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Hydrograph River at a Glance Download
Snohomish River near Monroe Stage (ft)Flow (kcfs)Observed: 6.41 ft at 7:30PM Apr 17, 2014Observed: 6.46 ft at 8:00PM Apr 17, 2014Observed: 6.5 ft at 8:30PM Apr 17, 2014Observed: 6.55 ft at 9:00PM Apr 17, 2014Observed: 6.6 ft at 9:30PM Apr 17, 2014Observed: 6.65 ft at 10:00PM Apr 17, 2014Observed: 6.7 ft at 10:30PM Apr 17, 2014Observed: 6.76 ft at 11:00PM Apr 17, 2014Observed: 6.82 ft at 11:30PM Apr 17, 2014Observed: 6.9 ft at 12:00AM Apr 18, 2014Observed: 6.99 ft at 12:30AM Apr 18, 2014Observed: 7.06 ft at 1:00AM Apr 18, 2014Observed: 7.12 ft at 1:30AM Apr 18, 2014Observed: 7.18 ft at 2:00AM Apr 18, 2014Observed: 7.24 ft at 2:30AM Apr 18, 2014Observed: 7.28 ft at 3:00AM Apr 18, 2014Observed: 7.33 ft at 3:30AM Apr 18, 2014Observed: 7.37 ft at 4:00AM Apr 18, 2014Observed: 7.42 ft at 4:30AM Apr 18, 2014Observed: 7.45 ft at 5:00AM Apr 18, 2014Observed: 7.48 ft at 5:30AM Apr 18, 2014Observed: 7.52 ft at 6:00AM Apr 18, 2014Observed: 7.55 ft at 6:30AM Apr 18, 2014Observed: 7.58 ft at 7:00AM Apr 18, 2014Observed: 7.6 ft at 7:30AM Apr 18, 2014Observed: 7.62 ft at 8:00AM Apr 18, 2014Observed: 7.64 ft at 8:30AM Apr 18, 2014Observed: 7.66 ft at 9:00AM Apr 18, 2014Observed: 7.66 ft at 9:30AM Apr 18, 2014Highest Observation: 7.67 ft at 10:00AM Apr 18, 2014Highest Observation: 7.67 ft at 10:30AM Apr 18, 2014Highest Observation: 7.67 ft at 11:00AM Apr 18, 2014Highest Observation: 7.67 ft at 11:30AM Apr 18, 2014Observed: 7.66 ft at 12:00PM Apr 18, 2014Observed: 7.65 ft at 12:30PM Apr 18, 2014Observed: 7.64 ft at 1:00PM Apr 18, 2014Observed: 7.63 ft at 1:30PM Apr 18, 2014Observed: 7.62 ft at 2:00PM Apr 18, 2014Observed: 7.6 ft at 2:30PM Apr 18, 2014Observed: 7.58 ft at 3:00PM Apr 18, 2014Observed: 7.56 ft at 3:30PM Apr 18, 2014Observed: 7.54 ft at 4:00PM Apr 18, 2014Observed: 7.52 ft at 4:30PM Apr 18, 2014Observed: 7.5 ft at 5:00PM Apr 18, 2014Observed: 7.47 ft at 5:30PM Apr 18, 2014Observed: 7.45 ft at 6:00PM Apr 18, 2014Observed: 7.43 ft at 6:30PM Apr 18, 2014Observed: 7.4 ft at 7:00PM Apr 18, 2014Observed: 7.39 ft at 7:30PM Apr 18, 2014Observed: 7.36 ft at 8:00PM Apr 18, 2014Observed: 7.34 ft at 8:30PM Apr 18, 2014Observed: 7.32 ft at 9:00PM Apr 18, 2014Observed: 7.3 ft at 9:30PM Apr 18, 2014Observed: 7.27 ft at 10:00PM Apr 18, 2014Observed: 7.26 ft at 10:30PM Apr 18, 2014Observed: 7.23 ft at 11:00PM Apr 18, 2014Observed: 7.2 ft at 11:30PM Apr 18, 2014Observed: 7.18 ft at 12:00AM Apr 19, 2014Observed: 7.16 ft at 12:30AM Apr 19, 2014Observed: 7.12 ft at 1:00AM Apr 19, 2014Observed: 7.1 ft at 1:30AM Apr 19, 2014Observed: 7.06 ft at 2:00AM Apr 19, 2014Observed: 7.04 ft at 2:30AM Apr 19, 2014Observed: 7.01 ft at 3:00AM Apr 19, 2014Observed: 6.98 ft at 3:30AM Apr 19, 2014Observed: 6.95 ft at 4:00AM Apr 19, 2014Observed: 6.92 ft at 4:30AM Apr 19, 2014Observed: 6.89 ft at 5:00AM Apr 19, 2014Observed: 6.86 ft at 5:30AM Apr 19, 2014Observed: 6.83 ft at 6:00AM Apr 19, 2014Observed: 6.8 ft at 6:30AM Apr 19, 2014Observed: 6.77 ft at 7:00AM Apr 19, 2014Observed: 6.74 ft at 7:30AM Apr 19, 2014Observed: 6.71 ft at 8:00AM Apr 19, 2014Observed: 6.68 ft at 8:30AM Apr 19, 2014Observed: 6.65 ft at 9:00AM Apr 19, 2014Observed: 6.62 ft at 9:30AM Apr 19, 2014Observed: 6.59 ft at 10:00AM Apr 19, 2014Observed: 6.56 ft at 10:30AM Apr 19, 2014Observed: 6.53 ft at 11:00AM Apr 19, 2014Observed: 6.5 ft at 11:30AM Apr 19, 2014Observed: 6.46 ft at 12:00PM Apr 19, 2014Observed: 6.44 ft at 12:30PM Apr 19, 2014Observed: 6.42 ft at 1:00PM Apr 19, 2014Observed: 6.39 ft at 1:30PM Apr 19, 2014Observed: 6.36 ft at 2:00PM Apr 19, 2014Observed: 6.34 ft at 2:30PM Apr 19, 2014Observed: 6.32 ft at 3:00PM Apr 19, 2014Observed: 6.29 ft at 3:30PM Apr 19, 2014Observed: 6.26 ft at 4:00PM Apr 19, 2014Observed: 6.23 ft at 4:30PM Apr 19, 2014Observed: 6.21 ft at 5:00PM Apr 19, 2014Observed: 6.18 ft at 5:30PM Apr 19, 2014Observed: 6.16 ft at 6:00PM Apr 19, 2014Observed: 6.13 ft at 6:30PM Apr 19, 2014Observed: 6.11 ft at 7:00PM Apr 19, 2014Observed: 6.09 ft at 7:30PM Apr 19, 2014Observed: 6.07 ft at 8:00PM Apr 19, 2014Observed: 6.05 ft at 8:30PM Apr 19, 2014Observed: 6.04 ft at 9:00PM Apr 19, 2014Observed: 6.02 ft at 9:30PM Apr 19, 2014Observed: 6.01 ft at 10:00PM Apr 19, 2014Observed: 6 ft at 10:30PM Apr 19, 2014Observed: 5.98 ft at 11:00PM Apr 19, 2014Observed: 5.97 ft at 11:30PM Apr 19, 2014Observed: 5.97 ft at 12:00AM Apr 20, 2014Observed: 5.96 ft at 12:30AM Apr 20, 2014Observed: 5.96 ft at 1:00AM Apr 20, 2014Observed: 5.95 ft at 1:30AM Apr 20, 2014Observed: 5.94 ft at 2:00AM Apr 20, 2014Observed: 5.93 ft at 2:30AM Apr 20, 2014Observed: 5.93 ft at 3:00AM Apr 20, 2014Observed: 5.93 ft at 3:30AM Apr 20, 2014Observed: 5.93 ft at 4:00AM Apr 20, 2014Observed: 5.92 ft at 4:30AM Apr 20, 2014Observed: 5.93 ft at 5:00AM Apr 20, 2014Observed: 5.93 ft at 5:30AM Apr 20, 2014Observed: 5.93 ft at 6:00AM Apr 20, 2014Observed: 5.92 ft at 6:30AM Apr 20, 2014Observed: 5.93 ft at 7:00AM Apr 20, 2014Observed: 5.92 ft at 7:30AM Apr 20, 2014Observed: 5.92 ft at 8:00AM Apr 20, 2014Observed: 5.92 ft at 8:30AM Apr 20, 2014Observed: 5.92 ft at 9:00AM Apr 20, 2014Observed: 5.92 ft at 9:30AM Apr 20, 2014Observed: 5.92 ft at 10:00AM Apr 20, 2014Observed: 5.92 ft at 10:30AM Apr 20, 2014Observed: 5.92 ft at 11:00AM Apr 20, 2014Observed: 5.92 ft at 11:30AM Apr 20, 2014Observed: 5.94 ft at 12:00PM Apr 20, 2014Observed: 5.98 ft at 12:30PM Apr 20, 2014Observed: 6.01 ft at 1:00PM Apr 20, 2014Observed: 6.02 ft at 1:30PM Apr 20, 2014Observed: 6.03 ft at 2:00PM Apr 20, 2014Observed: 6.03 ft at 2:30PM Apr 20, 2014Observed: 6.03 ft at 3:00PM Apr 20, 2014Observed: 6.03 ft at 3:30PM Apr 20, 2014Observed: 6.02 ft at 4:00PM Apr 20, 2014Observed: 6.02 ft at 4:30PM Apr 20, 2014Observed: 6.01 ft at 5:00PM Apr 20, 2014Observed: 5.99 ft at 5:30PM Apr 20, 2014Observed: 5.98 ft at 6:00PM Apr 20, 2014Forecast: 5.97 ft 11:00PM Apr 20, 2014Forecast: 5.78 ft 5:00AM Apr 21, 2014Forecast: 5.63 ft 11:00AM Apr 21, 2014Forecast: 5.48 ft 5:00PM Apr 21, 2014Forecast: 5.37 ft 11:00PM Apr 21, 2014Forecast: 5.44 ft 5:00AM Apr 22, 2014Forecast: 5.95 ft 11:00AM Apr 22, 2014Forecast: 6.79 ft 5:00PM Apr 22, 2014Highest Forecast: 7.17 ft 11:00PM Apr 22, 2014Forecast: 7.06 ft 5:00AM Apr 23, 2014Forecast: 6.82 ft 11:00AM Apr 23, 2014Forecast: 6.57 ft 5:00PM Apr 23, 2014USGS--Water Resources of the United StatesMROW1(plotting HGIRG) Graph Created (7:03PM Apr 20, 2014)ObservedForecast (issued 9:59AM Apr 20)Latest observed value: 5.98 ft at 6:00 PM PDT 20-Apr-2014. Flood Stage is 15 ft
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Tabular Data (UTC)
Tabular Data (PDT)
XML Data
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Datum: Not Available
Metadata
NOTE: Forecasts for the Snohomish River near Monroe are issued routinely year-round.
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Downstream Gauge Downstream Gauge - at Snohomish
Flood Categories (in feet)
Major Flood Stage:17
Moderate Flood Stage:16
Flood Stage:15
Action Stage:0

Historical Crests
(1) 25.30 ft on 11/25/1990
(2) 24.12 ft on 01/08/2009
(3) 24.10 ft on 11/30/1995
(4) 23.54 ft on 11/07/2006
(5) 22.92 ft on 12/04/1975
Show More Historical Crests

Low Water Records
(1) 0.51 ft on 10/31/1987
Zoom Level: 16
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
If you notice any errors in the below information, please contact our Webmaster
22 the Snohomish River will cause severe flooding...with deep and swift flood waters inundating farm land...residential areas...and roads. Levees could suffer overtopping and major damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 22 feet at this location corresponds to Phase 4 in the Snohomish County Flood Warning System.
21 Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. The Snohomish River stage at this location corresponds to Phase 4 in the Snohomish County Flood Warning System.
20 the Snohomish River will cause severe flooding in the valley. The river will flood many homes...cover much of the farmlands...and close many roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 20 feet at this location corresponds to Phase 3 in the Snohomish County Flood Warning System.
17 the Snohomish River will cause major flooding...inundating farm land...roads...and some residential areas. Levees will likely suffer damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 17 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
16 the Snohomish River will flood several roads and much of the low pasture land in the river valley. A stage of 16 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
15 the Snohomish River will cause minor flooding of low pasture lands and several roads near the river. A stage of 15 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
14 feet...the Snohomish River will locally spill over its banks into low pasture lands along the river.
About This Location Collapse

Latitude: 47.831111° N, Longitude: 122.047222° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 15 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 13.25 ft 28.25 ft 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.
NWS Information
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Seattle, WA 98115-6349
(206) 526-6087
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Page last modified: 8-Apr-2014 5:33 AM
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