Alert archive / Kansas / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 321, NWS Wichita, KS

June 21, 2026Harper County, Kingman County, Sumner County, Kansas

NWS Wichita, KS issued this severe thunderstorm warning at Jun 21, 2026, 1:42 AM CDT for Harper County, Kingman County, Sumner County, Kansas. It was in force for 49 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 21, 2026, 1:42 AM CDT (06:42 UTC)
Expired
Jun 21, 2026, 2:31 AM CDT
In force
49 min
Issued by
NWS Wichita, KS
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Harper County, KS, Kingman County, KS, Sumner County, KS

The radar

The Vance AFB radar (KVNX), 57 km from the middle of the area, began a volume at 06:43 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.

IssuedProductOfficeLasted
Jun 20, 9:59 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 6.7 hours before the alert went out and 165 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.

Skew-T log-pSkew-T log-p diagram, Dodge City, at 00:00Z on 2026-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1502 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 00:00Z on 2026-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1502 J/kg
Mixed-layer CIN
-177 J/kg
Mixed-layer LCL
1559 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
335 m²/s²
Significant tornado parameter
0.2
Supercell composite
5.5

Open this sounding in Storm Lab

The text

As transmitted.

861 
WUUS53 KICT 210642
SVRICT
KSC077-095-191-210745-
/O.NEW.KICT.SV.W.0321.260621T0642Z-260621T0745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wichita KS
142 AM CDT Sun Jun 21 2026

The National Weather Service in Wichita has issued a

* Severe Thunderstorm Warning for...
  Harper County in south central Kansas...
  Southern Kingman County in south central Kansas...
  Southwestern Sumner County in south central Kansas...

* Until 245 AM CDT.

* At 142 AM CDT, a severe thunderstorm was located near Attica,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Anthony, Harper, Attica, Argonia, Zenda, Milan, Spivey, Bluff City,
  Danville, Freeport, Runnymede, and Crystal Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail, damaging wind, and continuous cloud to ground lightning
are occurring with this storm. Move indoors immediately. Lightning is
one of nature's leading killers. Remember, if you can hear thunder,
you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3713 9835 3738 9835 3738 9836 3739 9836
      3747 9832 3736 9759 3700 9775 3700 9793
TIME...MOT...LOC 0642Z 288DEG 33KT 3731 9824 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

WI
2 follow-up statements
794 
WWUS53 KICT 210705
SVSICT

Severe Weather Statement
National Weather Service Wichita KS
205 AM CDT Sun Jun 21 2026

KSC077-095-191-210745-
/O.CON.KICT.SV.W.0321.000000T0000Z-260621T0745Z/
Harper KS-Kingman KS-Sumner KS-
205 AM CDT Sun Jun 21 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT
FOR HARPER...SOUTHEASTERN KINGMAN AND SOUTHWESTERN SUMNER COUNTIES...

At 204 AM CDT, a severe thunderstorm was located near Harper, moving
east at 40 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Anthony, Harper, Argonia, Milan, Bluff City, Danville, Freeport,
Runnymede, and Crystal Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3718 9820 3736 9822 3744 9814 3736 9759
      3700 9775 3700 9793 3707 9817
TIME...MOT...LOC 0704Z 288DEG 33KT 3725 9799 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

WI
344 
WWUS53 KICT 210731
SVSICT

Severe Weather Statement
National Weather Service Wichita KS
231 AM CDT Sun Jun 21 2026

KSC077-095-191-210741-
/O.CAN.KICT.SV.W.0321.000000T0000Z-260621T0745Z/
Harper KS-Kingman KS-Sumner KS-
231 AM CDT Sun Jun 21 2026

...THE SEVERE THUNDERSTORM WARNING FOR HARPER...SOUTHEASTERN KINGMAN
AND SOUTHWESTERN SUMNER COUNTIES IS CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central Kansas.

&&

LAT...LON 3718 9820 3736 9822 3744 9814 3736 9759
      3700 9775 3700 9793 3707 9817
TIME...MOT...LOC 0727Z 288DEG 33KT 3717 9769 

$$

WI

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 Wichita, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 12:30 AM CDT, 1 hour 12 minutes earlier. Its key messages:

  • Numerous storms expected this evening through Sunday morning with severe storms and flooding likely.
  • Additional round of storms likely late Sunday afternoon into Sunday night mainly in southeast and southern KS with severe storms and flooding possible.
  • Below normal high temperatures are forecast for much of next week with highs in the 80s and periodic rain chances possible.
Area forecast discussion, Jun 21, 12:30 AM CDT, 1 hour 12 minutes before
Area Forecast Discussion
National Weather Service Wichita KS
1230 AM CDT Sun Jun 21 2026

.KEY MESSAGES...

- Numerous storms expected this evening through Sunday morning
  with severe storms and flooding likely.

- Additional round of storms likely late Sunday afternoon into Sunday
  night mainly in southeast and southern KS with severe storms
  and flooding possible.

- Below normal high temperatures are forecast for much of next
  week with highs in the 80s and periodic rain chances possible.

&&

.DISCUSSION...
Issued at 224 PM CDT Sat Jun 20 2026

An upper shortwave trough is tracking east across the Central Great
Basin towards the Central Rockies with lee troughing strengthening
over much of the Rockies. A surface low is in eastern Colorado with
a warm front extending across northern Kansas. There are ongoing
showers and storms in central Nebraska due to 850-700mb warm moist
advection. This activity is moving southeast making it possible to
clip our central counties late this afternoon. Another round of
storms is expected to develop this afternoon in eastern Colorado and
eastern Wyoming from upslope flow and convergence, resulting in
another round of storms impacting our area. These storms are
anticipated to move into western Nebraska and western Kansas and
grow upscale as the upper shortwave continues to move into the
Central Rockies. This round of storms would likely impact
central KS after about 9 PM. There is still uncertainty with how
far south and east this MCS tracks with some guidance
suggesting another MCS diving southeast out of Nebraska through
much of our area in the late overnight hours into Sunday
morning. The main threats continue to be damaging winds with
gusts up to 60-80 mph and potentially flooding concerns. Heavy
rainfall is likely given the moist airmass with PWATs
approaching maximum values for this time of year, increasing the
potential for high rainfall rates; however, if this system
remains progressive, it could reduce some widespread flooding. A
brief tornado and hail threat cannot be ruled out especially
this evening if storms develop out ahead of the MCS but the main
concern is damaging winds. By Sunday morning, activity is
expected to have shifted to eastern KS with storms progged to
continue moving east into Missouri by mid morning, though
chances may linger in southeast KS from low-level WAA.

A lull in storms is forecast for late Sunday morning through the
early afternoon before another round of storms is possible late
Sunday afternoon. There is some question as to where the outflow
boundary from overnight/Sunday morning convection will end up. Model
guidance suggests a boundary across southeast KS with convergence
along it, resulting in additional storm development mainly in
southeast and parts of southern KS. Assuming this is where the
boundary sets up, plenty of instability and wind shear are
anticipated making any storm that develops having the potential to
be severe with the primary hazards being damaging winds and large
hail. Storm chances will start to diminish Sunday night as storms
move south and east of the area. Additionally, its possible for some
of our southern most counties to approach Heat Advisory criteria if
this is where the boundary sets up, though given uncertainty at this
time decided not to issue one, though later forecast shifts can
reevaluate.

Continuing into next week, most of Monday looks to remain dry as the
front will be south of our area. Periodic rain chances look possible
for much of the week as the upper air pattern remains relatively
active as multiple shortwave troughs are progged to move across
the region. A shortwave trough is expected to move into the
Northern Plains late Monday night into Tuesday morning. Its
possible for rain chances to clip parts of our area but better
chances remain out of our area. Flow aloft transitions to
westerly/northwesterly over the Plains as ridging builds into
the western CONUS with embedded shortwaves anticipated to ride
the ridging. This will keep periodic shower and storm chances
possible through much of the week with higher chances likely in
the evenings into the overnight hours. For temperatures, highs
are forecast to be in the low to mid 80s through much of the
work week which is about 5-10 degrees below normal for this time
of year.

&&

.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 1226 AM CDT Sun Jun 21 2026

A line of thunderstorms is currently traversing the forecast
area bringing heavy rain and strong winds to the area. HUT and
ICT will see these impacts to start the TAF period. Additional
thunderstorms are expected overnight with the main impacts being
reduced vis, low cigs, and occasionally breezy winds.

Storms will shift out of the area and cigs will lift to VFR
levels generally after 12-15Z. Additional storms are possible
for south-central and southeastern Kansas towards the end of the
forecast time frame, but confidence remains low on exact
location as it will depend on where boundaries linger following
overnight storm activity.

&&

.ICT WATCHES/WARNINGS/ADVISORIES...
Flood Watch through this afternoon for KSZ033-048-049-051>053.
Flood Watch through this evening for KSZ070>072.

&&

DISCUSSION...GC
AVIATION...ADK/AMD
Hazardous weather outlook, Jun 20, 2:27 PM CDT, 11 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Wichita KS
227 PM CDT Sat Jun 20 2026

KSZ032-033-047>053-067>072-082-083-091>096-098>100-211930-
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-
227 PM CDT Sat Jun 20 2026

This hazardous weather outlook is for portions of central Kansas,
east central Kansas, south central Kansas and southeast Kansas.

.DAY ONE...Tonight

A complex of storms is expected to track out of northwest Kansas
and southern Nebraska tonight into early Sunday morning, affecting
much of the area. 60 to 80 mph winds, ping pong ball size hail,
heavy rain and some flooding concerns will be possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Storms will linger Sunday morning across eastern Kansas with
damaging winds and flooding possible. Additional storms are
expected to develop Sunday afternoon and evening, especially across
southern Kansas. Large hail, damaging downburst winds and flooding
will be possible with the stronger storms.

Periodic storm chances will remain for Tuesday through Friday with
strong and severe storms possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated this afternoon or tonight.

&&

For a graphical version of this information, see our webpage at:
https://www.weather.gov/erh/ghwo?wfo=ict

In the hours before

Local storm report, Jun 21, 12:38 AM CDT, 1 hour 4 minutes before
Preliminary Local Storm Report
National Weather Service Wichita KS
1238 AM CDT Sun Jun 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1232 AM     Flood            Russell                 38.89N 98.86W
06/21/2026                   Russell            KS   Emergency Mngr

            Street flooding with some cars stalled. A
            few residence basements flooding.

&&
Local storm report, Jun 21, 12:52 AM CDT, 50 minutes before
Preliminary Local Storm Report
National Weather Service Wichita KS
1252 AM CDT Sun Jun 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1246 AM     Tstm Wnd Gst     2 NNW Andale            37.82N 97.64W
06/21/2026  M65 MPH          Sedgwick           KS   Mesonet

&&
Local storm report, Jun 21, 12:56 AM CDT, 46 minutes before
Preliminary Local Storm Report
National Weather Service Wichita KS
1256 AM CDT Sun Jun 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1236 AM     Tstm Wnd Gst     2 N Mt Vernon           37.74N 97.85W
06/21/2026  E60 MPH          Reno               KS   Public

            Est. 50 to 60 mph winds. Report from social
            media. Time estimated from radar.

&&
Local storm report, Jun 21, 1:15 AM CDT, 27 minutes before
Preliminary Local Storm Report
National Weather Service Wichita KS
115 AM CDT Sun Jun 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1258 AM     Tstm Wnd Gst     Maize                   37.78N 97.47W
06/21/2026  E70 MPH          Sedgwick           KS   Trained Spotter

            Est gusts 65 to 70 mph.

&&
Local storm report, Jun 21, 1:16 AM CDT, 26 minutes before
Preliminary Local Storm Report
National Weather Service Wichita KS
116 AM CDT Sun Jun 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0113 AM     Tstm Wnd Gst     1 NW East Wichita       37.70N 97.27W
06/21/2026  E70 MPH          Sedgwick           KS   Trained Spotter

            70 mph winds along with a few tree branches
            down.

&&
Local storm report, Jun 21, 1:31 AM CDT, 11 minutes before
Preliminary Local Storm Report
National Weather Service Wichita KS
131 AM CDT Sun Jun 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0114 AM     Tstm Wnd Gst     1 NNW Moundridge        38.22N 97.52W
06/21/2026  M68 MPH          McPherson          KS   Mesonet

&&

The office that day

Everything else NWS Wichita, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 10:35 PM CDTSevere Thunderstorm WarningICTBarton, Ellsworth, Lincoln, Russell70 min
Jun 20, 11:23 PM CDTAreal Flood WarningICTRussell9 hr
Jun 20, 11:32 PM CDTSevere Thunderstorm WarningICTBarton, Kingman, McPherson, Reno, Rice73 min
Jun 20, 11:42 PM CDTSevere Thunderstorm WarningICTBarton, Ellsworth, Lincoln, Russell78 min
Jun 21, 12:32 AM CDTSevere Thunderstorm Warning Considerable damage threatICTHarper, Harvey, Kingman, Reno, Sedgwick, Sumner73 min
Jun 21, 12:38 AM CDTSevere Thunderstorm WarningICTEllsworth, Lincoln, McPherson, Marion, Rice, Russell and 1 more82 min
Jun 21, 12:40 AM CDTSevere Thunderstorm Warning Destructive damage threatICTHarvey, Reno, Sedgwick35 min
Jun 21, 1:09 AM CDTAreal Flood WarningICTButler, Sedgwick, Sumner9 hr
Jun 21, 1:16 AM CDTSevere Thunderstorm Warning Considerable damage threatICTButler, Chase, Elk, Greenwood, Sedgwick59 min
Jun 21, 2:01 AM CDTRiver Flood WarningICTLincoln19 hr
Jun 21, 2:01 AM CDTRiver Flood WarningICTLincoln9 hr
Jun 21, 3:02 AM CDTAreal Flood WarningICTBarton, Ellsworth, Rice, Russell4 hr
Jun 21, 3:16 AM CDTRiver Flood WarningICTKingman64 hr
Jun 21, 3:16 AM CDTRiver Flood WarningICTSedgwick, Sumner55 hr
Jun 21, 3:16 AM CDTRiver Flood WarningICTSumner65 hr
Jun 21, 3:16 AM CDTRiver Flood WarningICTCowley4 days
Jun 21, 3:50 AM CDTSevere Thunderstorm WarningICTChautauqua, Cowley40 min
Jun 21, 4:27 AM CDTSevere Thunderstorm WarningICTChautauqua, Elk, Montgomery, Wilson31 min
Jun 21, 4:36 AM CDTSevere Thunderstorm WarningICTButler, Cowley, Sedgwick, Sumner39 min
Jun 21, 5:12 AM CDTSevere Thunderstorm WarningICTChautauqua, Cowley63 min
Jun 21, 5:17 AM CDTAreal Flood WarningICTButler, Cowley, Kingman, Reno, Rice, Sedgwick and 1 more5 hr
Jun 21, 7:53 AM CDTRiver Flood WarningICTCowley, Sumner48 hr
Jun 21, 8:35 AM CDTRiver Flood WarningICTSumner50 hr
Jun 21, 8:45 AM CDTRiver Flood WarningICTCowley24 hr
Jun 21, 8:45 AM CDTRiver Flood WarningICTButler, Cowley40 hr
Jun 21, 8:46 AM CDTAreal Flood WarningICTRussell12 hr
Jun 21, 8:51 AM CDTRiver Flood WarningICTSumner59 hr
Jun 21, 9:17 AM CDTRiver Flood WarningICTLabette, Neosho3 days
Jun 21, 9:17 AM CDTRiver Flood WarningICTNeosho24 hr
Jun 21, 9:17 AM CDTRiver Flood WarningICTCherokee, Labette50 hr
Jun 21, 9:17 AM CDTRiver Flood WarningICTAllen, Neosho40 hr
Jun 21, 9:21 AM CDTRiver Flood WarningICTWilson28 hr
Jun 21, 9:21 AM CDTRiver Flood WarningICTMontgomery, Wilson23 hr
Jun 21, 9:25 AM CDTRiver Flood WarningICTWilson42 hr
Jun 21, 9:59 AM CDTAreal Flood WarningICTButler, Cowley, Harper, Kingman, Reno, Sedgwick and 1 more11 hr
Jun 21, 4:53 PM CDTSevere Thunderstorm WarningICTChautauqua, Elk, Montgomery, Wilson41 min
Jun 21, 5:01 PM CDTTornado WarningICTChautauqua, Montgomery23 min
Jun 21, 5:44 PM CDTSevere Thunderstorm WarningICTMontgomery61 min
Jun 21, 6:08 PM CDTAreal Flood WarningICTMontgomery4 hr
Jun 21, 6:14 PM CDTSevere Thunderstorm WarningICTLabette, Montgomery61 min

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.