A severe thunderstorm developed over Harper County with a swath of elevated showers and storms during the afternoon hours of August 12th. The storm knocked down powerlines in Anthony as wind gusts up to 70 mph impacted the town.
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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 ICT wrote it up.
A severe thunderstorm developed over Harper County with a swath of elevated showers and storms during the afternoon hours of August 12th. The storm knocked down powerlines in Anthony as wind gusts up to 70 mph impacted the town.
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 Wichita, KS wrote its last area forecast discussion before the first event at Aug 12, 2:14 PM CST, 53 minutes earlier.
Area Forecast Discussion National Weather Service Wichita KS 314 PM CDT Sat Aug 12 2023 .SYNOPSIS... Issued at 311 PM CDT Sat Aug 12 2023 Key Messages: * Severe storms will be possible across south-central Kansas tonight and area wide on Sunday. * Multiple rounds of storms could lead to flooding across south- central Kansas tonight into Sunday night. A flood watch is in effect until late Sunday night. * Below normal temperatures are expected Monday and Tuesday before returning to near normal temperatures. * Seasonal temperatures return by midweek along with drier conditions. && .SHORT TERM...(This evening through Tuesday night) Issued at 311 PM CDT Sat Aug 12 2023 Multiple subtle shortwaves will move across the region tonight through Sunday night out ahead of a more significant shortwave that will move across the Northern and Central Plains Sunday night into Monday. Multiple rounds of storms will move across the region tonight through Sunday night. With these, severe storms and flooding will be possible. Severe storms will mainly be focused across south-central Kansas tonight and then across the entire area on Sunday. The main threats will be quarter sized hail and damaging winds up to 70 mph for the storms tonight. Although CAPE values are well above 3000 j/kg, MLCAPE values are around 2000 j/kg, and 0 to 6km shear is expected be 35 to 45kt, model forecast soundings show a column that may be nearly saturated. This would limit some of the hail potential in storms, but hail up to quarter sized may still be possible. Winds were increased to 70 mph from the previous forecast due to the potential for wet microbursts. The biggest concern looks to be the heavy rain potential. RAP runs have shown PWAT values in 2.2" to 2.7" range across south-central Kansas tonight. Mesoanalysis also shows a 700mb and 850mb front situated east to west across southern Kansas. As the shortwave troughs interact with these boundaries, storms would become efficient rain makers. Flooding would be possible where storms may train over the same areas as well. A flood watch has been issued for portions of south-central Kansas. The main upper level trough will send a cold front through our CWA Sunday night into Monday bring highs in the low 80s and lows into the upper 50s Monday and Tuesday. Drier conditions will also be in place behind the front. .LONG TERM...(Wednesday through Friday) Issued at 311 PM CDT Sat Aug 12 2023 Upper flow will shift well north of the region in the extended range as a high amplitude pattern builds in. There is some uncertainty on whether a 594 ridge will build into the region during this period, but a return to seasonal highs in the low to mid 90s appears likely as well as a dry period. If higher heights do build into the region, well above normal temperatures will be possible. For now, only the ECMWF and EPS shows this scenario with the GFS/GEFS and Canadian/GEPS showing a weaker ridge situated over our region. For now, will continue to show near to slightly above normal highs through Friday. && .AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon) Issued at 1145 AM CDT Sat Aug 12 2023 Elevated convection will continue to fester thru mid-afternoon in southeast Kansas in response to persistent mid-level warm advection and subtle upper shortwave traversing the flow aloft. Higher confidence in more numerous to widespread convective complex later this evening through the overnight hours, moving across central and southern Kansas. As such, have estimated timing with tempo group in the terminals. While generally VFR thru the forecast period, we will no doubt experience MVFR/IFR vsbys in heavy rain. KED && .PRELIMINARY POINT TEMPS/POPS... Wichita-KICT 72 89 64 80 / 80 40 60 0 Hutchinson 70 89 62 81 / 80 50 40 0 Newton 71 88 62 80 / 80 40 50 0 ElDorado 71 88 62 79 / 80 50 60 0 Winfield-KWLD 72 92 65 80 / 70 40 60 0 Russell 68 88 60 82 / 70 60 20 0 Great Bend 68 86 60 80 / 80 50 30 0 Salina 70 88 61 83 / 80 60 30 0 McPherson 70 88 61 80 / 80 50 40 0 Coffeyville 73 93 67 81 / 80 40 80 0 Chanute 72 88 65 78 / 80 60 70 0 Iola 71 87 64 78 / 80 70 70 0 Parsons-KPPF 72 91 66 81 / 80 50 80 0 && .ICT WATCHES/WARNINGS/ADVISORIES... Flood Watch from 7 PM CDT this evening through late Sunday night for KSZ067>069-082-083-091>093. Heat Advisory until 8 PM CDT this evening for KSZ093-098-099. && SYNOPSIS...CRW SHORT TERM...CRW LONG TERM...CRW AVIATION...KED
Hazardous Weather Outlook National Weather Service Wichita KS 329 PM CDT Sat Aug 12 2023 KSZ032-033-047>053-067>072-082-083-091>096-098>100-132030- Russell-Lincoln-Barton-Ellsworth-Saline-Rice-McPherson-Marion-Chase- Reno-Harvey-Butler-Greenwood-Woodson-Allen-Kingman-Sedgwick-Harper- Sumner-Cowley-Elk-Wilson-Neosho-Chautauqua-Montgomery-Labette- 329 PM CDT Sat Aug 12 2023 This hazardous weather outlook is for portions of Central Kansas, South Central Kansas and Southeast Kansas. .DAY ONE...This Evening and Tonight Lingering heat indices between 100 and 105 will continue across far southern Kansas this evening. See heat advisory for latest details. Strong to severe storms will also be possible this evening through the overnight hours across most of the area. The strongest storms will be capable of 70 mph winds and large hail up to quarter size. Heavy rainfall will be possible across the area this evening through tonight. Portions of south-central Kansas could see flooding where areas that have seen heavy rain previously could see more rain tonight. See flood watch for more details. .DAYS TWO THROUGH SEVEN...Sunday through Friday Strong to severe storms will be possible Sunday afternoon through Sunday night. The strongest storms will be capable of 70 mph winds, and quarter sized hail. Heavy rainfall may continue to cause flooding across south-central and southeast Kansas. A flood watch is in effect for portions of south-central Kansas until late Sunday night. Heat indices Sunday are forecast to range from 100 to 103 degrees across south central and southeast Kansas, mainly near the Oklahoma border during the afternoon hours. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. && For a graphical version of this information, see our webpage at: https://weather.gov/crh/ghwo?sid=ict
Special Weather Statement
National Weather Service Wichita KS
1053 AM CDT Sat Aug 12 2023
KSZ071-072-095-096-121645-
Wilson KS-Woodson KS-Neosho KS-Allen KS-
1053 AM CDT Sat Aug 12 2023
...A strong thunderstorm will impact portions of northeastern Wilson,
northern Neosho, southern Woodson and southern Allen Counties through
1145 AM CDT...
At 1052 AM CDT, Doppler radar was tracking a strong thunderstorm 8
miles northeast of Buffalo, or 9 miles southeast of Yates Center,
moving east at 25 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Chanute, Humboldt, Yates Center, Erie, Buffalo, Savonburg, Elsmore,
Stark, Batesville, Petrolia, Rose, Chanute Airport, Iola Airport, and
Toronto Lake.
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 3773 9593 3794 9586 3783 9508 3782 9508
3782 9509 3754 9509
TIME...MOT...LOC 1552Z 285DEG 23KT 3780 9560
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
METZGERSpecial Weather Statement
National Weather Service Wichita KS
1148 AM CDT Sat Aug 12 2023
KSZ095-096-121730-
Wilson KS-Neosho KS-
1148 AM CDT Sat Aug 12 2023
...Strong thunderstorms will impact portions of Wilson and southern
Neosho Counties through 1230 PM CDT...
At 1147 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Fredonia to near St. Paul. Movement was east at
10 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Neodesha, Fredonia, Erie, St. Paul, Thayer, Altoona, Galesburg, New
Albany, Lake Parsons, Buxton, and South Mound.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3739 9596 3762 9595 3755 9509 3739 9509
TIME...MOT...LOC 1647Z 273DEG 10KT 3754 9582 3747 9513
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
METZGERPreliminary Local Storm Report
National Weather Service Wichita KS
216 PM CDT Sat Aug 12 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0215 PM Rain 4 NNW Buffalo 37.76N 95.74W
08/12/2023 M2.96 inch Woodson KS Public
Backyard weather station.
&&Special Weather Statement
National Weather Service Wichita KS
337 PM CDT Sat Aug 12 2023
KSZ091-122100-
Harper KS-
337 PM CDT Sat Aug 12 2023
...A strong thunderstorm will impact portions of Harper County
through 400 PM CDT...
At 337 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Hazelton, moving northeast at 40 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Anthony, Harper, Attica, Danville, Waldron, Corwin, and Crystal
Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3700 9835 3724 9835 3735 9824 3734 9785
3700 9812
TIME...MOT...LOC 2037Z 224DEG 34KT 3712 9826
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
DARMOFALThe Vance AFB radar (KVNX), 52 km away, was scanning. The volume nearest the first event began at 21:06 UTC.
2 thunderstorm wind. Local standard time, as filed.
There were powerlines knocked down north of the town of Anthony.
This was a measured wind gust from a Kansas Department of Transportation site.
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, August 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: 1130680, 1130682.