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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts for the Long Tom River at Monroe are issued routinely year-round.
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Upstream Gauge - below Fern Ridge Reservoir Upstream Gauge
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 12
Moderate Flood Stage: 0
Flood Stage: 9
Action Stage: 8.5
Low Stage (in feet): -9999

Historic Crests
(1) 10.42 ft on 01/15/1974
(2) 10.08 ft on 02/07/1996
(3) 10.06 ft on 12/26/1964
(4) 9.59 ft on 01/21/1972
(5) 9.54 ft on 01/18/2006
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(P): Preliminary values subject to further review.

Recent Crests
(1) 9.11 ft on 04/09/2019
(2) 8.93 ft on 01/19/2012
(3) 9.54 ft on 01/18/2006
(4) 9.33 ft on 12/28/1998
(5) 9.04 ft on 11/19/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4.00 ft on 10/01/1939
(2) 4.10 ft on 07/13/2001
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Gauge LocationGauge Map Marker
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
12 flooding impacts buildings in parts of Monroe, especially between Territorial Road and the river. Also expect flooding of the City Park, numerous farms in the area, and several rural roads.
11 flooding threatens some buildings in Monroe between Territorial Road and the river, along with the City Park just north of Hwy 99 and numerous rural roads and farms.
10 flooding impacts some roads and agricultural land in the vicinity of Monroe, and may threaten some homes in low-lying areas.
9 flood waters threaten some roads and low-lying agricultural land in the vicinity of Monroe.
(1) USGS gage house
(2) Upstream view from bridge with gage house on right
(3) Downstream view from bridge

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
10-day Forecast/Trend, Northwest River Forecast Center
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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Portland, OR 97230-1089
(503) 261-9246
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Page last modified: 2-Nov-2020 7:27 PM
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