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Hydrograph River at a Glance Download
Chehalis River near Grand Mound Stage (ft)Flow (kcfs)Highest Observation: 3.99 ft at 5:30AM Sep 29, 2014Highest Observation: 3.99 ft at 5:45AM Sep 29, 2014Highest Observation: 3.99 ft at 6:00AM Sep 29, 2014Highest Observation: 3.99 ft at 6:15AM Sep 29, 2014Highest Observation: 3.99 ft at 6:30AM Sep 29, 2014Observed: 3.98 ft at 6:45AM Sep 29, 2014Observed: 3.98 ft at 7:00AM Sep 29, 2014Observed: 3.98 ft at 7:15AM Sep 29, 2014Observed: 3.97 ft at 7:30AM Sep 29, 2014Observed: 3.97 ft at 7:45AM Sep 29, 2014Observed: 3.97 ft at 8:00AM Sep 29, 2014Observed: 3.97 ft at 8:15AM Sep 29, 2014Observed: 3.97 ft at 8:30AM Sep 29, 2014Observed: 3.97 ft at 8:45AM Sep 29, 2014Observed: 3.96 ft at 9:00AM Sep 29, 2014Observed: 3.96 ft at 9:15AM Sep 29, 2014Observed: 3.96 ft at 9:30AM Sep 29, 2014Observed: 3.95 ft at 9:45AM Sep 29, 2014Observed: 3.95 ft at 10:00AM Sep 29, 2014Observed: 3.95 ft at 10:15AM Sep 29, 2014Observed: 3.95 ft at 10:30AM Sep 29, 2014Observed: 3.95 ft at 10:45AM Sep 29, 2014Observed: 3.95 ft at 11:00AM Sep 29, 2014Observed: 3.94 ft at 11:15AM Sep 29, 2014Observed: 3.94 ft at 11:30AM Sep 29, 2014Observed: 3.94 ft at 11:45AM Sep 29, 2014Observed: 3.94 ft at 12:00PM Sep 29, 2014Observed: 3.93 ft at 12:15PM Sep 29, 2014Observed: 3.93 ft at 12:30PM Sep 29, 2014Observed: 3.93 ft at 12:45PM Sep 29, 2014Observed: 3.93 ft at 1:00PM Sep 29, 2014Observed: 3.93 ft at 1:15PM Sep 29, 2014Observed: 3.93 ft at 1:30PM Sep 29, 2014Observed: 3.92 ft at 1:45PM Sep 29, 2014Observed: 3.92 ft at 2:00PM Sep 29, 2014Observed: 3.92 ft at 2:15PM Sep 29, 2014Observed: 3.92 ft at 2:30PM Sep 29, 2014Observed: 3.92 ft at 2:45PM Sep 29, 2014Observed: 3.91 ft at 3:00PM Sep 29, 2014Observed: 3.91 ft at 3:15PM Sep 29, 2014Observed: 3.91 ft at 3:30PM Sep 29, 2014Observed: 3.91 ft at 3:45PM Sep 29, 2014Observed: 3.91 ft at 4:00PM Sep 29, 2014Observed: 3.91 ft at 4:15PM Sep 29, 2014Observed: 3.91 ft at 4:30PM Sep 29, 2014Observed: 3.91 ft at 4:45PM Sep 29, 2014Observed: 3.9 ft at 5:00PM Sep 29, 2014Observed: 3.9 ft at 5:15PM Sep 29, 2014Observed: 3.9 ft at 5:30PM Sep 29, 2014Observed: 3.9 ft at 5:45PM Sep 29, 2014Observed: 3.89 ft at 6:00PM Sep 29, 2014Observed: 3.89 ft at 6:15PM Sep 29, 2014Observed: 3.89 ft at 6:30PM Sep 29, 2014Observed: 3.89 ft at 6:45PM Sep 29, 2014Observed: 3.89 ft at 7:00PM Sep 29, 2014Observed: 3.89 ft at 7:15PM Sep 29, 2014Observed: 3.89 ft at 7:30PM Sep 29, 2014Observed: 3.89 ft at 7:45PM Sep 29, 2014Observed: 3.89 ft at 8:00PM Sep 29, 2014Observed: 3.89 ft at 8:15PM Sep 29, 2014Observed: 3.89 ft at 8:30PM Sep 29, 2014Observed: 3.89 ft at 8:45PM Sep 29, 2014Observed: 3.88 ft at 9:00PM Sep 29, 2014Observed: 3.88 ft at 9:15PM Sep 29, 2014Observed: 3.88 ft at 9:30PM Sep 29, 2014Observed: 3.88 ft at 9:45PM Sep 29, 2014Observed: 3.88 ft at 10:00PM Sep 29, 2014Observed: 3.87 ft at 10:15PM Sep 29, 2014Observed: 3.87 ft at 10:30PM Sep 29, 2014Observed: 3.87 ft at 10:45PM Sep 29, 2014Observed: 3.87 ft at 11:00PM Sep 29, 2014Observed: 3.87 ft at 11:15PM Sep 29, 2014Observed: 3.87 ft at 11:30PM Sep 29, 2014Observed: 3.87 ft at 11:45PM Sep 29, 2014Observed: 3.87 ft at 12:00AM Sep 30, 2014Observed: 3.87 ft at 12:15AM Sep 30, 2014Observed: 3.87 ft at 12:30AM Sep 30, 2014Observed: 3.87 ft at 12:45AM Sep 30, 2014Observed: 3.86 ft at 1:00AM Sep 30, 2014Observed: 3.86 ft at 1:15AM Sep 30, 2014Observed: 3.86 ft at 1:30AM Sep 30, 2014Observed: 3.86 ft at 1:45AM Sep 30, 2014Observed: 3.86 ft at 2:00AM Sep 30, 2014Observed: 3.86 ft at 2:15AM Sep 30, 2014Observed: 3.85 ft at 2:30AM Sep 30, 2014Observed: 3.85 ft at 2:45AM Sep 30, 2014Observed: 3.85 ft at 3:00AM Sep 30, 2014Observed: 3.85 ft at 3:15AM Sep 30, 2014Observed: 3.85 ft at 3:30AM Sep 30, 2014Observed: 3.85 ft at 3:45AM Sep 30, 2014Observed: 3.85 ft at 4:00AM Sep 30, 2014Observed: 3.85 ft at 4:15AM Sep 30, 2014Observed: 3.85 ft at 4:30AM Sep 30, 2014Observed: 3.85 ft at 4:45AM Sep 30, 2014Observed: 3.85 ft at 5:00AM Sep 30, 2014Observed: 3.84 ft at 5:15AM Sep 30, 2014Observed: 3.84 ft at 5:30AM Sep 30, 2014Observed: 3.84 ft at 5:45AM Sep 30, 2014Observed: 3.84 ft at 6:00AM Sep 30, 2014Observed: 3.84 ft at 6:15AM Sep 30, 2014Observed: 3.84 ft at 6:30AM Sep 30, 2014Observed: 3.84 ft at 6:45AM Sep 30, 2014Observed: 3.83 ft at 7:00AM Sep 30, 2014Observed: 3.83 ft at 7:15AM Sep 30, 2014Observed: 3.83 ft at 7:30AM Sep 30, 2014Observed: 3.83 ft at 7:45AM Sep 30, 2014Observed: 3.83 ft at 8:00AM Sep 30, 2014Observed: 3.83 ft at 8:15AM Sep 30, 2014Observed: 3.83 ft at 8:30AM Sep 30, 2014Observed: 3.83 ft at 8:45AM Sep 30, 2014Observed: 3.83 ft at 9:00AM Sep 30, 2014Observed: 3.83 ft at 9:15AM Sep 30, 2014Observed: 3.83 ft at 9:30AM Sep 30, 2014Observed: 3.83 ft at 9:45AM Sep 30, 2014Observed: 3.83 ft at 10:00AM Sep 30, 2014Observed: 3.82 ft at 10:15AM Sep 30, 2014Observed: 3.82 ft at 10:30AM Sep 30, 2014Observed: 3.82 ft at 10:45AM Sep 30, 2014Observed: 3.82 ft at 11:00AM Sep 30, 2014Observed: 3.82 ft at 11:15AM Sep 30, 2014Observed: 3.82 ft at 11:30AM Sep 30, 2014Observed: 3.82 ft at 11:45AM Sep 30, 2014Observed: 3.82 ft at 12:00PM Sep 30, 2014Observed: 3.82 ft at 12:15PM Sep 30, 2014Observed: 3.81 ft at 12:30PM Sep 30, 2014Observed: 3.81 ft at 12:45PM Sep 30, 2014Observed: 3.81 ft at 1:00PM Sep 30, 2014Observed: 3.81 ft at 1:15PM Sep 30, 2014Observed: 3.81 ft at 1:30PM Sep 30, 2014Observed: 3.81 ft at 1:45PM Sep 30, 2014Observed: 3.81 ft at 2:00PM Sep 30, 2014Observed: 3.81 ft at 2:15PM Sep 30, 2014Observed: 3.81 ft at 2:30PM Sep 30, 2014Observed: 3.81 ft at 2:45PM Sep 30, 2014Observed: 3.81 ft at 3:00PM Sep 30, 2014Observed: 3.81 ft at 3:15PM Sep 30, 2014Observed: 3.81 ft at 3:30PM Sep 30, 2014Observed: 3.81 ft at 3:45PM Sep 30, 2014Observed: 3.8 ft at 4:00PM Sep 30, 2014Observed: 3.8 ft at 4:15PM Sep 30, 2014Observed: 3.8 ft at 4:30PM Sep 30, 2014Observed: 3.8 ft at 4:45PM Sep 30, 2014Observed: 3.8 ft at 5:00PM Sep 30, 2014Observed: 3.8 ft at 5:15PM Sep 30, 2014Observed: 3.8 ft at 5:30PM Sep 30, 2014Observed: 3.8 ft at 5:45PM Sep 30, 2014Observed: 3.79 ft at 6:00PM Sep 30, 2014Observed: 3.79 ft at 6:15PM Sep 30, 2014Observed: 3.79 ft at 6:30PM Sep 30, 2014Observed: 3.79 ft at 6:45PM Sep 30, 2014Observed: 3.79 ft at 7:00PM Sep 30, 2014Observed: 3.79 ft at 7:15PM Sep 30, 2014Observed: 3.79 ft at 7:30PM Sep 30, 2014Observed: 3.79 ft at 7:45PM Sep 30, 2014Observed: 3.79 ft at 8:00PM Sep 30, 2014Observed: 3.79 ft at 8:15PM Sep 30, 2014Observed: 3.79 ft at 8:30PM Sep 30, 2014Observed: 3.79 ft at 8:45PM Sep 30, 2014Observed: 3.79 ft at 9:00PM Sep 30, 2014Observed: 3.79 ft at 9:15PM Sep 30, 2014Observed: 3.79 ft at 9:30PM Sep 30, 2014Observed: 3.79 ft at 9:45PM Sep 30, 2014Observed: 3.79 ft at 10:00PM Sep 30, 2014Observed: 3.79 ft at 10:15PM Sep 30, 2014Observed: 3.79 ft at 10:30PM Sep 30, 2014Observed: 3.79 ft at 10:45PM Sep 30, 2014Observed: 3.79 ft at 11:00PM Sep 30, 2014Observed: 3.79 ft at 11:15PM Sep 30, 2014Observed: 3.79 ft at 11:30PM Sep 30, 2014Observed: 3.79 ft at 11:45PM Sep 30, 2014Observed: 3.79 ft at 12:00AM Oct 01, 2014Observed: 3.79 ft at 12:15AM Oct 01, 2014Observed: 3.79 ft at 12:30AM Oct 01, 2014Observed: 3.79 ft at 12:45AM Oct 01, 2014Observed: 3.79 ft at 1:00AM Oct 01, 2014Observed: 3.79 ft at 1:15AM Oct 01, 2014Observed: 3.79 ft at 1:30AM Oct 01, 2014Observed: 3.79 ft at 1:45AM Oct 01, 2014Observed: 3.79 ft at 2:00AM Oct 01, 2014Observed: 3.79 ft at 2:15AM Oct 01, 2014Observed: 3.79 ft at 2:30AM Oct 01, 2014Observed: 3.79 ft at 2:45AM Oct 01, 2014Observed: 3.79 ft at 3:00AM Oct 01, 2014Observed: 3.79 ft at 3:15AM Oct 01, 2014Observed: 3.79 ft at 3:30AM Oct 01, 2014Observed: 3.79 ft at 3:45AM Oct 01, 2014Observed: 3.79 ft at 4:00AM Oct 01, 2014Observed: 3.79 ft at 4:15AM Oct 01, 2014Observed: 3.79 ft at 4:30AM Oct 01, 2014Observed: 3.79 ft at 4:45AM Oct 01, 2014Observed: 3.79 ft at 5:00AM Oct 01, 2014Observed: 3.79 ft at 5:15AM Oct 01, 2014Observed: 3.79 ft at 5:30AM Oct 01, 2014Observed: 3.79 ft at 5:45AM Oct 01, 2014Observed: 3.79 ft at 6:00AM Oct 01, 2014Observed: 3.79 ft at 6:15AM Oct 01, 2014Observed: 3.79 ft at 6:30AM Oct 01, 2014Observed: 3.79 ft at 6:45AM Oct 01, 2014Observed: 3.79 ft at 7:00AM Oct 01, 2014Observed: 3.79 ft at 7:15AM Oct 01, 2014Observed: 3.79 ft at 7:30AM Oct 01, 2014Observed: 3.79 ft at 7:45AM Oct 01, 2014Observed: 3.79 ft at 8:00AM Oct 01, 2014Observed: 3.79 ft at 8:15AM Oct 01, 2014Observed: 3.79 ft at 8:30AM Oct 01, 2014Observed: 3.79 ft at 8:45AM Oct 01, 2014Observed: 3.79 ft at 9:00AM Oct 01, 2014Observed: 3.79 ft at 9:15AM Oct 01, 2014Observed: 3.79 ft at 9:30AM Oct 01, 2014Observed: 3.79 ft at 9:45AM Oct 01, 2014Observed: 3.79 ft at 10:00AM Oct 01, 2014Observed: 3.79 ft at 10:15AM Oct 01, 2014Observed: 3.79 ft at 10:30AM Oct 01, 2014Observed: 3.79 ft at 10:45AM Oct 01, 2014Observed: 3.79 ft at 11:00AM Oct 01, 2014Observed: 3.79 ft at 11:15AM Oct 01, 2014Observed: 3.79 ft at 11:30AM Oct 01, 2014Observed: 3.79 ft at 11:45AM Oct 01, 2014Observed: 3.79 ft at 12:00PM Oct 01, 2014Observed: 3.79 ft at 12:15PM Oct 01, 2014Observed: 3.79 ft at 12:30PM Oct 01, 2014Observed: 3.79 ft at 12:45PM Oct 01, 2014Observed: 3.79 ft at 1:00PM Oct 01, 2014Observed: 3.79 ft at 1:15PM Oct 01, 2014Observed: 3.79 ft at 1:30PM Oct 01, 2014Observed: 3.79 ft at 1:45PM Oct 01, 2014Observed: 3.79 ft at 2:00PM Oct 01, 2014Observed: 3.79 ft at 2:15PM Oct 01, 2014Observed: 3.79 ft at 2:30PM Oct 01, 2014Observed: 3.79 ft at 2:45PM Oct 01, 2014Observed: 3.79 ft at 3:00PM Oct 01, 2014Observed: 3.79 ft at 3:15PM Oct 01, 2014Observed: 3.79 ft at 3:30PM Oct 01, 2014Observed: 3.79 ft at 3:45PM Oct 01, 2014Observed: 3.79 ft at 4:00PM Oct 01, 2014Observed: 3.79 ft at 4:15PM Oct 01, 2014Observed: 3.79 ft at 4:30PM Oct 01, 2014Observed: 3.79 ft at 4:45PM Oct 01, 2014Observed: 3.79 ft at 5:00PM Oct 01, 2014Observed: 3.79 ft at 5:15PM Oct 01, 2014Observed: 3.78 ft at 5:30PM Oct 01, 2014Observed: 3.78 ft at 5:45PM Oct 01, 2014Observed: 3.78 ft at 6:00PM Oct 01, 2014Observed: 3.78 ft at 6:15PM Oct 01, 2014Observed: 3.78 ft at 6:30PM Oct 01, 2014Observed: 3.78 ft at 6:45PM Oct 01, 2014Observed: 3.78 ft at 7:00PM Oct 01, 2014Observed: 3.78 ft at 7:15PM Oct 01, 2014Observed: 3.78 ft at 7:30PM Oct 01, 2014Observed: 3.78 ft at 7:45PM Oct 01, 2014Observed: 3.78 ft at 8:00PM Oct 01, 2014Observed: 3.78 ft at 8:15PM Oct 01, 2014Observed: 3.78 ft at 8:30PM Oct 01, 2014Observed: 3.78 ft at 8:45PM Oct 01, 2014Observed: 3.78 ft at 9:00PM Oct 01, 2014Observed: 3.78 ft at 9:15PM Oct 01, 2014Observed: 3.78 ft at 9:30PM Oct 01, 2014Observed: 3.78 ft at 9:45PM Oct 01, 2014Observed: 3.78 ft at 10:00PM Oct 01, 2014Observed: 3.78 ft at 10:15PM Oct 01, 2014Observed: 3.77 ft at 10:30PM Oct 01, 2014Observed: 3.77 ft at 10:45PM Oct 01, 2014Observed: 3.77 ft at 11:00PM Oct 01, 2014Observed: 3.77 ft at 11:15PM Oct 01, 2014Observed: 3.77 ft at 11:30PM Oct 01, 2014Observed: 3.77 ft at 11:45PM Oct 01, 2014Observed: 3.77 ft at 12:00AM Oct 02, 2014Observed: 3.77 ft at 12:15AM Oct 02, 2014Observed: 3.77 ft at 12:30AM Oct 02, 2014Observed: 3.77 ft at 12:45AM Oct 02, 2014Observed: 3.77 ft at 1:00AM Oct 02, 2014Observed: 3.77 ft at 1:15AM Oct 02, 2014Observed: 3.77 ft at 1:30AM Oct 02, 2014Observed: 3.77 ft at 1:45AM Oct 02, 2014Observed: 3.77 ft at 2:00AM Oct 02, 2014Observed: 3.77 ft at 2:15AM Oct 02, 2014Observed: 3.77 ft at 2:30AM Oct 02, 2014Observed: 3.77 ft at 2:45AM Oct 02, 2014Observed: 3.77 ft at 3:00AM Oct 02, 2014Observed: 3.77 ft at 3:15AM Oct 02, 2014Observed: 3.77 ft at 3:30AM Oct 02, 2014Observed: 3.77 ft at 3:45AM Oct 02, 2014Observed: 3.77 ft at 4:00AM Oct 02, 2014Observed: 3.77 ft at 4:15AM Oct 02, 2014Observed: 3.77 ft at 4:30AM Oct 02, 2014Observed: 3.77 ft at 4:45AM Oct 02, 2014Observed: 3.76 ft at 5:00AM Oct 02, 2014Highest Forecast: 3.71 ft 11:00AM Oct 02, 2014Forecast: 3.69 ft 5:00PM Oct 02, 2014Forecast: 3.68 ft 11:00PM Oct 02, 2014Forecast: 3.67 ft 5:00AM Oct 03, 2014Forecast: 3.65 ft 11:00AM Oct 03, 2014Forecast: 3.65 ft 5:00PM Oct 03, 2014Forecast: 3.64 ft 11:00PM Oct 03, 2014Forecast: 3.63 ft 5:00AM Oct 04, 2014Forecast: 3.63 ft 11:00AM Oct 04, 2014Forecast: 3.63 ft 5:00PM Oct 04, 2014Forecast: 3.62 ft 11:00PM Oct 04, 2014Forecast: 3.62 ft 5:00AM Oct 05, 2014Forecast: 3.61 ft 11:00AM Oct 05, 2014Forecast: 3.61 ft 5:00PM Oct 05, 2014Forecast: 3.61 ft 11:00PM Oct 05, 2014Forecast: 3.6 ft 5:00AM Oct 06, 2014USGS--Water Resources of the United StatesCGMW1(plotting HGIRG) Graph Created (5:17AM Oct 2, 2014)ObservedForecast (issued 8:50AM Oct 1)Latest observed value: 3.76 ft at 5:00 AM PDT 2-Oct-2014. Flood Stage is 14 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Chehalis River near Grand Mound are issued routinely year-round.
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Upstream Gauge - at Centralia Upstream Gauge Downstream Gauge Downstream Gauge - at Porter
Flood Categories (in feet)
Major Flood Stage:17
Moderate Flood Stage:15.5
Flood Stage:14
Action Stage:0

Historical Crests
(1) 20.23 ft on 12/04/2007
(2) 19.98 ft on 02/09/1996
(3) 19.34 ft on 01/10/1990
(4) 18.41 ft on 11/25/1986
(5) 18.39 ft on 12/29/1937
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(P): Preliminary values subject to further review.

Low Water Records
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
Disclaimer
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
19 the Chehalis River in Thurston County will cause severe near record flooding...with deep and swift flood waters inundating the Independence Valley. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
17.5 the Chehalis River in Thurston County will cause major flooding...inundating roads and farm lands in Independence Valley. Deep and swift flood waters will cover SR-12 and James...Independence and Moon Roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
15.5 the Chehalis River in Thurston County will flood several roads in Independence Valley with swiftly moving water including SR-12 and James...Independence...Moon and Anderson Roads. Flood waters will cut off access to and from Chehalis Reservation and inundate nearby farm lands. Some residential structures may be threatened.
14 the Chehalis River in Thurston County will flood several roads in Independence Valley including James Road...Independence Road and Moon road. Flood waters will also cover nearby farm lands.
12.5 the Chehalis River in Thurston County will locally spill out of its banks into nearby fields and over a few roads.
About This Location Collapse

Latitude: 46.776111° N, Longitude: 123.034444° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 14 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(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 29 123.65 ft 137.65 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

Additional Information Collapse
Chehalis River Basin Flood Authority's Early Warning System:http://lewiscountywa.gov/chehalis-river-basin-flood-authority
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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
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Seattle, WA 98115-6349
(206) 526-6087
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Page last modified: 27-Aug-2014 7:09 PM
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