There was one report of damage from a suspected microburst in Republic County during the afternoon on 8/27.
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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.
There was one report of damage from a suspected microburst in Republic County during the afternoon on 8/27.
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 Aug 27, 2:36 PM CST, 1 hour 39 minutes earlier.
Area Forecast Discussion National Weather Service Topeka KS 336 PM CDT Fri Aug 27 2021 .DISCUSSION... Issued at CDT Fri Aug 27 2021 Late this afternoon, an upper trough was located across the central Rockies. A downstream upper level ridge axis extended from the southeast US north-northwest into the southern Great Lakes. At the surface a weak sfc trough axis extended from south central NE southwest into southeast CO. There may be enough convergence along this sfc trough axis to provide ascent for a few isolated thunderstorms. The effective shear will be weak but MLCAPES will be 100-1500 J/KG, so any pulse storm may produce gusty winds. I placed a 20 POP across the northwest counties, in case isolated storms managed to develop. The FV3 CAM does forecast a weak line of storms developing across Republic CO after 20Z. The HRRR develops isolated storms across northwest and west central KS. The main synoptic front has lifted northward across central ND. Tonight, any storm that manages to develop in the northwest counties will dissipate after sunset. Saturday through Sunday night, The upper level trough across the central Rockies will lift east-northeast across the northern and central Plains. Stronger low-level CAA across the northern Plains will cause the surface front to shift southward across SD and into north central NE during the afternoon hours. Several CAMs show a line of storms developing along the front, then shifting southeast across southern NE during the evening hours and into north central KS after Midnight. If these storms can keep their intensity, there might be a few damaging wind gusts within the line of te storms. However, the effective shear will weaken below 20 KTS once this line moves into north central KS and the outflow may outrun the line of storms causing the line to weaken. At this time SPC has a marginal risk out for portions of north central KS in case the line can hold together as it moves southeast across north central KS after Midnight into early Sunday morning . It looks as if the line of storms will continue to weaken and most CAMs show the line of storms falling apart across the central counties of the CWA during the morning hours of Sunday. Highs on Saturday will range from the lower to mid 90s with heat indices around 100 degrees. Thunderstorm chances on Sunday will dependent on where the outflow boundary/front ends up during the afternoon hours. The 3KM NAM shows the front shifting south of the CWA during the afternoon hours. If this were to occur the better chance for thunderstorms will develop across south central and southeast KS. If the front is slower and stalls out across the CWA as forecasted by the ECMWF and GFS, then thunderstorm chances will increase across the CWA. HOwever, the effective shear will be weak, around 10 KTS, so I'm not expecting any of the storms to be severe. The H5 trough will lift northeast across the Great Lakes States. Hurricane Ida will make landfall across the central LA coast late Sunday night. Highs on Sunday will be a bit cooler with mid 80s along the NE border to lower 90s south of I-70 Monday through Thursday, An upper level trough will move into the northwestern US as the Hurricane becomes an extra tropical upper low. An upper level ridge will amplify northward across the southern and central Plains Tuesday into Thursday. Expect a slight warm up with highs back into the lower to mid 90s. The H5 trough across the northwestern US will move east across the northern and central Plains, as it passes north of the CWA, a weak surface && .AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon) Issued at 1215 PM CDT Fri Aug 27 2021 VFR conditions will continue for the next 24 hours. Low level wind shear will increase to 20-25 knots from 0400z Sat to 1400z Sat. && .TOP WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION...Gargan AVIATION...Gargan
Hazardous Weather Outlook National Weather Service Topeka KS 325 PM CDT Fri Aug 27 2021 KSZ008>012-020>024-026-034>040-054>056-058-059-282030- Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley- Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris- Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson- 325 PM CDT Fri Aug 27 2021 This hazardous weather outlook is for east central...north central and northeast Kansas. .DAY ONE...Tonight There will be a slight chance for thunderstorms this afternoon and early evening across portions of north central KS. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Thunderstorms will be possible late Saturday night across north central KS. Some of these storms may be strong to severe. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight. && More detailed information can be accessed at... http://www.weather.gov/top/sitrep
Special Weather Statement
National Weather Service Topeka KS
411 PM CDT Fri Aug 27 2021
KSZ008-009-272215-
Republic-Washington-
411 PM CDT Fri Aug 27 2021
...Strong thunderstorms will impact portions of Republic and
northwestern Washington Counties through 515 PM CDT...
At 411 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Narka to 4 miles south of Formoso.
Movement was northeast at 25 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Belleville, Scandia, Courtland, Norway, Munden, Narka and Mahaska.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4000 9707 3965 9784 3966 9793 3986 9793
4000 9759
TIME...MOT...LOC 2111Z 241DEG 22KT 3992 9744 3971 9800
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
BaergSpecial Weather Statement
National Weather Service Topeka KS
511 PM CDT Fri Aug 27 2021
KSZ008-272245-
Republic-
511 PM CDT Fri Aug 27 2021
...A strong thunderstorm will impact portions of northwestern
Republic County through 545 PM CDT...
At 511 PM CDT, Doppler radar was tracking a strong thunderstorm 5
miles east of Lovewell State Park, moving northeast at 20 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Republic.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4000 9763 3983 9793 4000 9793
TIME...MOT...LOC 2211Z 227DEG 19KT 3991 9794
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
BaergThe Grand Island radar (KUEX), 59 km away, was scanning. The volume nearest the first event began at 22:13 UTC.
1 thunderstorm wind. Local standard time, as filed.
Microburst wind blew the roof off of a large farm equipment shelter. Wind estimated around 75 mph.
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, August 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: 979661.