Alert archive / Kansas / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 33, NWS Topeka, KS

April 13, 2026Lyon County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Apr 13, 2026, 5:07 PM CDT for Lyon County, Kansas. It was in force for 53 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 13, 2026, 5:07 PM CDT (22:07 UTC)
Expired: Apr 13, 2026, 6:00 PM CDT
In force: 53 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.75 in
Wind: 60.0 mph

County Lyon County, KS

The radar

The Topeka radar (KTWX), 61 km from the middle of the area, began a volume at 22:08 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 nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 10.1 hours before the alert went out and 75 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1257 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 833 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 380 m²/s²
0-3 km storm-relative helicity: 330 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 Topeka, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 13, 2:26 PM CDT, 2 hours 41 minutes earlier.

Area forecast discussion, Apr 13, 2:26 PM CDT, 2 hours 41 minutes before

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Hazardous weather outlook, Apr 13, 2:32 PM CDT, 2 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Topeka KS
232 PM CDT Mon Apr 13 2026

KSZ008>012-020>024-026-034>040-054>056-058-059-141945-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
232 PM CDT Mon Apr 13 2026

This Hazardous Weather Outlook is for portions of central Kansas,
east central Kansas, north central Kansas, and northeast Kansas.

.DAY ONE...This Afternoon and Tonight

Red Flag Warning through 9 PM. A few isolated severe thunderstorms
may occur across the far southeast counties early this evening.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There is a chance for severe thunderstorms Tuesday through
Wednesday night. Then again Friday and Friday night. The primary
threats will be hail and wind.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to relay reports of hail, damaging
wind, tornadoes and flooding.

&&

More detailed information can be found at:
www.weather.gov/media/top/DssPacket.pdf

In the hours before

Special weather statement, Apr 13, 4:53 PM CDT, 14 minutes before

Special Weather Statement
National Weather Service Topeka KS
453 PM CDT Mon Apr 13 2026

KSZ037-054-132230-
Lyon-Morris-
453 PM CDT Mon Apr 13 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN MORRIS AND
NORTHWESTERN LYON COUNTIES THROUGH 530 PM CDT...

At 453 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Strong City, moving northeast at 45 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down small tree limbs and blow
         around unsecured objects. Hail damage to outdoor objects
         and vegetation is possible.

Locations impacted include...
Council Grove, Bushong, Dunlap, and Council Grove Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3852 9660 3874 9652 3874 9615 3852 9640
TIME...MOT...LOC 2153Z 212DEG 38KT 3850 9652

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Jones

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 1:48 AM CDT	Red Flag Warning	TOP	Cloud, Ottawa, Republic	19 hr
Apr 13, 4:53 PM CDT	Special Weather Statement	TOP	Morris	37 min
Apr 13, 5:47 PM CDT	Special Weather Statement	TOP	Wabaunsee	28 min
Apr 13, 5:57 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage	63 min
Apr 13, 6:23 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Morris, Wabaunsee	37 min
Apr 13, 6:38 PM CDT	Tornado Warning	TOP	Osage	37 min
Apr 13, 6:46 PM CDT	Tornado Warning	TOP	Lyon	29 min
Apr 13, 6:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TOP	Douglas, Franklin, Osage	54 min
Apr 13, 6:56 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage, Wabaunsee	35 min
Apr 13, 6:58 PM CDT	Tornado Warning	TOP	Franklin, Osage	32 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2026 Every 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.