Alert archive / Kansas / Tornado Warnings in 2018

Tornado Warning 28, NWS Topeka, KS

June 11, 2018Brown County, Nemaha County, Kansas

NWS Topeka, KS issued this tornado warning at Jun 11, 2018, 8:42 PM CDT for Brown County, Nemaha County, Kansas. It was in force for 48 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 11, 2018, 8:42 PM CDT (01:42 UTC)
Expired
Jun 11, 2018, 9:30 PM CDT
In force
48 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.25 in

Counties Brown County, KS, Nemaha County, KS

The radar

The Topeka radar (KTWX), 115 km from the middle of the area, began a volume at 01:44 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.

What was reported inside it

TimeReportWhereRemark
Jun 11, 9:00 PM CDTTSTM WND GST 606 Nne Hiawatha, KS
Jun 11, 9:00 PM CDTTSTM WND GST 60Reserve, KSSOME TREE LIMBS WERE ALSO REPORTED DOWN IN RESERVE - DIAMETER UNKNOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 1.7 hours before the alert went out and 102 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

The text

As transmitted.

248 
WFUS53 KTOP 120142
TORTOP
KSC013-131-120230-
/O.NEW.KTOP.TO.W.0028.180612T0142Z-180612T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Topeka KS
842 PM CDT MON JUN 11 2018

The National Weather Service in Topeka has issued a

* Tornado Warning for...
  Northeastern Nemaha County in northeastern Kansas...
  Northern Brown County in northeastern Kansas...

* Until 930 PM CDT

* At 842 PM CDT, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located
  along a line extending from near Verdon to 6 miles south of
  Humboldt, moving southeast at 30 mph.

  HAZARD...Tornado and half dollar size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* Locations impacted include...
  Sabetha, Fairview, Morrill, Bern, Reserve, Hamlin and Woodlawn. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3991 9536 3978 9588 4000 9601 4000 9547
TIME...MOT...LOC 0142Z 310DEG 25KT 4015 9573 4007 9595 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Cohen
2 follow-up statements
775 
WWUS53 KTOP 120200
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
900 PM CDT MON JUN 11 2018

KSC013-131-120230-
/O.CON.KTOP.TO.W.0028.000000T0000Z-180612T0230Z/
Nemaha-Brown-
900 PM CDT MON JUN 11 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
NORTHEASTERN NEMAHA AND NORTHERN BROWN COUNTIES...

At 900 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located along a
line extending from 3 miles north of Reserve to near Bern, moving
southeast at 30 mph.

HAZARD...Tornado and half dollar size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

Locations impacted include...
Sabetha, Fairview, Morrill, Bern, Reserve, Hamlin and Woodlawn. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3991 9536 3978 9588 4000 9601 4000 9547
TIME...MOT...LOC 0200Z 324DEG 27KT 4003 9554 3993 9595 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Cohen
022 
WWUS53 KTOP 120213
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
913 PM CDT MON JUN 11 2018

KSC013-131-120230-
/O.CON.KTOP.TO.W.0028.000000T0000Z-180612T0230Z/
Nemaha-Brown-
913 PM CDT MON JUN 11 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
NORTHEASTERN NEMAHA AND NORTHERN BROWN COUNTIES...

At 913 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located along a
line extending from 6 miles east of Reserve to 4 miles southwest of
Sabetha, moving southeast at 35 mph.

HAZARD...Tornado and half dollar size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

Locations impacted include...
Sabetha, Fairview, Morrill, Bern, Reserve, Hamlin and Woodlawn. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3991 9536 3978 9588 4000 9601 4000 9547
TIME...MOT...LOC 0213Z 311DEG 30KT 3996 9544 3986 9585 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Cohen

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, 8:15 PM CDTSevere Thunderstorm WarningTOPBrown, Nemaha60 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

Tornado Warnings in Kansas, 2018Every tornado warning in 2018Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.