Alert archive / Kansas / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 252, NWS Topeka, KS
NWS Topeka, KS issued this severe thunderstorm warning at Jun 1, 2026, 12:31 AM CDT for Lyon County, Wabaunsee County, Kansas. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2026, 12:31 AM CDT (05:31 UTC)
- Expired
- Jun 1, 2026, 1:01 AM CDT
- In force
- 30 min
- Issued by
- NWS Topeka, KS
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Lyon County, KS, Wabaunsee County, KS
The radar
The Topeka radar (KTWX), 29 km from the middle of the area, began a volume at 05:29 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 31, 8:53 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 5.5 hours before the alert went out and 63 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3361 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 10.3
The text
As transmitted.
109
WUUS53 KTOP 010531
SVRTOP
KSC111-197-010615-
/O.NEW.KTOP.SV.W.0252.260601T0531Z-260601T0615Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
1231 AM CDT Mon Jun 1 2026
The National Weather Service in Topeka has issued a
* Severe Thunderstorm Warning for...
South central Wabaunsee County in east central Kansas...
Northwestern Lyon County in east central Kansas...
* Until 115 AM CDT.
* At 1229 AM CDT, a severe thunderstorm was located 8 miles northeast
of Council Grove Lake, moving east at 15 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters. A spotter 4 miles southeast of
Alta Vista reported strong winds around 60 mph and half
inch hail.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Allen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
&&
LAT...LON 3866 9635 3874 9635 3874 9636 3887 9636
3890 9613 3863 9612
TIME...MOT...LOC 0529Z 271DEG 15KT 3875 9639
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$2 follow-up statements
698
WWUS53 KTOP 010550
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
1250 AM CDT Mon Jun 1 2026
KSC111-197-010615-
/O.CON.KTOP.SV.W.0252.000000T0000Z-260601T0615Z/
Wabaunsee-Lyon-
1250 AM CDT Mon Jun 1 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR SOUTH CENTRAL WABAUNSEE AND NORTHWESTERN LYON COUNTIES...
At 1250 AM CDT, a severe thunderstorm was located 6 miles north of
Bushong, moving east at 25 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Allen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
&&
LAT...LON 3866 9635 3874 9635 3874 9636 3887 9636
3890 9613 3863 9612
TIME...MOT...LOC 0550Z 273DEG 20KT 3873 9629
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$082
WWUS53 KTOP 010601 RRA
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
101 AM CDT Mon Jun 1 2026
KSC111-197-010611-
/O.CAN.KTOP.SV.W.0252.000000T0000Z-260601T0615Z/
Wabaunsee-Lyon-
101 AM CDT Mon Jun 1 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WABAUNSEE AND
NORTHWESTERN LYON COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However, small hail and
gusty winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
east central Kansas.
&&
LAT...LON 3866 9635 3874 9635 3874 9636 3887 9636
3890 9613 3863 9612
TIME...MOT...LOC 0559Z 271DEG 15KT 3873 9623
$$What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jun 1, 12:23 AM CDT, 8 minutes earlier. Its key messages:
- -A conditional threat for severe storms continues this evening, however, some uncertainty exists in whether storms develop. -Best chances for storms early week will be in central KS. Chances increase eastward later in the week. -Hot and humid to start the week, slightly cooler midweek.
Area forecast discussion, Jun 1, 12:23 AM CDT, 8 minutes before
Area Forecast Discussion National Weather Service Topeka KS 1223 AM CDT Mon Jun 1 2026 .KEY MESSAGES... -A conditional threat for severe storms continues this evening, however, some uncertainty exists in whether storms develop. -Best chances for storms early week will be in central KS. Chances increase eastward later in the week. -Hot and humid to start the week, slightly cooler midweek. && .DISCUSSION... Issued at 148 PM CDT Sun May 31 2026 The main focus in the short-term is on the potential for severe thunderstorms this evening. Looking at the synoptic pattern, southwest flow persists aloft with an H5 trough axis across the Northern Plains. Water vapor isn't showing much in the way of shortwaves within the southwest flow as of midday. At the surface low pressure is over northern Oklahoma and southern Kansas early this afternoon. Instability has been building in the wake of this morning's thunderstorm activity, although cloud cover is hampering temps/dew points and associated instability a bit. The cloud cover could continue to be a factor. However, most models agree on a quick increase in instability into the evening with over 3000 J/kg of MLCAPE in eastern KS by 21/22Z. The 18Z TOP RAOB still shows a cap with 14C at 750mb. RAP forecast soundings show a similar cap, but erode it by around 01/02Z. Some CAMs show storm initiation in our southeastern counties around that same timeframe. Have kept POPs only around 30 percent given uncertainty that remains on a forcing mechanism and whether the cap can be overcome. If storms do develop, there should be enough instability and deep layer shear to support supercells with a damaging wind and hail risk. Backed sfc and low level winds would also aid in a tornado risk with both RAP and HRRR forecast soundings showing over 100 m2/s2 of 0-1km SRH and over 200 m2/s2 of 0-3km SRH. Monday looks hot and humid with highs reaching the upper 80s and low 90s. Most of the day should be dry but chances for storms will begin increasing again Monday night and early Tuesday, mainly in central KS where models show impacts from a shortwave H5 trough. A mid-level ridge will build over the area early in the week and a sfc ridge will move in from the northeast midweek. That set up should keep the main axis of storms in central KS until the upper ridge advances eastward as an upper trough moves across the far northern CONUS. Shortwaves aloft can be tough to predict several days in advance, but in general, POPs will increase eastward late in the week as that ridge pushes east. The 12Z run of long range models continue to show a storm system moving over KS next weekend, which would keep rain chances around. Temperature-wise, a slight cool down is expected through midweek due to the sfc ridge nudging in from the east. && .AVIATION /06Z TAFS THROUGH 06Z TUESDAY/... Issued at 1223 AM CDT Mon Jun 1 2026 Thunderstorms will likely continue in the vicinity of KTOP and KFOE for another hour or two. Once these storms clear out, calm winds and high moisture should help some areas of fog develop. Some uncertainty on exact timing and coverage, but areas towards KMHK may see the densest fog towards sunrise. Any fog should clear out by mid morning, with VFR conditions and light east winds in place the rest of the period. && .TOP WATCHES/WARNINGS/ADVISORIES... None. && DISCUSSION...Teefey AVIATION...Reese
Hazardous weather outlook, May 31, 1:58 PM CDT, 10 hours 33 minutes before
Hazardous Weather Outlook National Weather Service Topeka KS 158 PM CDT Sun May 31 2026 KSZ008>012-020>024-026-034>040-054>056-058-059-011900- Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley- Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris- Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson- 158 PM CDT Sun May 31 2026 This Hazardous Weather Outlook is for central Kansas, east central Kansas, north central Kansas and northeast Kansas. .DAY ONE...This afternoon and tonight. A few thunderstorms may develop in eastern Kansas this evening. Any storm that develops could produce damaging wind, and large hail. A tornado could also occur. .DAYS TWO THROUGH SEVEN...Monday through Saturday. There is a slight chance for a few additional storms Monday evening and night. These storms could produce some gusty winds or small hail, primarily in central Kansas. && More detailed information can be found at: www.weather.gov/media/top/DssPacket.pdf
In the hours before
Local storm report, May 31, 11:05 PM CDT, 1 hour 26 minutes before
Preliminary Local Storm Report
National Weather Service Topeka KS
1105 PM CDT Sun May 31 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1050 PM Hail 3 E Gridley 38.10N 95.84W
05/31/2026 M2.25 Inch Coffey KS Public
Resent. Report from mPING: Hen Egg+ (2.25
in.).
&&Local storm report, May 31, 11:14 PM CDT, 1 hour 17 minutes before
Preliminary Local Storm Report
National Weather Service Topeka KS
1114 PM CDT Sun May 31 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1102 PM Hail 5 WSW Emporia 38.38N 96.26W
05/31/2026 M1.00 Inch Lyon KS Storm Chaser
Spotter network report.
&&
DRLocal storm report, May 31, 11:27 PM CDT, 1 hour 4 minutes before
Preliminary Local Storm Report
National Weather Service Topeka KS
1127 PM CDT Sun May 31 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1052 PM Hail Gridley 38.10N 95.88W
05/31/2026 E2.50 Inch Coffey KS Emergency Mngr
Emergency manager relayed photo of estimated
tennis ball size hail in Gridley. Time
estimated from radar.
&&
DRLocal storm report, May 31, 11:28 PM CDT, 1 hour 3 minutes before
Preliminary Local Storm Report
National Weather Service Topeka KS
1128 PM CDT Sun May 31 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1126 PM Hail 6 W Le Roy 38.10N 95.74W
05/31/2026 E1.75 Inch Coffey KS Public
Report from mPING: Golf Ball (1.75 in.).
&&Local storm report, May 31, 11:53 PM CDT, 38 minutes before
Preliminary Local Storm Report
National Weather Service Topeka KS
1153 PM CDT Sun May 31 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1143 PM Hail 3 N Olpe 38.30N 96.18W
05/31/2026 E1.50 Inch Lyon KS Public
Report from mPING: Ping Pong Ball (1.50
in.).
&&Local storm report, Jun 1, 12:27 AM CDT, 4 minutes before
Preliminary Local Storm Report
National Weather Service Topeka KS
1227 AM CDT Mon Jun 1 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1224 AM Tstm Wnd Gst 4 SE Alta Vista 38.82N 96.45W
06/01/2026 E60 MPH Morris KS Trained Spotter
Also getting hail but cant see what size.
&&The office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 8:33 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 27 min |
| May 31, 8:48 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 27 min |
| May 31, 8:57 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 48 min |
| May 31, 9:10 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 35 min |
| May 31, 9:28 PM CDT | Severe Thunderstorm Warning | TOP | Lyon, Osage | 47 min |
| May 31, 9:42 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 33 min |
| May 31, 10:12 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 11 min |
| May 31, 10:18 PM CDT | Severe Thunderstorm Warning | TOP | Coffey | 27 min |
| May 31, 10:30 PM CDT | Severe Thunderstorm Warning | TOP | Coffey, Lyon | 30 min |
| May 31, 10:39 PM CDT | Flash Flood Warning | TOP | Lyon | 4 hr |
| May 31, 10:39 PM CDT | Severe Thunderstorm Warning | TOP | Coffey | 51 min |
| May 31, 10:42 PM CDT | Tornado Warning | TOP | Coffey | 19 min |
| May 31, 10:47 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 25 min |
| May 31, 10:56 PM CDT | Severe Thunderstorm Warning | TOP | Coffey, Lyon | 49 min |
| May 31, 11:17 PM CDT | Areal Flood Advisory | TOP | Lyon | 62 min |
| May 31, 11:19 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 26 min |
| May 31, 11:19 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 26 min |
| May 31, 11:23 PM CDT | Severe Thunderstorm Warning | TOP | Coffey | 52 min |
| May 31, 11:29 PM CDT | Severe Thunderstorm Warning | TOP | Coffey | 46 min |
| May 31, 11:40 PM CDT | Flash Flood Warning | TOP | Coffey | 3 hr |
| May 31, 11:44 PM CDT | Tornado Warning | TOP | Coffey | 14 min |
| May 31, 11:47 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 43 min |
| Jun 1, 12:04 AM CDT | Tornado Warning | TOP | Anderson, Coffey | 8 min |
| Jun 1, 12:09 AM CDT | Severe Thunderstorm Warning | TOP | Anderson, Coffey | 51 min |
| Jun 1, 12:14 AM CDT | Severe Thunderstorm Warning | TOP | Morris, Wabaunsee | 31 min |
| Jun 1, 12:18 AM CDT | Flash Flood Warning | TOP | Lyon | 2 hr |
| Jun 1, 12:33 AM CDT | Severe Thunderstorm Warning | TOP | Lyon | 27 min |
| Jun 1, 12:37 AM CDT | Severe Thunderstorm Warning | TOP | Anderson | 38 min |
| Jun 1, 12:40 AM CDT | Severe Thunderstorm Warning | TOP | Coffey | 13 min |
| Jun 1, 12:45 AM CDT | Severe Thunderstorm Warning | TOP | Wabaunsee | 30 min |
| Jun 1, 12:51 AM CDT | Severe Thunderstorm Warning | TOP | Jefferson | 39 min |
| Jun 1, 1:09 AM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie, Shawnee, Wabaunsee | 36 min |
| Jun 1, 1:27 AM CDT | Severe Thunderstorm Warning | TOP | Jefferson | 17 min |
| Jun 1, 1:40 AM CDT | Severe Thunderstorm Warning | TOP | Jackson, Shawnee | 35 min |
| Jun 1, 2:21 AM CDT | Areal Flood Warning | TOP | Coffey, Lyon | 9 hr |
Nearby
Severe Thunderstorm Warnings in Kansas, 2026Every severe thunderstorm warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.