Alert archive / Kansas / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 71, NWS Wichita, KS

April 17, 2026Harper County, Kansas

NWS Wichita, KS issued this severe thunderstorm warning at Apr 17, 2026, 2:12 PM CDT for Harper County, Kansas. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 17, 2026, 2:12 PM CDT (19:12 UTC)
Expired
Apr 17, 2026, 3:00 PM CDT
In force
48 min
Issued by
NWS Wichita, KS
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

County Harper County, KS

The radar

The Vance AFB radar (KVNX), 50 km from the middle of the area, began a volume at 19:14 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 17, 1:40 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.2 hours before the alert went out and 227 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, Norman, OK at 12:00Z on 2026-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1174 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, Norman, OK at 12:00Z on 2026-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 310 square meters per square second.1939587897Sfc1 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
1174 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
745 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
310 m²/s²
0-3 km storm-relative helicity
330 m²/s²
Significant tornado parameter
1.2
Supercell composite
10.2

Open this sounding in Storm Lab

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 Apr 17, 12:20 PM CDT, 1 hour 52 minutes earlier. Its key messages:

  • Severe storm threat continues across portions of south central and southeast Kansas through the rest of the afternoon and evening hours. Large hail, damaging winds, locally heavy rainfall, and even a few tornadoes remain possible.
  • Cooler temperatures this weekend, then a warming trend to start next week.
  • Quiet weather through the middle of next week before the return of storm chances.
Area forecast discussion, Apr 17, 12:20 PM CDT, 1 hour 52 minutes before
Area Forecast Discussion
National Weather Service Wichita KS
1220 PM CDT Fri Apr 17 2026

.KEY MESSAGES...

- Severe storm threat continues across portions of south central
  and southeast Kansas through the rest of the afternoon and
  evening hours. Large hail, damaging winds, locally heavy
  rainfall, and even a few tornadoes remain possible.

- Cooler temperatures this weekend, then a warming trend to
  start next week.

- Quiet weather through the middle of next week before the
  return of storm chances.

&&

.DISCUSSION...
Issued at 1215 PM CDT Fri Apr 17 2026

Water vapor imagery and RAP analysis depict strong mid/upper flow
ejecting out of the Southern Rockies into the Plains. A strong cold
front as of 12 PM was located along a line from roughly Kingman to
Newton to Hillsboro. An extremely buoyant airmass lies ahead of this
surface boundary with 3000-4000 J/kg of surface-based CAPE, which
will support rapid storm development along the boundary this
afternoon into the evening hours. This instability paired with 50
kts of deep-layer shear will promote severe storms capable of
producing large to very large hail (greater than 2 inches in
diameter) with the initial activity. However, per the previous
discussion, we expect storm mode to go linear rather quickly as
short term guidance continues to indicate shear oriented mostly
parallel to the cold front. Therefore, as activity becomes linear
through the rest of the afternoon into the evening hours, the
primary threats should transition to strong winds and heavy
rainfall. Should a storm be able to separate from the cold front and
remain discrete into the evening hours, however, a strengthening LLJ
will increase low-level shear/SRH and may allow for a slightly
higher tornado threat, especially across far southeast Kansas.

In addition to the severe threat, the exceptionally moist airmass
ahead of today's front may provide the potential for heavy rain and
localized flooding concerns later tonight, especially if storms
begin to train along the boundary. This threat will likely remain
confined to areas along and southeast of the Kansas Turnpike. We
expect storm chances to largely come to an end after midnight as the
cold front exits southeast Kansas.

Cooler and quieter weather is expected to follow in the wake of
today's system as northwest flow aloft settles in over the
Heartland. Low temperatures Saturday morning are expected to dip
into the low 40s along and southeast of the Kansas Turnpike, while
portions of central Kansas may see temperatures near freezing.
Additionally, breezy north winds in the trailing airmass will
promote wind chills in the 20s and 30s to start the day. Seasonably
cool highs in the low 60s are expected across the majority of the
area. With clear to mostly clear skies forecast to remain in place
throughout the day into the overnight period, radiational cooling
Saturday night should promote widespread lows in the 30s heading
into Sunday morning. Largely southerly winds will allow for
temperatures to rebound into the 70s Sunday afternoon, with perhaps
slightly warmer temperatures possible in central Kansas thanks to
more of a downslope wind component. High temperatures in the 70s and
low 80s are expected Monday through Wednesday.

Looking ahead to the latter half of next week, GFS/ECMWF/Canadian
all highlight a mid/upper trough tracking eastward over the Desert
Southwest into the Rockies and Plains. This feature may allow for
another period of active weather as early as Wednesday, though to
this point Thursday evening appears to have the greatest chances for
showers and storms. Stay tuned as additional details come into
focus.

&&

.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1215 PM CDT Fri Apr 17 2026

A cold front is quickly moving southeast through Kansas early this
afternoon. As of 17z this front was located from KHUT to KMHK and
moving to the southeast at around 10kts. Behind the front, winds are
switching around to the north and becoming gusty and remain gusty
through the night. Ahead of this front, instability is increasing
which will lead to strong to severe thunderstorms generally from
KICT and points southeast. Thunderstorms that develop will produce
very large hail, gusty and erratic winds, frequent lightning, and
heavy rainfall which will reduce the visibility at times. Eventually
a line of storms will develop and move to the southeast eventually
clearing the southeast corner of Kansas by around midnight. Once the
line of storms clears the area conditions will return to VFR with
northerly winds slowly diminishing through the night.

&&

.FIRE WEATHER...
Issued at 1215 PM CDT Fri Apr 17 2026

Breezy north/northwest winds and dry conditions will support very
high grassland fire danger this afternoon for areas west of
Interstate 135. Very high grassland fire danger is forecast for the
same areas during the afternoon hours on Monday, Wednesday, and
Thursday.

&&

.ICT WATCHES/WARNINGS/ADVISORIES...
None.

&&

DISCUSSION...JWK
AVIATION...WI
FIRE WEATHER...JWK
Hazardous weather outlook, Apr 17, 12:24 PM CDT, 1 hour 48 minutes before
Hazardous Weather Outlook
National Weather Service Wichita KS
1224 PM CDT Fri Apr 17 2026

KSZ032-033-047>053-067>072-082-083-091>096-098>100-181730-
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-
1224 PM CDT Fri Apr 17 2026

This hazardous weather outlook is for portions of Central Kansas,
South Central Kansas and Southeast Kansas.

.DAY ONE...This Afternoon and Tonight

Severe storms will be likely this afternoon and evening along a
strong cold front. Storms are expected to first develop between
1 pm and 5 pm generally along a Marion, to Wichita, to Harper line
and track off to the east. Storms will exit southeast Kansas
between 10 pm and 1 am. Large hail and damaging winds will be
possible with the stronger storms. In addition, a couple tornadoes
will be possible, generally before 8 pm.

Very high grassland fire danger is forecast for areas along and
west of I-135 this afternoon due to gusty north winds.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Some frost will be possible Sunday morning for much of south
central and southeast Kansas.

Very high fire danger will return to areas along and west of
Highway 14 for Monday, Wednesday and Thursday. This will be due to
above normal temperatures and gusty south winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and evening
primarily along and southeast of the Kansas Turnpike.

&&

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, Apr 17, 2:03 PM CDT, 9 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 8:03 AM CDTRiver Flood WarningICTLabette, Neosho3 days
Apr 17, 8:03 AM CDTRiver Flood WarningICTNeosho58 hr
Apr 17, 8:03 AM CDTRiver Flood WarningICTCherokee, Labette3 days
Apr 17, 1:53 PM CDTSevere Thunderstorm WarningICTHarvey, Sedgwick52 min
Apr 17, 2:09 PM CDTSevere Thunderstorm WarningICTButler, Marion51 min
Apr 17, 2:18 PM CDTSevere Thunderstorm WarningICTButler, Chase42 min
Apr 17, 2:22 PM CDTSevere Thunderstorm WarningICTSedgwick, Sumner38 min
Apr 17, 2:44 PM CDTSevere Thunderstorm WarningICTHarvey, Sedgwick18 min
Apr 17, 2:46 PM CDTSevere Thunderstorm WarningICTButler, Chautauqua, Cowley, Elk, Greenwood59 min
Apr 17, 2:53 PM CDTSevere Thunderstorm WarningICTSedgwick, Sumner67 min
Apr 17, 2:55 PM CDTSevere Thunderstorm WarningICTButler, Chase, Greenwood, Marion65 min
Apr 17, 3:27 PM CDTSevere Thunderstorm WarningICTHarper63 min
Apr 17, 3:39 PM CDTSevere Thunderstorm WarningICTAllen, Labette, Montgomery, Neosho, Wilson, Woodson66 min
Apr 17, 3:53 PM CDTSevere Thunderstorm WarningICTHarper, Sumner67 min
Apr 17, 3:56 PM CDTSevere Thunderstorm WarningICTButler, Cowley, Sedgwick64 min
Apr 17, 4:32 PM CDTSevere Thunderstorm WarningICTNeosho27 min
Apr 17, 4:57 PM CDTSevere Thunderstorm WarningICTButler, Cowley48 min
Apr 17, 5:04 PM CDTSevere Thunderstorm WarningICTAllen, Elk, Greenwood, Neosho, Wilson, Woodson56 min
Apr 17, 5:24 PM CDTSevere Thunderstorm WarningICTElk, Greenwood33 min
Apr 17, 6:04 PM CDTSevere Thunderstorm WarningICTCowley, Sumner56 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.