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Hydrograph River at a Glance Download
Cowlitz River at Castle Rock Stage (ft)Flow (kcfs)Observed: 36.64 ft at 11:00AM Feb 11, 2016Observed: 36.67 ft at 11:15AM Feb 11, 2016Observed: 36.67 ft at 11:30AM Feb 11, 2016Observed: 36.66 ft at 11:45AM Feb 11, 2016Observed: 36.67 ft at 12:00PM Feb 11, 2016Observed: 36.68 ft at 12:15PM Feb 11, 2016Observed: 36.66 ft at 12:30PM Feb 11, 2016Observed: 36.65 ft at 12:45PM Feb 11, 2016Observed: 36.64 ft at 1:00PM Feb 11, 2016Observed: 36.65 ft at 1:15PM Feb 11, 2016Observed: 36.66 ft at 1:30PM Feb 11, 2016Observed: 36.65 ft at 1:45PM Feb 11, 2016Observed: 36.66 ft at 2:00PM Feb 11, 2016Observed: 36.64 ft at 2:15PM Feb 11, 2016Observed: 36.65 ft at 2:30PM Feb 11, 2016Observed: 36.68 ft at 2:45PM Feb 11, 2016Observed: 36.66 ft at 3:00PM Feb 11, 2016Observed: 36.65 ft at 3:15PM Feb 11, 2016Observed: 36.67 ft at 3:30PM Feb 11, 2016Observed: 36.67 ft at 3:45PM Feb 11, 2016Observed: 36.67 ft at 4:00PM Feb 11, 2016Observed: 36.68 ft at 4:15PM Feb 11, 2016Observed: 36.67 ft at 4:30PM Feb 11, 2016Observed: 36.67 ft at 4:45PM Feb 11, 2016Observed: 36.67 ft at 5:00PM Feb 11, 2016Observed: 36.67 ft at 5:15PM Feb 11, 2016Observed: 36.65 ft at 5:30PM Feb 11, 2016Observed: 36.66 ft at 5:45PM Feb 11, 2016Observed: 36.68 ft at 6:00PM Feb 11, 2016Observed: 36.67 ft at 6:15PM Feb 11, 2016Observed: 36.67 ft at 6:30PM Feb 11, 2016Observed: 36.67 ft at 6:45PM Feb 11, 2016Observed: 36.69 ft at 7:00PM Feb 11, 2016Observed: 36.69 ft at 7:15PM Feb 11, 2016Observed: 36.68 ft at 7:30PM Feb 11, 2016Observed: 36.68 ft at 7:45PM Feb 11, 2016Observed: 36.68 ft at 8:00PM Feb 11, 2016Observed: 36.69 ft at 8:15PM Feb 11, 2016Observed: 36.67 ft at 8:30PM Feb 11, 2016Observed: 36.69 ft at 8:45PM Feb 11, 2016Observed: 36.69 ft at 9:00PM Feb 11, 2016Observed: 36.68 ft at 9:15PM Feb 11, 2016Observed: 36.67 ft at 9:30PM Feb 11, 2016Observed: 36.7 ft at 9:45PM Feb 11, 2016Observed: 36.71 ft at 10:00PM Feb 11, 2016Observed: 36.7 ft at 10:15PM Feb 11, 2016Observed: 36.69 ft at 10:30PM Feb 11, 2016Observed: 36.7 ft at 10:45PM Feb 11, 2016Observed: 36.72 ft at 11:00PM Feb 11, 2016Observed: 36.7 ft at 11:15PM Feb 11, 2016Observed: 36.69 ft at 11:30PM Feb 11, 2016Observed: 36.7 ft at 11:45PM Feb 11, 2016Observed: 36.72 ft at 12:00AM Feb 12, 2016Observed: 36.72 ft at 12:15AM Feb 12, 2016Observed: 36.72 ft at 12:30AM Feb 12, 2016Observed: 36.73 ft at 12:45AM Feb 12, 2016Observed: 36.72 ft at 1:00AM Feb 12, 2016Observed: 36.73 ft at 1:15AM Feb 12, 2016Observed: 36.74 ft at 1:30AM Feb 12, 2016Observed: 36.74 ft at 1:45AM Feb 12, 2016Observed: 36.75 ft at 2:00AM Feb 12, 2016Observed: 36.76 ft at 2:15AM Feb 12, 2016Observed: 36.76 ft at 2:30AM Feb 12, 2016Observed: 36.76 ft at 2:45AM Feb 12, 2016Observed: 36.76 ft at 3:00AM Feb 12, 2016Observed: 36.76 ft at 3:15AM Feb 12, 2016Observed: 36.78 ft at 3:30AM Feb 12, 2016Observed: 36.77 ft at 3:45AM Feb 12, 2016Observed: 36.79 ft at 4:00AM Feb 12, 2016Observed: 36.79 ft at 4:15AM Feb 12, 2016Observed: 36.8 ft at 4:30AM Feb 12, 2016Observed: 36.78 ft at 4:45AM Feb 12, 2016Observed: 36.8 ft at 5:00AM Feb 12, 2016Observed: 36.81 ft at 5:15AM Feb 12, 2016Observed: 36.79 ft at 5:30AM Feb 12, 2016Observed: 36.8 ft at 5:45AM Feb 12, 2016Observed: 36.8 ft at 6:00AM Feb 12, 2016Observed: 36.8 ft at 6:15AM Feb 12, 2016Observed: 36.79 ft at 6:30AM Feb 12, 2016Observed: 36.76 ft at 6:45AM Feb 12, 2016Observed: 36.79 ft at 7:00AM Feb 12, 2016Observed: 36.79 ft at 7:15AM Feb 12, 2016Observed: 36.78 ft at 7:30AM Feb 12, 2016Observed: 36.79 ft at 7:45AM Feb 12, 2016Observed: 36.8 ft at 8:00AM Feb 12, 2016Observed: 36.8 ft at 8:15AM Feb 12, 2016Observed: 36.79 ft at 8:30AM Feb 12, 2016Observed: 36.79 ft at 8:45AM Feb 12, 2016Observed: 36.83 ft at 9:00AM Feb 12, 2016Observed: 36.83 ft at 9:15AM Feb 12, 2016Observed: 36.82 ft at 9:30AM Feb 12, 2016Observed: 36.82 ft at 9:45AM Feb 12, 2016Observed: 36.8 ft at 10:00AM Feb 12, 2016Observed: 36.8 ft at 10:15AM Feb 12, 2016Observed: 36.83 ft at 10:30AM Feb 12, 2016Observed: 36.78 ft at 10:45AM Feb 12, 2016Observed: 36.82 ft at 11:00AM Feb 12, 2016Observed: 36.83 ft at 11:15AM Feb 12, 2016Observed: 36.84 ft at 11:30AM Feb 12, 2016Observed: 36.82 ft at 11:45AM Feb 12, 2016Observed: 36.82 ft at 12:00PM Feb 12, 2016Observed: 36.82 ft at 12:15PM Feb 12, 2016Observed: 36.83 ft at 12:30PM Feb 12, 2016Observed: 36.83 ft at 12:45PM Feb 12, 2016Observed: 36.85 ft at 1:00PM Feb 12, 2016Observed: 36.83 ft at 1:15PM Feb 12, 2016Observed: 36.82 ft at 1:30PM Feb 12, 2016Observed: 36.85 ft at 1:45PM Feb 12, 2016Observed: 36.84 ft at 2:00PM Feb 12, 2016Observed: 36.84 ft at 2:15PM Feb 12, 2016Observed: 36.82 ft at 2:30PM Feb 12, 2016Observed: 36.81 ft at 2:45PM Feb 12, 2016Observed: 36.8 ft at 3:00PM Feb 12, 2016Observed: 36.8 ft at 3:15PM Feb 12, 2016Observed: 36.78 ft at 3:30PM Feb 12, 2016Observed: 36.76 ft at 3:45PM Feb 12, 2016Observed: 36.76 ft at 4:00PM Feb 12, 2016Observed: 36.74 ft at 4:15PM Feb 12, 2016Observed: 36.74 ft at 4:30PM Feb 12, 2016Observed: 36.73 ft at 4:45PM Feb 12, 2016Observed: 36.73 ft at 5:00PM Feb 12, 2016Observed: 36.7 ft at 5:15PM Feb 12, 2016Observed: 36.72 ft at 5:30PM Feb 12, 2016Observed: 36.71 ft at 5:45PM Feb 12, 2016Observed: 36.72 ft at 6:00PM Feb 12, 2016Observed: 36.7 ft at 6:15PM Feb 12, 2016Observed: 36.68 ft at 6:30PM Feb 12, 2016Observed: 36.71 ft at 6:45PM Feb 12, 2016Observed: 36.73 ft at 7:00PM Feb 12, 2016Observed: 36.72 ft at 7:15PM Feb 12, 2016Observed: 36.72 ft at 7:30PM Feb 12, 2016Observed: 36.71 ft at 7:45PM Feb 12, 2016Observed: 36.72 ft at 8:00PM Feb 12, 2016Observed: 36.71 ft at 8:15PM Feb 12, 2016Observed: 36.7 ft at 8:30PM Feb 12, 2016Observed: 36.72 ft at 8:45PM Feb 12, 2016Observed: 36.7 ft at 9:00PM Feb 12, 2016Observed: 36.7 ft at 9:15PM Feb 12, 2016Observed: 36.71 ft at 9:30PM Feb 12, 2016Observed: 36.71 ft at 9:45PM Feb 12, 2016Observed: 36.7 ft at 10:00PM Feb 12, 2016Observed: 36.69 ft at 10:15PM Feb 12, 2016Observed: 36.68 ft at 10:30PM Feb 12, 2016Observed: 36.69 ft at 10:45PM Feb 12, 2016Observed: 36.69 ft at 11:00PM Feb 12, 2016Observed: 36.69 ft at 11:15PM Feb 12, 2016Observed: 36.69 ft at 11:30PM Feb 12, 2016Observed: 36.69 ft at 11:45PM Feb 12, 2016Observed: 36.68 ft at 12:00AM Feb 13, 2016Observed: 36.69 ft at 12:15AM Feb 13, 2016Observed: 36.66 ft at 12:30AM Feb 13, 2016Observed: 36.68 ft at 12:45AM Feb 13, 2016Observed: 36.69 ft at 1:00AM Feb 13, 2016Observed: 36.68 ft at 1:15AM Feb 13, 2016Observed: 36.68 ft at 1:30AM Feb 13, 2016Observed: 36.69 ft at 1:45AM Feb 13, 2016Observed: 36.68 ft at 2:00AM Feb 13, 2016Observed: 36.68 ft at 2:15AM Feb 13, 2016Observed: 36.68 ft at 2:30AM Feb 13, 2016Observed: 36.69 ft at 2:45AM Feb 13, 2016Observed: 36.67 ft at 3:00AM Feb 13, 2016Observed: 36.67 ft at 3:15AM Feb 13, 2016Observed: 36.67 ft at 3:30AM Feb 13, 2016Observed: 36.68 ft at 3:45AM Feb 13, 2016Observed: 36.68 ft at 4:00AM Feb 13, 2016Observed: 36.69 ft at 4:15AM Feb 13, 2016Observed: 36.7 ft at 4:30AM Feb 13, 2016Observed: 36.7 ft at 4:45AM Feb 13, 2016Observed: 36.69 ft at 5:00AM Feb 13, 2016Observed: 36.7 ft at 5:15AM Feb 13, 2016Observed: 36.68 ft at 5:30AM Feb 13, 2016Observed: 36.67 ft at 5:45AM Feb 13, 2016Observed: 36.68 ft at 6:00AM Feb 13, 2016Observed: 36.69 ft at 6:15AM Feb 13, 2016Observed: 36.68 ft at 6:30AM Feb 13, 2016Observed: 36.67 ft at 6:45AM Feb 13, 2016Observed: 36.69 ft at 7:00AM Feb 13, 2016Observed: 36.68 ft at 7:15AM Feb 13, 2016Observed: 36.68 ft at 7:30AM Feb 13, 2016Observed: 36.67 ft at 7:45AM Feb 13, 2016Observed: 36.69 ft at 8:00AM Feb 13, 2016Observed: 36.68 ft at 8:15AM Feb 13, 2016Observed: 36.68 ft at 8:30AM Feb 13, 2016Observed: 36.69 ft at 8:45AM Feb 13, 2016Observed: 36.68 ft at 9:00AM Feb 13, 2016Observed: 36.68 ft at 9:15AM Feb 13, 2016Observed: 36.67 ft at 9:30AM Feb 13, 2016Observed: 36.69 ft at 9:45AM Feb 13, 2016Observed: 36.67 ft at 10:00AM Feb 13, 2016Observed: 36.68 ft at 10:15AM Feb 13, 2016Observed: 36.69 ft at 10:30AM Feb 13, 2016Observed: 36.68 ft at 10:45AM Feb 13, 2016Observed: 36.67 ft at 11:00AM Feb 13, 2016Observed: 36.7 ft at 11:15AM Feb 13, 2016Observed: 36.69 ft at 11:30AM Feb 13, 2016Observed: 36.67 ft at 11:45AM Feb 13, 2016Observed: 36.66 ft at 12:00PM Feb 13, 2016Observed: 36.69 ft at 12:15PM Feb 13, 2016Observed: 36.69 ft at 12:30PM Feb 13, 2016Observed: 36.68 ft at 12:45PM Feb 13, 2016Observed: 36.67 ft at 1:00PM Feb 13, 2016Observed: 36.68 ft at 1:15PM Feb 13, 2016Observed: 36.69 ft at 1:30PM Feb 13, 2016Observed: 36.68 ft at 1:45PM Feb 13, 2016Observed: 36.67 ft at 2:00PM Feb 13, 2016Observed: 36.67 ft at 2:15PM Feb 13, 2016Observed: 36.7 ft at 2:30PM Feb 13, 2016Observed: 36.68 ft at 2:45PM Feb 13, 2016Observed: 36.69 ft at 3:00PM Feb 13, 2016Observed: 36.69 ft at 3:15PM Feb 13, 2016Observed: 36.68 ft at 3:30PM Feb 13, 2016Observed: 36.7 ft at 3:45PM Feb 13, 2016Observed: 36.71 ft at 4:00PM Feb 13, 2016Observed: 36.72 ft at 4:15PM Feb 13, 2016Observed: 36.71 ft at 4:30PM Feb 13, 2016Observed: 36.72 ft at 4:45PM Feb 13, 2016Observed: 36.72 ft at 5:00PM Feb 13, 2016Observed: 36.71 ft at 5:15PM Feb 13, 2016Observed: 36.73 ft at 5:30PM Feb 13, 2016Observed: 36.74 ft at 5:45PM Feb 13, 2016Observed: 36.74 ft at 6:00PM Feb 13, 2016Observed: 36.74 ft at 6:15PM Feb 13, 2016Observed: 36.75 ft at 6:30PM Feb 13, 2016Observed: 36.77 ft at 6:45PM Feb 13, 2016Observed: 36.77 ft at 7:00PM Feb 13, 2016Observed: 36.79 ft at 7:15PM Feb 13, 2016Observed: 36.8 ft at 7:30PM Feb 13, 2016Observed: 36.8 ft at 7:45PM Feb 13, 2016Observed: 36.78 ft at 8:00PM Feb 13, 2016Observed: 36.8 ft at 8:15PM Feb 13, 2016Observed: 36.82 ft at 8:30PM Feb 13, 2016Observed: 36.83 ft at 8:45PM Feb 13, 2016Observed: 36.81 ft at 9:00PM Feb 13, 2016Observed: 36.83 ft at 9:15PM Feb 13, 2016Observed: 36.85 ft at 9:30PM Feb 13, 2016Observed: 36.85 ft at 9:45PM Feb 13, 2016Observed: 36.85 ft at 10:00PM Feb 13, 2016Observed: 36.88 ft at 10:15PM Feb 13, 2016Observed: 36.88 ft at 10:30PM Feb 13, 2016Observed: 36.91 ft at 10:45PM Feb 13, 2016Observed: 36.91 ft at 11:00PM Feb 13, 2016Observed: 36.92 ft at 11:15PM Feb 13, 2016Observed: 36.94 ft at 11:30PM Feb 13, 2016Observed: 36.95 ft at 11:45PM Feb 13, 2016Observed: 36.96 ft at 12:00AM Feb 14, 2016Observed: 36.95 ft at 12:15AM Feb 14, 2016Observed: 36.97 ft at 12:30AM Feb 14, 2016Observed: 37 ft at 12:45AM Feb 14, 2016Observed: 36.99 ft at 1:00AM Feb 14, 2016Observed: 36.99 ft at 1:15AM Feb 14, 2016Observed: 37.01 ft at 1:30AM Feb 14, 2016Observed: 37.03 ft at 1:45AM Feb 14, 2016Observed: 37.03 ft at 2:00AM Feb 14, 2016Observed: 37.03 ft at 2:15AM Feb 14, 2016Observed: 37.03 ft at 2:30AM Feb 14, 2016Observed: 37.04 ft at 2:45AM Feb 14, 2016Observed: 37.04 ft at 3:00AM Feb 14, 2016Observed: 37.05 ft at 3:15AM Feb 14, 2016Observed: 37.08 ft at 3:30AM Feb 14, 2016Observed: 37.07 ft at 3:45AM Feb 14, 2016Observed: 37.06 ft at 4:00AM Feb 14, 2016Observed: 37.07 ft at 4:15AM Feb 14, 2016Observed: 37.07 ft at 4:30AM Feb 14, 2016Observed: 37.06 ft at 4:45AM Feb 14, 2016Observed: 37.06 ft at 5:00AM Feb 14, 2016Observed: 37.08 ft at 5:15AM Feb 14, 2016Observed: 37.08 ft at 5:30AM Feb 14, 2016Observed: 37.08 ft at 5:45AM Feb 14, 2016Observed: 37.09 ft at 6:00AM Feb 14, 2016Observed: 37.09 ft at 6:15AM Feb 14, 2016Observed: 37.1 ft at 6:30AM Feb 14, 2016Observed: 37.09 ft at 6:45AM Feb 14, 2016Observed: 37.09 ft at 7:00AM Feb 14, 2016Observed: 37.11 ft at 7:15AM Feb 14, 2016Observed: 37.11 ft at 7:30AM Feb 14, 2016Observed: 37.1 ft at 7:45AM Feb 14, 2016Observed: 37.1 ft at 8:00AM Feb 14, 2016Observed: 37.11 ft at 8:15AM Feb 14, 2016Highest Observation: 37.12 ft at 8:30AM Feb 14, 2016Observed: 37.11 ft at 8:45AM Feb 14, 2016Observed: 37.11 ft at 9:00AM Feb 14, 2016Highest Observation: 37.12 ft at 9:15AM Feb 14, 2016Highest Observation: 37.12 ft at 9:30AM Feb 14, 2016Forecast: 37.47 ft 4:00PM Feb 14, 2016Forecast: 37.9 ft 10:00PM Feb 14, 2016Forecast: 38.32 ft 4:00AM Feb 15, 2016Forecast: 38.7 ft 10:00AM Feb 15, 2016Highest Forecast: 38.85 ft 4:00PM Feb 15, 2016Forecast: 38.79 ft 10:00PM Feb 15, 2016Forecast: 38.66 ft 4:00AM Feb 16, 2016Forecast: 38.55 ft 10:00AM Feb 16, 2016Forecast: 38.51 ft 4:00PM Feb 16, 2016Forecast: 38.51 ft 10:00PM Feb 16, 2016Forecast: 38.46 ft 4:00AM Feb 17, 2016Forecast: 38.35 ft 10:00AM Feb 17, 2016Forecast: 38.06 ft 4:00PM Feb 17, 2016Forecast: 37.64 ft 10:00PM Feb 17, 2016Forecast: 37.47 ft 4:00AM Feb 18, 2016Forecast: 37.52 ft 10:00AM Feb 18, 2016Forecast: 37.57 ft 4:00PM Feb 18, 2016Forecast: 37.59 ft 10:00PM Feb 18, 2016Forecast: 37.59 ft 4:00AM Feb 19, 2016Forecast: 37.57 ft 10:00AM Feb 19, 2016USGS--Water Resources of the United StatesCASW1(plotting HGIRG) Graph Created (10:47AM Feb 14, 2016)ObservedForecast (issued 9:45AM Feb 14)Latest observed value: 37.12 ft at 9:30 AM PST 14-Feb-2016. Flood Stage is 48 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PST)
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) 52.45 ft on 12/09/2015
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 52.45 ft on 12/09/2015
(2) 54.70 ft on 01/08/2009
(3) 49.78 ft on 11/07/2006
(4) 47.58 ft on 02/01/2003
(5) 46.59 ft on 11/26/1998
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, expect widespread and major flooding of homes and property just upstream and downstream of Castle Rock. Impacts include major flooding of the fairgrounds area west of Castle Rock, numerous road closures, and 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
National Weather Service
Portland Weather Forecast Office
5241 NE 122nd Avenue
Portland, OR 97230-1089
(503) 261-9246
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Page last modified: 13-Aug-2015 1:54 AM
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