Alert archive / Kansas / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 372, NWS Topeka, KS

August 18, 2026Jackson County, Jefferson County, Shawnee County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Aug 18, 2026, 9:55 PM CDT for Jackson County, Jefferson County, Shawnee 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
Aug 18, 2026, 9:55 PM CDT (02:55 UTC)
Expired
Aug 18, 2026, 10:48 PM CDT
In force
53 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Jackson County, KS, Jefferson County, KS, Shawnee County, KS

The radar

The Topeka radar (KTWX), 57 km from the middle of the area, began a volume at 02:58 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

Springfield, MO (KSGF), launched 00:00Z, 2.9 hours before the alert went out and 305 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, Springfield, MO at 00:00Z on 2026-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1335 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, Springfield, MO at 00:00Z on 2026-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
1335 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
2050 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:51 PM CDTSevere Thunderstorm WarningTOPClay, Dickinson, Geary24 min
Aug 18, 9:00 PM CDTSpecial Weather StatementTOPWashington30 min
Aug 18, 9:14 PM CDTSevere Thunderstorm WarningTOPGeary, Riley12 min
Aug 18, 9:28 PM CDTSpecial Weather StatementTOPJackson32 min
Aug 18, 9:37 PM CDTSevere Thunderstorm WarningTOPMarshall, Pottawatomie, Riley, Washington38 min
Aug 18, 9:55 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson, Shawnee53 min
Aug 18, 10:01 PM CDTSevere Thunderstorm WarningTOPPottawatomie44 min
Aug 18, 10:21 PM CDTSevere Thunderstorm WarningTOPShawnee, Wabaunsee24 min
Aug 18, 10:41 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson, Pottawatomie, Shawnee, Wabaunsee64 min
Aug 18, 11:38 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson67 min
Aug 19, 3:02 AM CDTAreal Flood AdvisoryTOPJefferson3 hr
Aug 19, 3:09 PM CDTSpecial Weather StatementTOPMarshall51 min
Aug 19, 3:43 PM CDTSevere Thunderstorm WarningTOPBrown, Marshall, Nemaha47 min
Aug 19, 3:59 PM CDTSpecial Weather StatementTOPBrown46 min
Aug 19, 4:16 PM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Nemaha44 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.