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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via, as described in the StoryMap here.

Hydrograph River at a Glance Download
Little Blue River (MO) at Knobtown Stage (ft)Flow (kcfs)Observed: 7.52 ft at 6:10AM Sep 20, 2023Observed: 7.42 ft at 10:05AM Sep 20, 2023Observed: 7.42 ft at 10:10AM Sep 20, 2023Observed: 7.52 ft at 11:05AM Sep 20, 2023Observed: 7.49 ft at 2:10PM Sep 20, 2023Observed: 7.49 ft at 6:10PM Sep 20, 2023Observed: 7.58 ft at 10:10PM Sep 20, 2023Observed: 7.53 ft at 2:10AM Sep 21, 2023Observed: 7.51 ft at 6:10AM Sep 21, 2023Observed: 7.44 ft at 10:10AM Sep 21, 2023Observed: 7.61 ft at 10:30AM Sep 21, 2023Observed: 7.49 ft at 10:35AM Sep 21, 2023Observed: 7.49 ft at 2:10PM Sep 21, 2023Observed: 7.54 ft at 6:10PM Sep 21, 2023Observed: 7.64 ft at 9:35PM Sep 21, 2023Observed: 7.74 ft at 9:45PM Sep 21, 2023Observed: 7.84 ft at 9:55PM Sep 21, 2023Highest Observation: 7.86 ft at 10:10PM Sep 21, 2023Observed: 7.76 ft at 11:10PM Sep 21, 2023Highest Observation: 7.86 ft at 12:45AM Sep 22, 2023KBNM7(plotting HGIRR) Graph Created (1:03AM Sep 22, 2023)ObservedLatest observed value: 7.86 ft at 12:45 AM CDT 22-Sep-2023. Flood Stage is 27 ft
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts for the Little Blue River (MO) at Knobtown are issued as needed during times of high water, but are not routinely available.
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Downstream Gauge Downstream Gauge - at Lees Summit Road - Independence
Flood Categories (in feet)
Major Flood Stage: 34
Moderate Flood Stage: 29
Flood Stage: 27
Action Stage: 21
Low Stage (in feet): -9999

Historic Crests
(1) 36.50 ft on 10/02/1986
(2) 30.70 ft on 05/19/2004

(P): Preliminary values subject to further review.

Recent Crests
(1) 30.70 ft on 05/19/2004
(2) 36.50 ft on 10/02/1986

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

Zoom Level:14
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
34 Businesses along 350 Highway at Knobtown begin to flood.
31.7 The eastbound lane of 350 Highway at Knobtown is overtopped.
30 Baseball fields at the Little Blue Trace Recreation Area flood.
28 Buildings along Little Blue Road in the Little Blue Community are threatened by flooding.
27 Low-lying areas adjacent to the river flood.
About This Location Collapse

Latitude: 38.964167° N, Longitude: 94.426667° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 27 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 766.71 ft 793.71 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Kansas City/Pleasant Hill Weather Forecast Office
1803 N. 7 Hwy
Pleasant Hill, MO 64080
(816) 540-6021
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