Alert archive / Kansas / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 392, NWS Topeka, KS

September 15, 2026Lyon County, Wabaunsee County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Sep 15, 2026, 4:31 PM CDT for Lyon County, Wabaunsee County, Kansas. It was in force for 29 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
Sep 15, 2026, 4:31 PM CDT (21:31 UTC)
Expired
Sep 15, 2026, 5:00 PM CDT
In force
29 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Lyon County, KS, Wabaunsee County, KS

The radar

The Topeka radar (KTWX), 33 km from the middle of the area, began a volume at 21:31 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, 9.5 hours before the alert went out and 57 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, Topeka, KS at 12:00Z on 2026-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 192 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, Topeka, KS at 12:00Z on 2026-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 367 square meters per square second.193958Sfc1 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
192 J/kg
Mixed-layer CIN
-330 J/kg
Mixed-layer LCL
1769 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
367 m²/s²
0-3 km storm-relative helicity
360 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 14, 7:15 PM CDTSpecial Weather StatementTOPRepublic45 min
Sep 15, 3:42 PM CDTSpecial Weather StatementTOPLyon33 min
Sep 15, 4:11 PM CDTSpecial Weather StatementTOPLyon34 min
Sep 15, 4:19 PM CDTSpecial Weather StatementTOPLyon41 min
Sep 15, 4:44 PM CDTSpecial Weather StatementTOPWabaunsee31 min
Sep 15, 4:53 PM CDTSpecial Weather StatementTOPOsage37 min
Sep 15, 4:59 PM CDTSevere Thunderstorm WarningTOPShawnee, Wabaunsee20 min
Sep 15, 5:07 PM CDTSevere Thunderstorm WarningTOPOsage38 min
Sep 15, 5:34 PM CDTSpecial Weather StatementTOPDouglas26 min
Sep 15, 5:43 PM CDTSevere Thunderstorm WarningTOPAnderson, Franklin32 min
Sep 15, 6:00 PM CDTSpecial Weather StatementTOPShawnee30 min
Sep 15, 6:08 PM CDTSpecial Weather StatementTOPFranklin37 min
Sep 15, 6:23 PM CDTAreal Flood AdvisoryTOPAnderson, Franklin5 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.