Cloud-Clay-Riley-Pottawatomie-Ottawa-Dickinson-Geary-Morris- 322 AM CDT Thu Jun 29 2023 This Hazardous Weather Outlook is for central Kansas, east central Kansas, north central Kansas and northeast Kansas. .DAY ONE...Today and tonight. Hot conditions will occur this afternoon, as heat indices will peak around 98 to 103 this afternoon. A few strong to severe storms will be possible this evening and tonight, mainly north of Interstate 70. Large hail and damaging winds would be possible with any storm that can develop. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Heat indices around 100 are likely again Friday. A few more strong to severe thunderstorms will also be possible Friday through Friday night. Large hail and damaging winds would again be the main hazards. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. && More detailed information can be found at: www.weather.gov/media/top/DssPacket.pdf KSZ024-026-038>040-054>056-058-059-300830- Jackson-Jefferson-Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin- Coffey-Anderson- 322 AM CDT Thu Jun 29 2023 ...HEAT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM CDT THIS EVENING... This Hazardous Weather Outlook is for east central Kansas and northeast Kansas. .DAY ONE...Today and tonight. More detailed information can be accessed at... http://www.weather.gov/media/top/DssPacket.pdf Heat Advisory. A Heat Advisory is in effect this afternoon across much of the area, where heat indices will peak around 104 to 109 this afternoon. A few strong to severe storms will be possible this evening and tonight, mainly north of Interstate 70. Large hail and damaging winds would be possible with any storm that can develop. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Heat indices around 100 to 105 are likely again Friday. A few more strong to severe thunderstorms will also be possible Friday through Friday night. Large hail and damaging winds would again be the main hazards. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. && More detailed information can be found at: www.weather.gov/media/top/DssPacket.pdf
The Grand Island radar (KUEX), 85 km away, was scanning. The volume nearest the first event began at 10:55 UTC.
20 thunderstorm wind, 3 hail. Local standard time, as filed.
Wind gust of 66 mph measured at local mesonet site.
Large metal outbuilding suffered partial wall and roof damage. Some trees snapped. House suffered minor roof damage.
Large tree with estimated diameter over 12 inches uprooted.
A tree limb at least 10 inches in diameter knocked down.
Significant damage to home and barn, including roof damage.
Numerous large trees snapped, estimated at 10 inches in diameter. House damage also reported from falling trees.
Outbuilding destroyed.
Fifteen power poles snapped on Eagle Road.
Portion of a roof lifted off a large metal outbuilding.
Ping pong ball sized hail reported via mping.
Half dollar sized hail reported.
Quarter sized hail reported via mping.
Tree limb at least six inches in diameter knocked down.
Power lines down in Waterville.
Six inch tree limbs blown down.
Tree limbs 2 to 3 inches in diameter down, stop sign also blown over.
Mesonet station UP103 measured wind gust of 58 mph.
Personal weather station measured wind gust of 77 mph.
Mesonet station reported a wind gust of 77 mph.
Estimated wind gust of 60 mph.
Trees significantly bent, power out at the spotter location.
Personal weather station measured a wind gust of 68 mph.
Wind gusts estimated at 60 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kansas in 2023Every state in 2023This day in weather historyWarnings in Kansas, June 2023
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: 1110589, 1110812, 1110813, 1110814, 1110815, 1110816, 1110817, 1110823, 1110818, 1110590, 1110591, 1110592, 1110819, 1110820, 1110821, 1110822, 1110593, 1110594, 1110595, 1110596, 1110597, 1110599, 1110600.