Slate Creek near Wellington is currently at over 12 feet.

Flood Warning
National Weather Service Wichita KS
1000 AM CDT Mon Oct 8 2018

...Forecast flooding changed from Minor to Moderate severity for the
following rivers in Kansas...

  Arkansas River At Oxford affecting Sumner County.


Do not drive into flooded areas or go around barricades. Nearly two
feet of water will carry most vehicles away. Turn around don`t drown.


1000 AM CDT Mon Oct 8 2018

...Forecast flooding increased from Minor to Moderate severity...
The Flood Warning continues for
 The Arkansas River At Oxford.* From Tuesday morning until further notice.
* At  9:45 AM Monday the stage was 13.0 feet.
* Flood stage is 17.0 feet.
* Moderate flooding is forecast.
* Forecast...Rise above flood stage by late Tuesday morning and
  continue to rise to near 21.0 feet by early Thursday morning.
* Impact...At 18.0 feet...Low lying agricultural fields flood north of
  the river gage site.


                  FLD    OBSERVED           FORECAST 7 AM
Location          STG    STG  DAY TIME     Tue    Wed    Thu
  Oxford          17.0  13.0  Mon 10 AM   16.2   20.6   20.9

Slate Creek is currently at 12.40 feet near Wellington. There is standing water in several locations along both sides of Highway 160 between Wellington and Winfield.