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Hydrograph River at a Glance Download
Cowlitz River below Mayfield Dam River Discharge (kcfs)Stage (ft)Observed: 5.14 kcfs at 2:00PM May 05, 2024Observed: 5.14 kcfs at 2:15PM May 05, 2024Observed: 5.14 kcfs at 2:30PM May 05, 2024Observed: 5.14 kcfs at 2:45PM May 05, 2024Observed: 5.12 kcfs at 3:00PM May 05, 2024Observed: 5.12 kcfs at 3:15PM May 05, 2024Observed: 5.12 kcfs at 3:30PM May 05, 2024Observed: 5.14 kcfs at 3:45PM May 05, 2024Observed: 5.14 kcfs at 4:00PM May 05, 2024Observed: 5.14 kcfs at 4:15PM May 05, 2024Observed: 5.14 kcfs at 4:30PM May 05, 2024Observed: 5.14 kcfs at 4:45PM May 05, 2024Observed: 5.12 kcfs at 5:00PM May 05, 2024Observed: 5.14 kcfs at 5:15PM May 05, 2024Observed: 5.14 kcfs at 5:30PM May 05, 2024Observed: 5.14 kcfs at 5:45PM May 05, 2024Observed: 5.14 kcfs at 6:00PM May 05, 2024Observed: 5.14 kcfs at 6:15PM May 05, 2024Observed: 5.12 kcfs at 6:30PM May 05, 2024Observed: 5.14 kcfs at 6:45PM May 05, 2024Observed: 5.14 kcfs at 7:00PM May 05, 2024Observed: 5.12 kcfs at 7:15PM May 05, 2024Observed: 5.12 kcfs at 7:30PM May 05, 2024Observed: 5.14 kcfs at 7:45PM May 05, 2024Observed: 5.16 kcfs at 8:00PM May 05, 2024Observed: 5.16 kcfs at 8:15PM May 05, 2024Observed: 5.14 kcfs at 8:30PM May 05, 2024Observed: 5.14 kcfs at 8:45PM May 05, 2024Observed: 5.14 kcfs at 9:00PM May 05, 2024Observed: 5.16 kcfs at 9:15PM May 05, 2024Observed: 5.14 kcfs at 9:30PM May 05, 2024Observed: 5.14 kcfs at 9:45PM May 05, 2024Observed: 5.14 kcfs at 10:00PM May 05, 2024Observed: 5.14 kcfs at 10:15PM May 05, 2024Observed: 5.12 kcfs at 10:30PM May 05, 2024Observed: 5.14 kcfs at 10:45PM May 05, 2024Observed: 5.14 kcfs at 11:00PM May 05, 2024Observed: 5.14 kcfs at 11:15PM May 05, 2024Observed: 5.12 kcfs at 11:30PM May 05, 2024Observed: 5.12 kcfs at 11:45PM May 05, 2024Observed: 5.12 kcfs at 12:00AM May 06, 2024Observed: 5.12 kcfs at 12:15AM May 06, 2024Observed: 5.12 kcfs at 12:30AM May 06, 2024Observed: 5.12 kcfs at 12:45AM May 06, 2024Observed: 5.12 kcfs at 1:00AM May 06, 2024Observed: 5.14 kcfs at 1:15AM May 06, 2024Observed: 5.14 kcfs at 1:30AM May 06, 2024Observed: 5.14 kcfs at 1:45AM May 06, 2024Observed: 5.12 kcfs at 2:00AM May 06, 2024Observed: 5.14 kcfs at 2:15AM May 06, 2024Observed: 5.14 kcfs at 2:30AM May 06, 2024Observed: 5.16 kcfs at 2:45AM May 06, 2024Observed: 5.14 kcfs at 3:00AM May 06, 2024Observed: 5.14 kcfs at 3:15AM May 06, 2024Observed: 5.14 kcfs at 3:30AM May 06, 2024Observed: 5.12 kcfs at 3:45AM May 06, 2024Observed: 5.14 kcfs at 4:00AM May 06, 2024Observed: 5.16 kcfs at 4:15AM May 06, 2024Observed: 5.14 kcfs at 4:30AM May 06, 2024Observed: 5.14 kcfs at 4:45AM May 06, 2024Observed: 5.16 kcfs at 5:00AM May 06, 2024Observed: 5.18 kcfs at 5:15AM May 06, 2024Observed: 5.16 kcfs at 5:30AM May 06, 2024Observed: 5.16 kcfs at 5:45AM May 06, 2024Observed: 5.16 kcfs at 6:00AM May 06, 2024Observed: 5.18 kcfs at 6:15AM May 06, 2024Observed: 5.16 kcfs at 6:30AM May 06, 2024Observed: 5.16 kcfs at 6:45AM May 06, 2024Observed: 5.16 kcfs at 7:00AM May 06, 2024Observed: 5.18 kcfs at 7:15AM May 06, 2024Observed: 5.16 kcfs at 7:30AM May 06, 2024Observed: 5.16 kcfs at 7:45AM May 06, 2024Observed: 5.16 kcfs at 8:00AM May 06, 2024Observed: 5.14 kcfs at 8:15AM May 06, 2024Observed: 5.16 kcfs at 8:30AM May 06, 2024Observed: 5.16 kcfs at 8:45AM May 06, 2024Observed: 5.16 kcfs at 9:00AM May 06, 2024Observed: 5.16 kcfs at 9:15AM May 06, 2024Observed: 5.16 kcfs at 9:30AM May 06, 2024Observed: 5.16 kcfs at 9:45AM May 06, 2024Observed: 5.16 kcfs at 10:00AM May 06, 2024Observed: 5.16 kcfs at 10:15AM May 06, 2024Observed: 5.14 kcfs at 10:30AM May 06, 2024Observed: 5.16 kcfs at 10:45AM May 06, 2024Observed: 5.14 kcfs at 11:00AM May 06, 2024Observed: 5.16 kcfs at 11:15AM May 06, 2024Observed: 5.14 kcfs at 11:30AM May 06, 2024Observed: 5.14 kcfs at 11:45AM May 06, 2024Observed: 5.16 kcfs at 12:00PM May 06, 2024Observed: 5.16 kcfs at 12:15PM May 06, 2024Observed: 5.14 kcfs at 12:30PM May 06, 2024Observed: 5.14 kcfs at 12:45PM May 06, 2024Observed: 5.12 kcfs at 1:00PM May 06, 2024Observed: 5.14 kcfs at 1:15PM May 06, 2024Observed: 5.16 kcfs at 1:30PM May 06, 2024Observed: 5.16 kcfs at 1:45PM May 06, 2024Observed: 5.16 kcfs at 2:00PM May 06, 2024Observed: 5.16 kcfs at 2:15PM May 06, 2024Observed: 5.14 kcfs at 2:30PM May 06, 2024Observed: 5.14 kcfs at 2:45PM May 06, 2024Observed: 5.16 kcfs at 3:00PM May 06, 2024Observed: 5.14 kcfs at 3:15PM May 06, 2024Observed: 5.16 kcfs at 3:30PM May 06, 2024Observed: 5.16 kcfs at 3:45PM May 06, 2024Observed: 5.16 kcfs at 4:00PM May 06, 2024Observed: 5.16 kcfs at 4:15PM May 06, 2024Observed: 5.16 kcfs at 4:30PM May 06, 2024Observed: 5.14 kcfs at 4:45PM May 06, 2024Observed: 5.14 kcfs at 5:00PM May 06, 2024Observed: 5.16 kcfs at 5:15PM May 06, 2024Observed: 5.16 kcfs at 5:30PM May 06, 2024Observed: 5.16 kcfs at 5:45PM May 06, 2024Observed: 5.16 kcfs at 6:00PM May 06, 2024Observed: 5.14 kcfs at 6:15PM May 06, 2024Observed: 5.16 kcfs at 6:30PM May 06, 2024Observed: 5.18 kcfs at 6:45PM May 06, 2024Observed: 5.16 kcfs at 7:00PM May 06, 2024Observed: 5.14 kcfs at 7:15PM May 06, 2024Observed: 5.14 kcfs at 7:30PM May 06, 2024Observed: 5.14 kcfs at 7:45PM May 06, 2024Observed: 5.14 kcfs at 8:00PM May 06, 2024Observed: 5.14 kcfs at 8:15PM May 06, 2024Observed: 5.14 kcfs at 8:30PM May 06, 2024Observed: 5.14 kcfs at 8:45PM May 06, 2024Observed: 5.14 kcfs at 9:00PM May 06, 2024Observed: 5.14 kcfs at 9:15PM May 06, 2024Observed: 5.14 kcfs at 9:30PM May 06, 2024Observed: 5.12 kcfs at 9:45PM May 06, 2024Observed: 5.12 kcfs at 10:00PM May 06, 2024Observed: 5.14 kcfs at 10:15PM May 06, 2024Observed: 5.12 kcfs at 10:30PM May 06, 2024Observed: 5.12 kcfs at 10:45PM May 06, 2024Observed: 5.14 kcfs at 11:00PM May 06, 2024Observed: 5.14 kcfs at 11:15PM May 06, 2024Observed: 5.12 kcfs at 11:30PM May 06, 2024Observed: 5.12 kcfs at 11:45PM May 06, 2024Observed: 5.12 kcfs at 12:00AM May 07, 2024Observed: 5.14 kcfs at 12:15AM May 07, 2024Observed: 5.12 kcfs at 12:30AM May 07, 2024Observed: 5.14 kcfs at 12:45AM May 07, 2024Observed: 5.14 kcfs at 1:00AM May 07, 2024Observed: 5.14 kcfs at 1:15AM May 07, 2024Observed: 5.12 kcfs at 1:30AM May 07, 2024Observed: 5.1 kcfs at 1:45AM May 07, 2024Observed: 5.1 kcfs at 2:00AM May 07, 2024Observed: 5.12 kcfs at 2:15AM May 07, 2024Observed: 5.14 kcfs at 2:30AM May 07, 2024Observed: 5.12 kcfs at 2:45AM May 07, 2024Observed: 5.12 kcfs at 3:00AM May 07, 2024Observed: 5.12 kcfs at 3:15AM May 07, 2024Observed: 5.12 kcfs at 3:30AM May 07, 2024Observed: 5.12 kcfs at 3:45AM May 07, 2024Observed: 5.16 kcfs at 4:00AM May 07, 2024Observed: 5.14 kcfs at 4:15AM May 07, 2024Observed: 5.14 kcfs at 4:30AM May 07, 2024Observed: 5.14 kcfs at 4:45AM May 07, 2024Observed: 5.14 kcfs at 5:00AM May 07, 2024Observed: 5.14 kcfs at 5:15AM May 07, 2024Observed: 5.14 kcfs at 5:30AM May 07, 2024Observed: 5.14 kcfs at 5:45AM May 07, 2024Observed: 5.14 kcfs at 6:00AM May 07, 2024Observed: 5.14 kcfs at 6:15AM May 07, 2024Observed: 5.14 kcfs at 6:30AM May 07, 2024Observed: 5.12 kcfs at 6:45AM May 07, 2024Observed: 5.14 kcfs at 7:00AM May 07, 2024Observed: 5.12 kcfs at 7:15AM May 07, 2024Observed: 5.14 kcfs at 7:30AM May 07, 2024Observed: 5.12 kcfs at 7:45AM May 07, 2024Observed: 5.12 kcfs at 8:00AM May 07, 2024Observed: 5.12 kcfs at 8:15AM May 07, 2024Observed: 5.14 kcfs at 8:30AM May 07, 2024Observed: 5.12 kcfs at 8:45AM May 07, 2024Observed: 5.14 kcfs at 9:00AM May 07, 2024Observed: 5.12 kcfs at 9:15AM May 07, 2024Observed: 5.14 kcfs at 9:30AM May 07, 2024Observed: 5.12 kcfs at 9:45AM May 07, 2024Observed: 5.12 kcfs at 10:00AM May 07, 2024Observed: 5.12 kcfs at 10:15AM May 07, 2024Observed: 5.12 kcfs at 10:30AM May 07, 2024Observed: 5.12 kcfs at 10:45AM May 07, 2024Observed: 5.1 kcfs at 11:00AM May 07, 2024Observed: 5.12 kcfs at 11:15AM May 07, 2024Observed: 5.12 kcfs at 11:30AM May 07, 2024Observed: 5.12 kcfs at 11:45AM May 07, 2024Observed: 5.12 kcfs at 12:00PM May 07, 2024Observed: 5.12 kcfs at 12:15PM May 07, 2024Observed: 5.12 kcfs at 12:30PM May 07, 2024Observed: 5.12 kcfs at 12:45PM May 07, 2024Observed: 5.12 kcfs at 1:00PM May 07, 2024Observed: 5.12 kcfs at 1:15PM May 07, 2024Observed: 5.12 kcfs at 1:30PM May 07, 2024Observed: 5.12 kcfs at 1:45PM May 07, 2024Observed: 5.12 kcfs at 2:00PM May 07, 2024Observed: 5.1 kcfs at 2:15PM May 07, 2024Observed: 5.12 kcfs at 2:30PM May 07, 2024Observed: 5.12 kcfs at 2:45PM May 07, 2024Observed: 5.12 kcfs at 3:00PM May 07, 2024Observed: 5.12 kcfs at 3:15PM May 07, 2024Observed: 5.1 kcfs at 3:30PM May 07, 2024Observed: 5.1 kcfs at 3:45PM May 07, 2024Observed: 5.1 kcfs at 4:00PM May 07, 2024Observed: 5.1 kcfs at 4:15PM May 07, 2024Observed: 5.12 kcfs at 4:30PM May 07, 2024Observed: 5.12 kcfs at 4:45PM May 07, 2024Observed: 5.12 kcfs at 5:00PM May 07, 2024Observed: 5.12 kcfs at 5:15PM May 07, 2024Observed: 5.12 kcfs at 5:30PM May 07, 2024Observed: 5.12 kcfs at 5:45PM May 07, 2024Observed: 5.1 kcfs at 6:00PM May 07, 2024Observed: 5.1 kcfs at 6:15PM May 07, 2024Observed: 5.1 kcfs at 6:30PM May 07, 2024Observed: 5.1 kcfs at 6:45PM May 07, 2024Observed: 5.12 kcfs at 7:00PM May 07, 2024Observed: 5.12 kcfs at 7:15PM May 07, 2024Observed: 5.12 kcfs at 7:30PM May 07, 2024Observed: 5.1 kcfs at 7:45PM May 07, 2024Observed: 5.1 kcfs at 8:00PM May 07, 2024Observed: 5.1 kcfs at 8:15PM May 07, 2024Observed: 5.1 kcfs at 8:30PM May 07, 2024Observed: 5.1 kcfs at 8:45PM May 07, 2024Observed: 5.1 kcfs at 9:00PM May 07, 2024Observed: 5.12 kcfs at 9:15PM May 07, 2024Observed: 5.1 kcfs at 9:30PM May 07, 2024Observed: 5.1 kcfs at 9:45PM May 07, 2024Observed: 5.12 kcfs at 10:00PM May 07, 2024Observed: 5.1 kcfs at 10:15PM May 07, 2024Observed: 5.1 kcfs at 10:30PM May 07, 2024Observed: 5.08 kcfs at 10:45PM May 07, 2024Observed: 5.1 kcfs at 11:00PM May 07, 2024Observed: 5.1 kcfs at 11:15PM May 07, 2024Observed: 5.1 kcfs at 11:30PM May 07, 2024Observed: 5.1 kcfs at 11:45PM May 07, 2024Observed: 5.1 kcfs at 12:00AM May 08, 2024Observed: 5.08 kcfs at 12:15AM May 08, 2024Observed: 5.08 kcfs at 12:30AM May 08, 2024Observed: 5.08 kcfs at 12:45AM May 08, 2024Observed: 5.1 kcfs at 1:00AM May 08, 2024Observed: 5.12 kcfs at 1:15AM May 08, 2024Observed: 5.12 kcfs at 1:30AM May 08, 2024Observed: 5.12 kcfs at 1:45AM May 08, 2024Observed: 5.12 kcfs at 2:00AM May 08, 2024Observed: 5.1 kcfs at 2:15AM May 08, 2024Observed: 5.1 kcfs at 2:30AM May 08, 2024Observed: 5.12 kcfs at 2:45AM May 08, 2024Observed: 5.12 kcfs at 3:00AM May 08, 2024Observed: 5.1 kcfs at 3:15AM May 08, 2024Observed: 5.08 kcfs at 3:30AM May 08, 2024Observed: 5.08 kcfs at 3:45AM May 08, 2024Observed: 5.08 kcfs at 4:00AM May 08, 2024Observed: 5.1 kcfs at 4:15AM May 08, 2024Observed: 5.1 kcfs at 4:30AM May 08, 2024Observed: 5.12 kcfs at 4:45AM May 08, 2024Observed: 5.12 kcfs at 5:00AM May 08, 2024Observed: 5.1 kcfs at 5:15AM May 08, 2024Observed: 5.12 kcfs at 5:30AM May 08, 2024Observed: 5.1 kcfs at 5:45AM May 08, 2024Observed: 5.1 kcfs at 6:00AM May 08, 2024Observed: 5.35 kcfs at 6:15AM May 08, 2024Observed: 5.65 kcfs at 6:30AM May 08, 2024Observed: 5.78 kcfs at 6:45AM May 08, 2024Observed: 5.78 kcfs at 7:00AM May 08, 2024Observed: 6.09 kcfs at 7:15AM May 08, 2024Observed: 6.37 kcfs at 7:30AM May 08, 2024Observed: 6.45 kcfs at 7:45AM May 08, 2024Observed: 6.52 kcfs at 8:00AM May 08, 2024Observed: 6.52 kcfs at 8:15AM May 08, 2024Observed: 6.54 kcfs at 8:30AM May 08, 2024Observed: 6.56 kcfs at 8:45AM May 08, 2024Observed: 6.58 kcfs at 9:00AM May 08, 2024Observed: 6.58 kcfs at 9:15AM May 08, 2024Observed: 6.58 kcfs at 9:30AM May 08, 2024Observed: 6.58 kcfs at 9:45AM May 08, 2024Observed: 6.6 kcfs at 10:00AM May 08, 2024Highest Observation: 6.63 kcfs at 10:15AM May 08, 2024Observed: 6.6 kcfs at 10:30AM May 08, 2024Observed: 6.6 kcfs at 10:45AM May 08, 2024Observed: 6.54 kcfs at 11:00AM May 08, 2024Observed: 6.54 kcfs at 11:15AM May 08, 2024Observed: 6.56 kcfs at 11:30AM May 08, 2024Observed: 6.54 kcfs at 11:45AM May 08, 2024Observed: 6.54 kcfs at 12:00PM May 08, 2024Observed: 6.54 kcfs at 12:15PM May 08, 2024Observed: 6.54 kcfs at 12:30PM May 08, 2024Highest Observation: 6.63 kcfs at 12:45PM May 08, 2024Observed: 6.6 kcfs at 1:00PM May 08, 2024Highest Forecast: 6.5 kcfs 5:00PM May 08, 2024Forecast: 5.82 kcfs 11:00PM May 08, 2024Forecast: 5.15 kcfs 5:00AM May 09, 2024Forecast: 5.15 kcfs 11:00AM May 09, 2024Forecast: 5.15 kcfs 5:00PM May 09, 2024Forecast: 5.15 kcfs 11:00PM May 09, 2024Forecast: 5.15 kcfs 5:00AM May 10, 2024Forecast: 5.15 kcfs 11:00AM May 10, 2024Forecast: 5.15 kcfs 5:00PM May 10, 2024Forecast: 5.15 kcfs 11:00PM May 10, 2024Forecast: 5.15 kcfs 5:00AM May 11, 2024Forecast: 5.15 kcfs 11:00AM May 11, 2024Forecast: 5.15 kcfs 5:00PM May 11, 2024Forecast: 5.15 kcfs 11:00PM May 11, 2024Forecast: 5.15 kcfs 5:00AM May 12, 2024Forecast: 5.15 kcfs 11:00AM May 12, 2024Forecast: 5.15 kcfs 5:00PM May 12, 2024Forecast: 5.15 kcfs 11:00PM May 12, 2024Forecast: 5.15 kcfs 5:00AM May 13, 2024Forecast: 5.15 kcfs 11:00AM May 13, 2024Forecast: 5.15 kcfs 5:00PM May 13, 2024Forecast: 5.15 kcfs 11:00PM May 13, 2024Forecast: 5.15 kcfs 5:00AM May 14, 2024Forecast: 5.15 kcfs 11:00AM May 14, 2024Forecast: 5.15 kcfs 5:00PM May 14, 2024Forecast: 5.15 kcfs 11:00PM May 14, 2024Forecast: 5.15 kcfs 5:00AM May 15, 2024Forecast: 5.15 kcfs 11:00AM May 15, 2024USGS--Water Resources of the United StatesMAYW1(plotting QRIRZ) Graph Created (1:50PM May 8, 2024)ObservedForecast (issued 9:22AM May 8)Latest observed value: 6.6 kcfs at 1:00 PM PDT 8-May-2024. Flood Flow is 25 kcfs
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Tabular Data (UTC)
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Datum: Not Available
Metadata
NOTE: River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Cowlitz River below Mayfield Dam are issued routinely year-round.

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Upstream Gauge - at Randle Upstream Gauge Downstream Gauge Downstream Gauge - at Castle Rock
Flood Categories (in KCFS)
Major Flood Flow: 45
Moderate Flood Flow: 35
Flood Flow: 25
Action Flow: 17
Low Stage (in feet): -9999

Historic Crests
(1) 68,400 cfs on 11/28/1995
(2) 67,000 cfs on 12/13/1946
(3) 64,700 cfs on 12/04/1975
(4) 64,700 cfs on 01/30/1965
(5) 60,800 cfs on 11/24/1959
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 34,800 cfs on 01/07/2009
(2) 29,224 cfs on 11/09/2006
(3) 25,000 cfs on 01/04/1997
(4) 68,400 cfs on 11/28/1995
(5) 27,000 cfs on 02/19/1995
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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
60000 the Cowlitz River will cause severe near record flooding below Mayfield Dam downstream through Toledo. Deep and swift flood waters will inundate farmlands...roads...and some residential areas...especially near Toledo. Major damage due to erosion is likely. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Cowlitz River Basin.
45000 the Cowlitz River will cause major flooding from Mayfield Dam downstream through Toledo. Deep and swift flood waters will inundate farmlands...roads...and some residential areas...especially near Toledo. Some damage due to erosion is possible. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Cowlitz River Basin.
35000 the Cowlitz River will flood the reach from Mayfield Dam downstream through Toledo. Swift flood waters will inundate some farmlands and several roads...especially near Toledo.
25000 the Cowlitz River will flood the reach from Mayfield Dam downstream through Toledo. Flood waters will inundate some farmlands and several roads...mainly near Toledo.
About This Location Collapse

Latitude: 46.510556° N, Longitude: 122.615000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS flow Not Available Not Available 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 29 226.6 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:
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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.
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