Alert archive / Kansas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 114, NWS Topeka, KS

June 11, 2018Brown County, Nemaha County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 11, 2018, 8:15 PM CDT for Brown County, Nemaha County, Kansas. It was in force for 60 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
Jun 11, 2018, 8:15 PM CDT (01:15 UTC)
Expired
Jun 11, 2018, 9:15 PM CDT
In force
60 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Brown County, KS, Nemaha County, KS

The radar

The Topeka radar (KTWX), 98 km from the middle of the area, began a volume at 01:15 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
Jun 11, 6:12 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 1.3 hours before the alert went out and 90 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 00:00Z on 2018-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3203 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 00:00Z on 2018-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.1939Sfc1 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
3203 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
1854 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.2
Supercell composite
9.8

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 Jun 11, 6:39 PM CDT, 1 hour 36 minutes earlier.

Area forecast discussion, Jun 11, 6:39 PM CDT, 1 hour 36 minutes before
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Hazardous weather outlook, Jun 11, 4:05 PM CDT, 4 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Topeka KS
405 PM CDT Mon Jun 11 2018

KSZ008>012-020>024-026-034>040-054>056-058-059-122115-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
405 PM CDT Mon Jun 11 2018

This hazardous weather outlook is for east central...north
central and northeast Kansas.

.DAY ONE...Tonight.

Thunderstorms are possible this evening continuing through tonight.
Some of these may be severe and produce large hail and damaging
winds.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Strong to severe thunderstorms are possible Tuesday night,
primarily along and south of Interstate 70. Strong to severe
storms are also possible Wednesday night, primarily north of
Interstate 70.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

More detailed information can be accessed at...
http://www.weather.gov/top/sitrep

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 8:01 PM CDTSevere Thunderstorm WarningTOPMarshall, Nemaha59 min
Jun 11, 8:42 PM CDTTornado WarningTOPBrown, Nemaha48 min
Jun 11, 8:57 PM CDTSevere Thunderstorm WarningTOPMarshall, Nemaha48 min
Jun 11, 9:03 PM CDTTornado WarningTOPNemaha27 min
Jun 11, 9:11 PM CDTSevere Thunderstorm WarningTOPBrown, Nemaha64 min
Jun 11, 9:20 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson, Nemaha, Pottawatomie55 min
Jun 11, 9:26 PM CDTSevere Thunderstorm WarningTOPBrown, Nemaha49 min
Jun 11, 9:32 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley58 min
Jun 11, 9:36 PM CDTSevere Thunderstorm WarningTOPGeary, Riley54 min
Jun 11, 9:43 PM CDTSevere Thunderstorm WarningTOPMarshall, Nemaha, Pottawatomie32 min
Jun 11, 9:45 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley44 min
Jun 11, 10:09 PM CDTAreal Flood AdvisoryTOPBrown, Nemaha3 hr
Jun 11, 10:09 PM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Jefferson, Nemaha, Pottawatomie66 min
Jun 11, 10:13 PM CDTSevere Thunderstorm WarningTOPDickinson, Geary, Morris, Wabaunsee21 min
Jun 11, 10:16 PM CDTSevere Thunderstorm WarningTOPJackson, Nemaha, Pottawatomie59 min
Jun 11, 10:41 PM CDTSevere Thunderstorm WarningTOPDouglas, Jackson, Jefferson, Osage, Pottawatomie, Shawnee and 1 more64 min
Jun 11, 10:55 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Shawnee, Wabaunsee35 min
Jun 11, 11:15 PM CDTSpecial Weather StatementTOPMorris30 min
Jun 11, 11:29 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin, Jefferson, Osage, Shawnee46 min
Jun 11, 11:30 PM CDTSevere Thunderstorm WarningTOPLyon, Pottawatomie, Shawnee, Wabaunsee45 min
Jun 11, 11:40 PM CDTSevere Thunderstorm WarningTOPDouglas, Jackson, Jefferson, Shawnee35 min
Jun 11, 11:43 PM CDTSpecial Weather StatementTOPWabaunsee32 min
Jun 12, 12:05 AM CDTSevere Thunderstorm WarningTOPAnderson, Coffey, Douglas, Franklin, Lyon, Osage and 2 more55 min
Jun 12, 12:47 AM CDTSevere Thunderstorm WarningTOPAnderson, Coffey, Franklin, Lyon, Osage58 min
Jun 12, 12:59 AM CDTSpecial Weather StatementTOPJefferson31 min
Jun 12, 1:46 AM CDTSpecial Weather StatementTOPAnderson14 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2018Every severe thunderstorm warning in 2018

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.