Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Bookmark and Share

  
 

Over 200 USGS real-time streamgages used to support NWS river forecasts and warnings are at risk of being discontinued. Click here for more information from the USGS...
Weather Forecast Office Seattle, WA Northwest River Forecast Center
Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Chehalis River at Porter Stage (ft)Flow (kcfs)Observed: 5.35 ft at 3:45PM Jun 15, 2013Highest Observation: 5.36 ft at 4:00PM Jun 15, 2013Highest Observation: 5.36 ft at 4:15PM Jun 15, 2013Observed: 5.35 ft at 4:30PM Jun 15, 2013Highest Observation: 5.36 ft at 4:45PM Jun 15, 2013Observed: 5.35 ft at 5:00PM Jun 15, 2013Observed: 5.35 ft at 5:15PM Jun 15, 2013Observed: 5.35 ft at 5:30PM Jun 15, 2013Observed: 5.35 ft at 5:45PM Jun 15, 2013Observed: 5.35 ft at 6:00PM Jun 15, 2013Observed: 5.35 ft at 6:15PM Jun 15, 2013Observed: 5.35 ft at 6:30PM Jun 15, 2013Observed: 5.35 ft at 6:45PM Jun 15, 2013Observed: 5.34 ft at 7:00PM Jun 15, 2013Observed: 5.34 ft at 7:15PM Jun 15, 2013Observed: 5.34 ft at 7:30PM Jun 15, 2013Observed: 5.34 ft at 7:45PM Jun 15, 2013Observed: 5.33 ft at 8:00PM Jun 15, 2013Observed: 5.34 ft at 8:15PM Jun 15, 2013Observed: 5.32 ft at 8:30PM Jun 15, 2013Observed: 5.32 ft at 8:45PM Jun 15, 2013Observed: 5.32 ft at 9:00PM Jun 15, 2013Observed: 5.32 ft at 9:15PM Jun 15, 2013Observed: 5.32 ft at 9:30PM Jun 15, 2013Observed: 5.32 ft at 9:45PM Jun 15, 2013Observed: 5.32 ft at 10:00PM Jun 15, 2013Observed: 5.31 ft at 10:15PM Jun 15, 2013Observed: 5.31 ft at 10:30PM Jun 15, 2013Observed: 5.31 ft at 10:45PM Jun 15, 2013Observed: 5.31 ft at 11:00PM Jun 15, 2013Observed: 5.3 ft at 11:15PM Jun 15, 2013Observed: 5.3 ft at 11:30PM Jun 15, 2013Observed: 5.3 ft at 11:45PM Jun 15, 2013Observed: 5.3 ft at 12:00AM Jun 16, 2013Observed: 5.3 ft at 12:15AM Jun 16, 2013Observed: 5.29 ft at 12:30AM Jun 16, 2013Observed: 5.29 ft at 12:45AM Jun 16, 2013Observed: 5.29 ft at 1:00AM Jun 16, 2013Observed: 5.29 ft at 1:15AM Jun 16, 2013Observed: 5.29 ft at 1:30AM Jun 16, 2013Observed: 5.28 ft at 1:45AM Jun 16, 2013Observed: 5.29 ft at 2:00AM Jun 16, 2013Observed: 5.28 ft at 2:15AM Jun 16, 2013Observed: 5.28 ft at 2:30AM Jun 16, 2013Observed: 5.28 ft at 2:45AM Jun 16, 2013Observed: 5.28 ft at 3:00AM Jun 16, 2013Observed: 5.27 ft at 3:15AM Jun 16, 2013Observed: 5.28 ft at 3:30AM Jun 16, 2013Observed: 5.27 ft at 3:45AM Jun 16, 2013Observed: 5.27 ft at 4:00AM Jun 16, 2013Observed: 5.27 ft at 4:15AM Jun 16, 2013Observed: 5.28 ft at 4:30AM Jun 16, 2013Observed: 5.27 ft at 4:45AM Jun 16, 2013Observed: 5.27 ft at 5:00AM Jun 16, 2013Observed: 5.26 ft at 5:15AM Jun 16, 2013Observed: 5.27 ft at 5:30AM Jun 16, 2013Observed: 5.27 ft at 5:45AM Jun 16, 2013Observed: 5.27 ft at 6:00AM Jun 16, 2013Observed: 5.27 ft at 6:15AM Jun 16, 2013Observed: 5.27 ft at 6:30AM Jun 16, 2013Observed: 5.26 ft at 6:45AM Jun 16, 2013Observed: 5.27 ft at 7:00AM Jun 16, 2013Observed: 5.26 ft at 7:15AM Jun 16, 2013Observed: 5.27 ft at 7:30AM Jun 16, 2013Observed: 5.27 ft at 7:45AM Jun 16, 2013Observed: 5.26 ft at 8:00AM Jun 16, 2013Observed: 5.26 ft at 8:15AM Jun 16, 2013Observed: 5.26 ft at 8:30AM Jun 16, 2013Observed: 5.26 ft at 8:45AM Jun 16, 2013Observed: 5.26 ft at 9:00AM Jun 16, 2013Observed: 5.26 ft at 9:15AM Jun 16, 2013Observed: 5.26 ft at 9:30AM Jun 16, 2013Observed: 5.26 ft at 9:45AM Jun 16, 2013Observed: 5.25 ft at 10:00AM Jun 16, 2013Observed: 5.26 ft at 10:15AM Jun 16, 2013Observed: 5.26 ft at 10:30AM Jun 16, 2013Observed: 5.25 ft at 10:45AM Jun 16, 2013Observed: 5.25 ft at 11:00AM Jun 16, 2013Observed: 5.26 ft at 11:15AM Jun 16, 2013Observed: 5.25 ft at 11:30AM Jun 16, 2013Observed: 5.25 ft at 11:45AM Jun 16, 2013Observed: 5.33 ft at 12:00PM Jun 16, 2013Observed: 5.26 ft at 12:15PM Jun 16, 2013Observed: 5.25 ft at 12:30PM Jun 16, 2013Observed: 5.26 ft at 12:45PM Jun 16, 2013Observed: 5.26 ft at 1:00PM Jun 16, 2013Observed: 5.25 ft at 1:15PM Jun 16, 2013Observed: 5.26 ft at 1:30PM Jun 16, 2013Observed: 5.28 ft at 1:45PM Jun 16, 2013Observed: 5.24 ft at 2:00PM Jun 16, 2013Observed: 5.24 ft at 2:15PM Jun 16, 2013Highest Observation: 5.36 ft at 2:30PM Jun 16, 2013Observed: 5.24 ft at 2:45PM Jun 16, 2013Highest Observation: 5.36 ft at 3:00PM Jun 16, 2013Observed: 5.34 ft at 3:15PM Jun 16, 2013Observed: 5.35 ft at 3:30PM Jun 16, 2013Observed: 5.24 ft at 3:45PM Jun 16, 2013Observed: 5.35 ft at 4:00PM Jun 16, 2013Observed: 5.33 ft at 4:15PM Jun 16, 2013Observed: 5.27 ft at 4:30PM Jun 16, 2013Observed: 5.23 ft at 4:45PM Jun 16, 2013Observed: 5.35 ft at 5:00PM Jun 16, 2013Observed: 5.29 ft at 5:15PM Jun 16, 2013Observed: 5.35 ft at 5:30PM Jun 16, 2013Observed: 5.24 ft at 5:45PM Jun 16, 2013Observed: 5.35 ft at 6:00PM Jun 16, 2013Observed: 5.29 ft at 6:15PM Jun 16, 2013Observed: 5.34 ft at 6:30PM Jun 16, 2013Observed: 5.34 ft at 6:45PM Jun 16, 2013Observed: 5.24 ft at 7:00PM Jun 16, 2013Observed: 5.24 ft at 7:15PM Jun 16, 2013Observed: 5.29 ft at 7:30PM Jun 16, 2013Observed: 5.26 ft at 7:45PM Jun 16, 2013Observed: 5.31 ft at 8:00PM Jun 16, 2013Observed: 5.26 ft at 8:15PM Jun 16, 2013Observed: 5.17 ft at 8:30PM Jun 16, 2013Observed: 5.18 ft at 8:45PM Jun 16, 2013Observed: 5.17 ft at 9:00PM Jun 16, 2013Observed: 5.17 ft at 9:15PM Jun 16, 2013Observed: 5.17 ft at 9:30PM Jun 16, 2013Observed: 5.17 ft at 9:45PM Jun 16, 2013Observed: 5.17 ft at 10:00PM Jun 16, 2013Observed: 5.17 ft at 10:15PM Jun 16, 2013Observed: 5.17 ft at 10:30PM Jun 16, 2013Observed: 5.17 ft at 10:45PM Jun 16, 2013Observed: 5.17 ft at 11:00PM Jun 16, 2013Observed: 5.18 ft at 11:15PM Jun 16, 2013Observed: 5.17 ft at 11:30PM Jun 16, 2013Observed: 5.17 ft at 11:45PM Jun 16, 2013Observed: 5.17 ft at 12:00AM Jun 17, 2013Observed: 5.17 ft at 12:15AM Jun 17, 2013Observed: 5.17 ft at 12:30AM Jun 17, 2013Observed: 5.17 ft at 12:45AM Jun 17, 2013Observed: 5.17 ft at 1:00AM Jun 17, 2013Observed: 5.18 ft at 1:15AM Jun 17, 2013Observed: 5.17 ft at 1:30AM Jun 17, 2013Observed: 5.17 ft at 1:45AM Jun 17, 2013Observed: 5.17 ft at 2:00AM Jun 17, 2013Observed: 5.17 ft at 2:15AM Jun 17, 2013Observed: 5.17 ft at 2:30AM Jun 17, 2013Observed: 5.17 ft at 2:45AM Jun 17, 2013Observed: 5.17 ft at 3:00AM Jun 17, 2013Observed: 5.17 ft at 3:15AM Jun 17, 2013Observed: 5.17 ft at 3:30AM Jun 17, 2013Observed: 5.17 ft at 3:45AM Jun 17, 2013Observed: 5.18 ft at 4:00AM Jun 17, 2013Observed: 5.17 ft at 4:15AM Jun 17, 2013Observed: 5.17 ft at 4:30AM Jun 17, 2013Observed: 5.17 ft at 4:45AM Jun 17, 2013Observed: 5.17 ft at 5:00AM Jun 17, 2013Observed: 5.17 ft at 5:15AM Jun 17, 2013Observed: 5.17 ft at 5:30AM Jun 17, 2013Observed: 5.17 ft at 5:45AM Jun 17, 2013Observed: 5.18 ft at 6:00AM Jun 17, 2013Observed: 5.17 ft at 6:15AM Jun 17, 2013Observed: 5.17 ft at 6:30AM Jun 17, 2013Observed: 5.17 ft at 6:45AM Jun 17, 2013Observed: 5.17 ft at 7:00AM Jun 17, 2013Observed: 5.17 ft at 7:15AM Jun 17, 2013Observed: 5.17 ft at 7:30AM Jun 17, 2013Observed: 5.17 ft at 7:45AM Jun 17, 2013Observed: 5.17 ft at 8:00AM Jun 17, 2013Observed: 5.17 ft at 8:15AM Jun 17, 2013Observed: 5.17 ft at 8:30AM Jun 17, 2013Observed: 5.17 ft at 8:45AM Jun 17, 2013Observed: 5.17 ft at 9:00AM Jun 17, 2013Observed: 5.17 ft at 9:15AM Jun 17, 2013Observed: 5.17 ft at 9:30AM Jun 17, 2013Observed: 5.17 ft at 9:45AM Jun 17, 2013Observed: 5.17 ft at 10:00AM Jun 17, 2013Observed: 5.17 ft at 10:15AM Jun 17, 2013Observed: 5.17 ft at 10:30AM Jun 17, 2013Observed: 5.17 ft at 10:45AM Jun 17, 2013Observed: 5.17 ft at 11:00AM Jun 17, 2013Observed: 5.17 ft at 11:15AM Jun 17, 2013Observed: 5.17 ft at 11:30AM Jun 17, 2013Observed: 5.17 ft at 11:45AM Jun 17, 2013Observed: 5.17 ft at 12:00PM Jun 17, 2013Observed: 5.17 ft at 12:15PM Jun 17, 2013Observed: 5.17 ft at 12:30PM Jun 17, 2013Observed: 5.18 ft at 12:45PM Jun 17, 2013Observed: 5.17 ft at 1:00PM Jun 17, 2013Observed: 5.17 ft at 1:15PM Jun 17, 2013Observed: 5.17 ft at 1:30PM Jun 17, 2013Observed: 5.17 ft at 1:45PM Jun 17, 2013Observed: 5.17 ft at 2:00PM Jun 17, 2013Observed: 5.17 ft at 2:15PM Jun 17, 2013Observed: 5.17 ft at 2:30PM Jun 17, 2013Observed: 5.17 ft at 2:45PM Jun 17, 2013Observed: 5.17 ft at 3:00PM Jun 17, 2013Observed: 5.17 ft at 3:15PM Jun 17, 2013Observed: 5.17 ft at 3:30PM Jun 17, 2013Observed: 5.17 ft at 3:45PM Jun 17, 2013Observed: 5.17 ft at 4:00PM Jun 17, 2013Observed: 5.17 ft at 4:15PM Jun 17, 2013Observed: 5.17 ft at 4:30PM Jun 17, 2013Observed: 5.17 ft at 4:45PM Jun 17, 2013Observed: 5.17 ft at 5:00PM Jun 17, 2013Observed: 5.17 ft at 5:15PM Jun 17, 2013Observed: 5.17 ft at 5:30PM Jun 17, 2013Observed: 5.17 ft at 5:45PM Jun 17, 2013Observed: 5.17 ft at 6:00PM Jun 17, 2013Observed: 5.17 ft at 6:15PM Jun 17, 2013Observed: 5.17 ft at 6:30PM Jun 17, 2013Observed: 5.17 ft at 6:45PM Jun 17, 2013Observed: 5.17 ft at 7:00PM Jun 17, 2013Observed: 5.17 ft at 7:15PM Jun 17, 2013Observed: 5.17 ft at 7:30PM Jun 17, 2013Observed: 5.17 ft at 7:45PM Jun 17, 2013Observed: 5.17 ft at 8:00PM Jun 17, 2013Observed: 5.17 ft at 8:15PM Jun 17, 2013Observed: 5.17 ft at 8:30PM Jun 17, 2013Observed: 5.17 ft at 8:45PM Jun 17, 2013Observed: 5.17 ft at 9:00PM Jun 17, 2013Observed: 5.17 ft at 9:15PM Jun 17, 2013Observed: 5.17 ft at 9:30PM Jun 17, 2013Observed: 5.17 ft at 9:45PM Jun 17, 2013Observed: 5.17 ft at 10:00PM Jun 17, 2013Observed: 5.17 ft at 10:15PM Jun 17, 2013Observed: 5.17 ft at 10:30PM Jun 17, 2013Observed: 5.17 ft at 10:45PM Jun 17, 2013Observed: 5.17 ft at 11:00PM Jun 17, 2013Observed: 5.17 ft at 11:15PM Jun 17, 2013Observed: 5.17 ft at 11:30PM Jun 17, 2013Observed: 5.17 ft at 11:45PM Jun 17, 2013Observed: 5.17 ft at 12:00AM Jun 18, 2013Observed: 5.17 ft at 12:15AM Jun 18, 2013Observed: 5.17 ft at 12:30AM Jun 18, 2013Observed: 5.18 ft at 12:45AM Jun 18, 2013Observed: 5.17 ft at 1:00AM Jun 18, 2013Observed: 5.17 ft at 1:15AM Jun 18, 2013Observed: 5.17 ft at 1:30AM Jun 18, 2013Observed: 5.17 ft at 1:45AM Jun 18, 2013Observed: 5.17 ft at 2:00AM Jun 18, 2013Observed: 5.17 ft at 2:15AM Jun 18, 2013Observed: 5.17 ft at 2:30AM Jun 18, 2013Observed: 5.17 ft at 2:45AM Jun 18, 2013Observed: 5.17 ft at 3:00AM Jun 18, 2013Observed: 5.17 ft at 3:15AM Jun 18, 2013Observed: 5.17 ft at 3:30AM Jun 18, 2013Observed: 5.17 ft at 3:45AM Jun 18, 2013Observed: 5.17 ft at 4:00AM Jun 18, 2013Observed: 5.17 ft at 4:15AM Jun 18, 2013Observed: 5.17 ft at 4:30AM Jun 18, 2013Observed: 5.17 ft at 4:45AM Jun 18, 2013Observed: 5.17 ft at 5:00AM Jun 18, 2013Observed: 5.17 ft at 5:15AM Jun 18, 2013Observed: 5.17 ft at 5:30AM Jun 18, 2013Observed: 5.17 ft at 5:45AM Jun 18, 2013Observed: 5.17 ft at 6:00AM Jun 18, 2013Observed: 5.18 ft at 6:15AM Jun 18, 2013Observed: 5.17 ft at 6:30AM Jun 18, 2013Observed: 5.17 ft at 6:45AM Jun 18, 2013Observed: 5.17 ft at 7:00AM Jun 18, 2013Observed: 5.17 ft at 7:15AM Jun 18, 2013Observed: 5.17 ft at 7:30AM Jun 18, 2013Observed: 5.17 ft at 7:45AM Jun 18, 2013Observed: 5.17 ft at 8:00AM Jun 18, 2013Observed: 5.17 ft at 8:15AM Jun 18, 2013Observed: 5.17 ft at 8:30AM Jun 18, 2013Observed: 5.17 ft at 8:45AM Jun 18, 2013Observed: 5.18 ft at 9:00AM Jun 18, 2013Observed: 5.17 ft at 9:15AM Jun 18, 2013Observed: 5.17 ft at 9:30AM Jun 18, 2013Observed: 5.17 ft at 9:45AM Jun 18, 2013Observed: 5.17 ft at 10:00AM Jun 18, 2013Observed: 5.17 ft at 10:15AM Jun 18, 2013Observed: 5.17 ft at 10:30AM Jun 18, 2013Observed: 5.17 ft at 10:45AM Jun 18, 2013Observed: 5.17 ft at 11:00AM Jun 18, 2013Observed: 5.17 ft at 11:15AM Jun 18, 2013Observed: 5.17 ft at 11:30AM Jun 18, 2013Observed: 5.17 ft at 11:45AM Jun 18, 2013Observed: 5.17 ft at 12:00PM Jun 18, 2013Observed: 5.17 ft at 12:15PM Jun 18, 2013Observed: 5.17 ft at 12:30PM Jun 18, 2013Observed: 5.17 ft at 12:45PM Jun 18, 2013Observed: 5.17 ft at 1:00PM Jun 18, 2013Observed: 5.17 ft at 1:15PM Jun 18, 2013Observed: 5.17 ft at 1:30PM Jun 18, 2013Observed: 5.17 ft at 1:45PM Jun 18, 2013Observed: 5.17 ft at 2:00PM Jun 18, 2013Observed: 5.17 ft at 2:15PM Jun 18, 2013Observed: 5.17 ft at 2:30PM Jun 18, 2013Observed: 5.17 ft at 2:45PM Jun 18, 2013Forecast: 5.02 ft 5:00PM Jun 18, 2013Forecast: 5.02 ft 11:00PM Jun 18, 2013Forecast: 5.02 ft 5:00AM Jun 19, 2013Forecast: 5.02 ft 11:00AM Jun 19, 2013Forecast: 5.02 ft 5:00PM Jun 19, 2013Forecast: 5.03 ft 11:00PM Jun 19, 2013Forecast: 5.03 ft 5:00AM Jun 20, 2013Forecast: 5.03 ft 11:00AM Jun 20, 2013Forecast: 5.03 ft 5:00PM Jun 20, 2013Highest Forecast: 5.04 ft 11:00PM Jun 20, 2013Forecast: 5.03 ft 5:00AM Jun 21, 2013Forecast: 5.03 ft 11:00AM Jun 21, 2013USGS--Water Resources of the United StatesCRPW1(plotting HGIRG) Graph Created (3:43PM Jun 18, 2013)ObservedForecast (issued 10:29AM Jun 18)Latest observed value: 5.17 ft at 2:45 PM PDT 18-Jun-2013. Flood Stage is 21 ft
Printable Image
About this graph
Tabular Data
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Chehalis River at Porter are issued routinely year-round.
Return to Area Map
Upstream Gauge - near Grand Mound Upstream Gauge
Flood Categories (in feet)
Major Flood Stage:25
Moderate Flood Stage:23
Flood Stage:21
Action Stage:0

Historical Crests
(1) 26.05 ft on 12/05/2007
(2) 25.22 ft on 02/09/1996
(3) 24.74 ft on 01/09/2009
(4) 24.52 ft on 01/11/1990
(5) 23.88 ft on 01/22/1972
Show More Historical Crests

Low Water Records
(1) 2.20 ft on 10/17/1952
Legend
Gauge Location
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
25 the Chehalis River in Grays Harbor will cause major near record flooding from Oakville downstream to Grays Harbor. Deep and swift flood waters will inundate numerous farms and roads...including SR 12. High tidal levels at Aberdeen will worsen flooding along the lower reaches. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
23 feet...the Chehalis River in Grays Harbor will flood numerous farms and roads including SR 12. High tidal levels at Aberdeen will worsen flooding along the lower reaches.
22 the Chehalis River in Grays Harbor will flood pasture lands and many roads...including SR 12 between Oakville and Rochester. High tidal levels at Aberdeen will worsen flooding along the lower reaches.
21 the Chehalis River in Grays Harbor will flood low pasture lands and some roads. High tidal levels at Aberdeen will worsen flooding along the lower reaches.
19 the Chehalis River in Grays Harbor County will locally spill over its banks with shallow water on several roads.
About This Location Collapse

Latitude: 46.939444° N, Longitude: 123.313056° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 21 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 23.64 ft 44.64 ft  

Other Data Sources:
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
National Weather Service
Seattle Weather Forecast Office
7600 Sandpoint Way NE
Seattle, WA 98115-6349
(206) 526-6087
Ask Questions/Webmaster
Page last modified: 13-Mar-2013 6:25 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities