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Hydrograph River at a Glance Download
Cowlitz River at Castle Rock Stage (ft)Flow (kcfs)Observed: 32.9 ft at 7:30AM Jul 30, 2015Observed: 32.89 ft at 7:45AM Jul 30, 2015Observed: 32.89 ft at 8:00AM Jul 30, 2015Observed: 32.88 ft at 8:15AM Jul 30, 2015Observed: 32.89 ft at 8:30AM Jul 30, 2015Observed: 32.9 ft at 8:45AM Jul 30, 2015Observed: 32.89 ft at 9:00AM Jul 30, 2015Observed: 32.89 ft at 9:15AM Jul 30, 2015Observed: 32.9 ft at 9:30AM Jul 30, 2015Observed: 32.9 ft at 9:45AM Jul 30, 2015Observed: 32.9 ft at 10:00AM Jul 30, 2015Observed: 32.9 ft at 10:15AM Jul 30, 2015Observed: 32.91 ft at 10:30AM Jul 30, 2015Observed: 32.89 ft at 10:45AM Jul 30, 2015Observed: 32.89 ft at 11:00AM Jul 30, 2015Observed: 32.9 ft at 11:15AM Jul 30, 2015Observed: 32.91 ft at 11:30AM Jul 30, 2015Observed: 32.9 ft at 11:45AM Jul 30, 2015Observed: 32.91 ft at 12:00PM Jul 30, 2015Observed: 32.9 ft at 12:15PM Jul 30, 2015Observed: 32.86 ft at 12:30PM Jul 30, 2015Observed: 32.9 ft at 12:45PM Jul 30, 2015Observed: 32.9 ft at 1:00PM Jul 30, 2015Observed: 32.9 ft at 1:15PM Jul 30, 2015Observed: 32.92 ft at 1:30PM Jul 30, 2015Observed: 32.91 ft at 1:45PM Jul 30, 2015Observed: 32.91 ft at 2:00PM Jul 30, 2015Observed: 32.93 ft at 2:15PM Jul 30, 2015Observed: 32.92 ft at 2:30PM Jul 30, 2015Observed: 32.91 ft at 2:45PM Jul 30, 2015Observed: 32.92 ft at 3:00PM Jul 30, 2015Observed: 32.93 ft at 3:15PM Jul 30, 2015Observed: 32.91 ft at 3:30PM Jul 30, 2015Observed: 32.92 ft at 3:45PM Jul 30, 2015Observed: 32.93 ft at 4:00PM Jul 30, 2015Observed: 32.92 ft at 4:15PM Jul 30, 2015Observed: 32.93 ft at 4:30PM Jul 30, 2015Observed: 32.93 ft at 4:45PM Jul 30, 2015Observed: 32.93 ft at 5:00PM Jul 30, 2015Observed: 32.93 ft at 5:15PM Jul 30, 2015Observed: 32.94 ft at 5:30PM Jul 30, 2015Observed: 32.92 ft at 5:45PM Jul 30, 2015Observed: 32.94 ft at 6:00PM Jul 30, 2015Observed: 32.94 ft at 6:15PM Jul 30, 2015Observed: 32.95 ft at 6:30PM Jul 30, 2015Observed: 32.96 ft at 6:45PM Jul 30, 2015Observed: 32.98 ft at 7:00PM Jul 30, 2015Observed: 33 ft at 7:15PM Jul 30, 2015Observed: 33.01 ft at 7:30PM Jul 30, 2015Observed: 33.04 ft at 7:45PM Jul 30, 2015Observed: 33.04 ft at 8:00PM Jul 30, 2015Observed: 33.06 ft at 8:15PM Jul 30, 2015Observed: 33.07 ft at 8:30PM Jul 30, 2015Observed: 33.08 ft at 8:45PM Jul 30, 2015Observed: 33.09 ft at 9:00PM Jul 30, 2015Observed: 33.1 ft at 9:15PM Jul 30, 2015Observed: 33.1 ft at 9:30PM Jul 30, 2015Observed: 33.12 ft at 9:45PM Jul 30, 2015Observed: 33.11 ft at 10:00PM Jul 30, 2015Observed: 33.12 ft at 10:15PM Jul 30, 2015Observed: 33.12 ft at 10:30PM Jul 30, 2015Observed: 33.12 ft at 10:45PM Jul 30, 2015Observed: 33.12 ft at 11:00PM Jul 30, 2015Observed: 33.12 ft at 11:15PM Jul 30, 2015Observed: 33.11 ft at 11:30PM Jul 30, 2015Observed: 33.11 ft at 11:45PM Jul 30, 2015Observed: 33.12 ft at 12:00AM Jul 31, 2015Observed: 33.12 ft at 12:15AM Jul 31, 2015Observed: 33.12 ft at 12:30AM Jul 31, 2015Observed: 33.13 ft at 12:45AM Jul 31, 2015Observed: 33.13 ft at 1:00AM Jul 31, 2015Observed: 33.12 ft at 1:15AM Jul 31, 2015Observed: 33.12 ft at 1:30AM Jul 31, 2015Observed: 33.11 ft at 1:45AM Jul 31, 2015Observed: 33.12 ft at 2:00AM Jul 31, 2015Observed: 33.12 ft at 2:15AM Jul 31, 2015Observed: 33.12 ft at 2:30AM Jul 31, 2015Observed: 33.12 ft at 2:45AM Jul 31, 2015Observed: 33.12 ft at 3:00AM Jul 31, 2015Observed: 33.11 ft at 3:15AM Jul 31, 2015Observed: 33.1 ft at 3:30AM Jul 31, 2015Observed: 33.11 ft at 3:45AM Jul 31, 2015Observed: 33.11 ft at 4:00AM Jul 31, 2015Observed: 33.1 ft at 4:15AM Jul 31, 2015Observed: 33.11 ft at 4:30AM Jul 31, 2015Observed: 33.1 ft at 4:45AM Jul 31, 2015Observed: 33.11 ft at 5:00AM Jul 31, 2015Observed: 33.1 ft at 5:15AM Jul 31, 2015Observed: 33.11 ft at 5:30AM Jul 31, 2015Observed: 33.1 ft at 5:45AM Jul 31, 2015Observed: 33.1 ft at 6:00AM Jul 31, 2015Observed: 33.11 ft at 6:15AM Jul 31, 2015Observed: 33.11 ft at 6:30AM Jul 31, 2015Observed: 33.11 ft at 6:45AM Jul 31, 2015Observed: 33.12 ft at 7:00AM Jul 31, 2015Observed: 33.11 ft at 7:15AM Jul 31, 2015Observed: 33.11 ft at 7:30AM Jul 31, 2015Observed: 33.1 ft at 7:45AM Jul 31, 2015Observed: 33.11 ft at 8:00AM Jul 31, 2015Observed: 33.1 ft at 8:15AM Jul 31, 2015Observed: 33.11 ft at 8:30AM Jul 31, 2015Observed: 33.1 ft at 8:45AM Jul 31, 2015Observed: 33.09 ft at 9:00AM Jul 31, 2015Observed: 33.11 ft at 9:15AM Jul 31, 2015Observed: 33.11 ft at 9:30AM Jul 31, 2015Observed: 33.1 ft at 9:45AM Jul 31, 2015Observed: 33.11 ft at 10:00AM Jul 31, 2015Observed: 33.1 ft at 10:15AM Jul 31, 2015Observed: 33.11 ft at 10:30AM Jul 31, 2015Observed: 33.09 ft at 10:45AM Jul 31, 2015Observed: 33.12 ft at 11:00AM Jul 31, 2015Observed: 33.12 ft at 11:15AM Jul 31, 2015Observed: 33.1 ft at 11:30AM Jul 31, 2015Observed: 33.11 ft at 11:45AM Jul 31, 2015Observed: 33.11 ft at 12:00PM Jul 31, 2015Observed: 33.12 ft at 12:15PM Jul 31, 2015Observed: 33.12 ft at 12:30PM Jul 31, 2015Observed: 33.12 ft at 12:45PM Jul 31, 2015Observed: 33.11 ft at 1:00PM Jul 31, 2015Observed: 33.11 ft at 1:15PM Jul 31, 2015Observed: 33.12 ft at 1:30PM Jul 31, 2015Observed: 33.12 ft at 1:45PM Jul 31, 2015Observed: 33.11 ft at 2:00PM Jul 31, 2015Observed: 33.12 ft at 2:15PM Jul 31, 2015Observed: 33.12 ft at 2:30PM Jul 31, 2015Observed: 33.12 ft at 2:45PM Jul 31, 2015Observed: 33.12 ft at 3:00PM Jul 31, 2015Observed: 33.13 ft at 3:15PM Jul 31, 2015Observed: 33.13 ft at 3:30PM Jul 31, 2015Observed: 33.14 ft at 3:45PM Jul 31, 2015Observed: 33.14 ft at 4:00PM Jul 31, 2015Observed: 33.13 ft at 4:15PM Jul 31, 2015Observed: 33.13 ft at 4:30PM Jul 31, 2015Observed: 33.14 ft at 4:45PM Jul 31, 2015Observed: 33.13 ft at 5:00PM Jul 31, 2015Observed: 33.13 ft at 5:15PM Jul 31, 2015Observed: 33.14 ft at 5:30PM Jul 31, 2015Highest Observation: 33.15 ft at 5:45PM Jul 31, 2015Observed: 33.14 ft at 6:00PM Jul 31, 2015Highest Observation: 33.15 ft at 6:15PM Jul 31, 2015Observed: 33.14 ft at 6:30PM Jul 31, 2015Highest Observation: 33.15 ft at 6:45PM Jul 31, 2015Observed: 33.14 ft at 7:00PM Jul 31, 2015Observed: 33.14 ft at 7:15PM Jul 31, 2015Observed: 33.14 ft at 7:30PM Jul 31, 2015Highest Observation: 33.15 ft at 7:45PM Jul 31, 2015Observed: 33.14 ft at 8:00PM Jul 31, 2015Observed: 33.14 ft at 8:15PM Jul 31, 2015Observed: 33.14 ft at 8:30PM Jul 31, 2015Observed: 33.13 ft at 8:45PM Jul 31, 2015Observed: 33.13 ft at 9:00PM Jul 31, 2015Observed: 33.13 ft at 9:15PM Jul 31, 2015Observed: 33.13 ft at 9:30PM Jul 31, 2015Observed: 33.13 ft at 9:45PM Jul 31, 2015Observed: 33.13 ft at 10:00PM Jul 31, 2015Observed: 33.13 ft at 10:15PM Jul 31, 2015Observed: 33.12 ft at 10:30PM Jul 31, 2015Observed: 33.11 ft at 10:45PM Jul 31, 2015Observed: 33.11 ft at 11:00PM Jul 31, 2015Observed: 33.11 ft at 11:15PM Jul 31, 2015Observed: 33.1 ft at 11:30PM Jul 31, 2015Observed: 33.09 ft at 11:45PM Jul 31, 2015Observed: 33.08 ft at 12:00AM Aug 01, 2015Observed: 33.07 ft at 12:15AM Aug 01, 2015Observed: 33.07 ft at 12:30AM Aug 01, 2015Observed: 33.06 ft at 12:45AM Aug 01, 2015Observed: 33.06 ft at 1:00AM Aug 01, 2015Observed: 33.05 ft at 1:15AM Aug 01, 2015Observed: 33.04 ft at 1:30AM Aug 01, 2015Observed: 33.04 ft at 1:45AM Aug 01, 2015Observed: 33.02 ft at 2:00AM Aug 01, 2015Observed: 33.02 ft at 2:15AM Aug 01, 2015Observed: 33.01 ft at 2:30AM Aug 01, 2015Observed: 33 ft at 2:45AM Aug 01, 2015Observed: 32.99 ft at 3:00AM Aug 01, 2015Observed: 33 ft at 3:15AM Aug 01, 2015Observed: 32.98 ft at 3:30AM Aug 01, 2015Observed: 32.97 ft at 3:45AM Aug 01, 2015Observed: 32.97 ft at 4:00AM Aug 01, 2015Observed: 32.96 ft at 4:15AM Aug 01, 2015Observed: 32.95 ft at 4:30AM Aug 01, 2015Observed: 32.95 ft at 4:45AM Aug 01, 2015Observed: 32.94 ft at 5:00AM Aug 01, 2015Observed: 32.93 ft at 5:15AM Aug 01, 2015Observed: 32.93 ft at 5:30AM Aug 01, 2015Observed: 32.91 ft at 5:45AM Aug 01, 2015Observed: 32.91 ft at 6:00AM Aug 01, 2015Observed: 32.91 ft at 6:15AM Aug 01, 2015Observed: 32.9 ft at 6:30AM Aug 01, 2015Observed: 32.89 ft at 6:45AM Aug 01, 2015Observed: 32.89 ft at 7:00AM Aug 01, 2015Observed: 32.87 ft at 7:15AM Aug 01, 2015Observed: 32.87 ft at 7:30AM Aug 01, 2015Observed: 32.86 ft at 7:45AM Aug 01, 2015Observed: 32.85 ft at 8:00AM Aug 01, 2015Observed: 32.85 ft at 8:15AM Aug 01, 2015Observed: 32.84 ft at 8:30AM Aug 01, 2015Observed: 32.83 ft at 8:45AM Aug 01, 2015Observed: 32.83 ft at 9:00AM Aug 01, 2015Observed: 32.79 ft at 9:15AM Aug 01, 2015Observed: 32.82 ft at 9:30AM Aug 01, 2015Observed: 32.81 ft at 9:45AM Aug 01, 2015Observed: 32.79 ft at 10:00AM Aug 01, 2015Observed: 32.8 ft at 10:15AM Aug 01, 2015Observed: 32.8 ft at 10:30AM Aug 01, 2015Observed: 32.79 ft at 10:45AM Aug 01, 2015Observed: 32.79 ft at 11:00AM Aug 01, 2015Observed: 32.78 ft at 11:15AM Aug 01, 2015Observed: 32.76 ft at 11:30AM Aug 01, 2015Observed: 32.77 ft at 11:45AM Aug 01, 2015Observed: 32.75 ft at 12:00PM Aug 01, 2015Observed: 32.75 ft at 12:15PM Aug 01, 2015Observed: 32.74 ft at 12:30PM Aug 01, 2015Observed: 32.74 ft at 12:45PM Aug 01, 2015Observed: 32.73 ft at 1:00PM Aug 01, 2015Observed: 32.73 ft at 1:15PM Aug 01, 2015Observed: 32.68 ft at 1:30PM Aug 01, 2015Observed: 32.7 ft at 1:45PM Aug 01, 2015Observed: 32.7 ft at 2:00PM Aug 01, 2015Observed: 32.69 ft at 2:15PM Aug 01, 2015Observed: 32.69 ft at 2:30PM Aug 01, 2015Observed: 32.69 ft at 2:45PM Aug 01, 2015Observed: 32.69 ft at 3:00PM Aug 01, 2015Observed: 32.69 ft at 3:15PM Aug 01, 2015Observed: 32.68 ft at 3:30PM Aug 01, 2015Observed: 32.69 ft at 3:45PM Aug 01, 2015Observed: 32.7 ft at 4:00PM Aug 01, 2015Observed: 32.71 ft at 4:15PM Aug 01, 2015Observed: 32.73 ft at 4:30PM Aug 01, 2015Observed: 32.74 ft at 4:45PM Aug 01, 2015Observed: 32.75 ft at 5:00PM Aug 01, 2015Observed: 32.75 ft at 5:15PM Aug 01, 2015Observed: 32.76 ft at 5:30PM Aug 01, 2015Observed: 32.77 ft at 5:45PM Aug 01, 2015Observed: 32.78 ft at 6:00PM Aug 01, 2015Observed: 32.78 ft at 6:15PM Aug 01, 2015Observed: 32.78 ft at 6:30PM Aug 01, 2015Observed: 32.79 ft at 6:45PM Aug 01, 2015Observed: 32.79 ft at 7:00PM Aug 01, 2015Observed: 32.78 ft at 7:15PM Aug 01, 2015Observed: 32.77 ft at 7:30PM Aug 01, 2015Observed: 32.78 ft at 7:45PM Aug 01, 2015Observed: 32.76 ft at 8:00PM Aug 01, 2015Observed: 32.75 ft at 8:15PM Aug 01, 2015Observed: 32.76 ft at 8:30PM Aug 01, 2015Observed: 32.74 ft at 8:45PM Aug 01, 2015Observed: 32.74 ft at 9:00PM Aug 01, 2015Observed: 32.73 ft at 9:15PM Aug 01, 2015Observed: 32.72 ft at 9:30PM Aug 01, 2015Observed: 32.71 ft at 9:45PM Aug 01, 2015Observed: 32.71 ft at 10:00PM Aug 01, 2015Observed: 32.69 ft at 10:15PM Aug 01, 2015Observed: 32.69 ft at 10:30PM Aug 01, 2015Observed: 32.69 ft at 10:45PM Aug 01, 2015Observed: 32.69 ft at 11:00PM Aug 01, 2015Observed: 32.67 ft at 11:15PM Aug 01, 2015Observed: 32.68 ft at 11:30PM Aug 01, 2015Observed: 32.65 ft at 11:45PM Aug 01, 2015Observed: 32.66 ft at 12:00AM Aug 02, 2015Observed: 32.65 ft at 12:15AM Aug 02, 2015Observed: 32.65 ft at 12:30AM Aug 02, 2015Observed: 32.64 ft at 12:45AM Aug 02, 2015Observed: 32.63 ft at 1:00AM Aug 02, 2015Observed: 32.61 ft at 1:15AM Aug 02, 2015Observed: 32.61 ft at 1:30AM Aug 02, 2015Observed: 32.59 ft at 1:45AM Aug 02, 2015Observed: 32.58 ft at 2:00AM Aug 02, 2015Observed: 32.57 ft at 2:15AM Aug 02, 2015Observed: 32.56 ft at 2:30AM Aug 02, 2015Observed: 32.54 ft at 2:45AM Aug 02, 2015Observed: 32.53 ft at 3:00AM Aug 02, 2015Observed: 32.5 ft at 3:15AM Aug 02, 2015Observed: 32.49 ft at 3:30AM Aug 02, 2015Observed: 32.47 ft at 3:45AM Aug 02, 2015Observed: 32.47 ft at 4:00AM Aug 02, 2015Observed: 32.45 ft at 4:15AM Aug 02, 2015Observed: 32.44 ft at 4:30AM Aug 02, 2015Observed: 32.42 ft at 4:45AM Aug 02, 2015Observed: 32.42 ft at 5:00AM Aug 02, 2015Observed: 32.41 ft at 5:15AM Aug 02, 2015Observed: 32.39 ft at 5:30AM Aug 02, 2015Observed: 32.39 ft at 5:45AM Aug 02, 2015Observed: 32.38 ft at 6:00AM Aug 02, 2015Observed: 32.38 ft at 6:15AM Aug 02, 2015Observed: 32.37 ft at 6:30AM Aug 02, 2015Highest Forecast: 32.93 ft 11:00AM Aug 02, 2015Forecast: 32.9 ft 5:00PM Aug 02, 2015Forecast: 32.84 ft 11:00PM Aug 02, 2015Forecast: 32.77 ft 5:00AM Aug 03, 2015Forecast: 32.44 ft 11:00AM Aug 03, 2015Forecast: 31.86 ft 5:00PM Aug 03, 2015Forecast: 31.74 ft 11:00PM Aug 03, 2015Forecast: 31.74 ft 5:00AM Aug 04, 2015Forecast: 31.74 ft 11:00AM Aug 04, 2015Forecast: 31.74 ft 5:00PM Aug 04, 2015Forecast: 31.73 ft 11:00PM Aug 04, 2015Forecast: 31.73 ft 5:00AM Aug 05, 2015Forecast: 31.73 ft 11:00AM Aug 05, 2015Forecast: 31.73 ft 5:00PM Aug 05, 2015Forecast: 31.72 ft 11:00PM Aug 05, 2015Forecast: 31.72 ft 5:00AM Aug 06, 2015Forecast: 31.72 ft 11:00AM Aug 06, 2015Forecast: 31.72 ft 5:00PM Aug 06, 2015Forecast: 31.71 ft 11:00PM Aug 06, 2015Forecast: 31.71 ft 5:00AM Aug 07, 2015USGS--Water Resources of the United StatesCASW1(plotting HGIRG) Graph Created (7:17AM Aug 2, 2015)ObservedForecast (issued 8:16AM Aug 1)Latest observed value: 32.37 ft at 6:30 AM PDT 2-Aug-2015. Flood Stage is 48 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts for the Cowlitz River at Castle Rock are issued routinely year-round.
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Upstream Gauge - below Mayfield Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Kelso
Flood Categories (in feet)
Major Flood Stage: 57
Moderate Flood Stage: 54
Flood Stage: 48
Action Stage: 46
Low Stage (in feet): 0

Historic Crests
(1) 55.76 ft on 02/08/1996
(2) 55.16 ft on 11/30/1995
(3) 54.70 ft on 01/08/2009
(4) 52.95 ft on 05/18/1980
(5) 50.60 ft on 01/09/1990
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 54.70 ft on 01/08/2009
(2) 49.78 ft on 11/07/2006
(3) 47.58 ft on 02/01/2003
(4) 46.59 ft on 11/26/1998
(5) 46.88 ft on 12/29/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:14
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
57 Above 57.0 feet, widespread and major flooding of homes and property just upstream and downstream of Castle Rock. Major flooding of the fairgrounds area west of Castle Rock. Numerous road closures. Possible overtopping or weakening of portions of the levee protecting Castle Rock, especially sections downstream of the highway bridge.
54 Above 54 feet, expect widespread flooding of residential and business areas, especially west of the river in the Four Corners area and along Hwy 411. Also expect widespread flooding of agricultural land. Levees have historically been threatened of overtopping at this and higher levels.
51 Above 51 feet, flooding of buildings and residential areas begins, especially west of the river along Hwy 411 and around Four Corners. Also expect widespread flooding of low-lying agricultural land.
48 Above 48 feet, expect flooding of several roads and low-lying agricultural lands in areas not protected by levees.
Photos
(1) USGS gage house and A Street Bridge
(2) USGS gage house and view upstream
(3) View downstream from gage house
About This Location Collapse

Latitude: 46.274444° N, Longitude: 122.912500° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 48 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 0 ft 48 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available 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
Archived/Historical Data at USACE DataQuery
10-day Forecast/Trend, Northwest River Forecast Center
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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Page last modified: 12-Feb-2015 9:33 PM
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