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Hydrograph River at a Glance Download
Concord River at Lowell Stage (ft)Flow (kcfs)Observed: 5.2 ft at 1:30PM Dec 01, 2016Observed: 5.19 ft at 1:45PM Dec 01, 2016Observed: 5.19 ft at 2:00PM Dec 01, 2016Observed: 5.19 ft at 2:15PM Dec 01, 2016Observed: 5.18 ft at 2:30PM Dec 01, 2016Observed: 5.18 ft at 2:45PM Dec 01, 2016Observed: 5.18 ft at 3:00PM Dec 01, 2016Observed: 5.18 ft at 3:15PM Dec 01, 2016Observed: 5.18 ft at 3:30PM Dec 01, 2016Observed: 5.18 ft at 3:45PM Dec 01, 2016Observed: 5.18 ft at 4:00PM Dec 01, 2016Observed: 5.18 ft at 4:15PM Dec 01, 2016Observed: 5.18 ft at 4:30PM Dec 01, 2016Observed: 5.17 ft at 4:45PM Dec 01, 2016Observed: 5.17 ft at 5:00PM Dec 01, 2016Observed: 5.17 ft at 5:15PM Dec 01, 2016Observed: 5.17 ft at 5:30PM Dec 01, 2016Observed: 5.17 ft at 5:45PM Dec 01, 2016Observed: 5.16 ft at 6:00PM Dec 01, 2016Observed: 5.16 ft at 6:15PM Dec 01, 2016Observed: 5.15 ft at 6:30PM Dec 01, 2016Observed: 5.15 ft at 6:45PM Dec 01, 2016Observed: 5.15 ft at 7:00PM Dec 01, 2016Observed: 5.15 ft at 7:15PM Dec 01, 2016Observed: 5.15 ft at 7:30PM Dec 01, 2016Observed: 5.15 ft at 7:45PM Dec 01, 2016Observed: 5.15 ft at 8:00PM Dec 01, 2016Observed: 5.15 ft at 8:15PM Dec 01, 2016Observed: 5.14 ft at 8:30PM Dec 01, 2016Observed: 5.14 ft at 8:45PM Dec 01, 2016Observed: 5.14 ft at 9:00PM Dec 01, 2016Observed: 5.14 ft at 9:15PM Dec 01, 2016Observed: 5.14 ft at 9:30PM Dec 01, 2016Observed: 5.14 ft at 9:45PM Dec 01, 2016Observed: 5.14 ft at 10:00PM Dec 01, 2016Observed: 5.14 ft at 10:15PM Dec 01, 2016Observed: 5.14 ft at 10:30PM Dec 01, 2016Observed: 5.14 ft at 10:45PM Dec 01, 2016Observed: 5.14 ft at 11:00PM Dec 01, 2016Observed: 5.14 ft at 11:15PM Dec 01, 2016Observed: 5.15 ft at 11:30PM Dec 01, 2016Observed: 5.15 ft at 11:45PM Dec 01, 2016Observed: 5.15 ft at 12:00AM Dec 02, 2016Observed: 5.15 ft at 12:15AM Dec 02, 2016Observed: 5.15 ft at 12:30AM Dec 02, 2016Observed: 5.15 ft at 12:45AM Dec 02, 2016Observed: 5.16 ft at 1:00AM Dec 02, 2016Observed: 5.16 ft at 1:15AM Dec 02, 2016Observed: 5.16 ft at 1:30AM Dec 02, 2016Observed: 5.17 ft at 1:45AM Dec 02, 2016Observed: 5.17 ft at 2:00AM Dec 02, 2016Observed: 5.17 ft at 2:15AM Dec 02, 2016Observed: 5.17 ft at 2:30AM Dec 02, 2016Observed: 5.18 ft at 2:45AM Dec 02, 2016Observed: 5.18 ft at 3:00AM Dec 02, 2016Observed: 5.18 ft at 3:15AM Dec 02, 2016Observed: 5.18 ft at 3:30AM Dec 02, 2016Observed: 5.18 ft at 3:45AM Dec 02, 2016Observed: 5.18 ft at 4:00AM Dec 02, 2016Observed: 5.18 ft at 4:15AM Dec 02, 2016Observed: 5.18 ft at 4:30AM Dec 02, 2016Observed: 5.18 ft at 4:45AM Dec 02, 2016Observed: 5.19 ft at 5:00AM Dec 02, 2016Observed: 5.19 ft at 5:15AM Dec 02, 2016Observed: 5.19 ft at 5:30AM Dec 02, 2016Observed: 5.2 ft at 5:45AM Dec 02, 2016Observed: 5.2 ft at 6:00AM Dec 02, 2016Observed: 5.21 ft at 6:15AM Dec 02, 2016Observed: 5.21 ft at 6:30AM Dec 02, 2016Observed: 5.21 ft at 6:45AM Dec 02, 2016Observed: 5.22 ft at 7:00AM Dec 02, 2016Observed: 5.22 ft at 7:15AM Dec 02, 2016Observed: 5.22 ft at 7:30AM Dec 02, 2016Observed: 5.22 ft at 7:45AM Dec 02, 2016Observed: 5.22 ft at 8:00AM Dec 02, 2016Observed: 5.22 ft at 8:15AM Dec 02, 2016Observed: 5.22 ft at 8:30AM Dec 02, 2016Observed: 5.22 ft at 8:45AM Dec 02, 2016Observed: 5.23 ft at 9:00AM Dec 02, 2016Observed: 5.25 ft at 9:15AM Dec 02, 2016Observed: 5.25 ft at 9:30AM Dec 02, 2016Observed: 5.26 ft at 9:45AM Dec 02, 2016Observed: 5.26 ft at 10:00AM Dec 02, 2016Observed: 5.26 ft at 10:15AM Dec 02, 2016Observed: 5.26 ft at 10:30AM Dec 02, 2016Observed: 5.26 ft at 10:45AM Dec 02, 2016Observed: 5.26 ft at 11:00AM Dec 02, 2016Observed: 5.26 ft at 11:15AM Dec 02, 2016Observed: 5.26 ft at 11:30AM Dec 02, 2016Observed: 5.26 ft at 11:45AM Dec 02, 2016Observed: 5.26 ft at 12:00PM Dec 02, 2016Observed: 5.26 ft at 12:15PM Dec 02, 2016Observed: 5.27 ft at 12:30PM Dec 02, 2016Observed: 5.27 ft at 12:45PM Dec 02, 2016Observed: 5.27 ft at 1:00PM Dec 02, 2016Observed: 5.27 ft at 1:15PM Dec 02, 2016Observed: 5.27 ft at 1:30PM Dec 02, 2016Observed: 5.27 ft at 1:45PM Dec 02, 2016Observed: 5.27 ft at 2:00PM Dec 02, 2016Observed: 5.27 ft at 2:15PM Dec 02, 2016Observed: 5.27 ft at 2:30PM Dec 02, 2016Observed: 5.28 ft at 2:45PM Dec 02, 2016Observed: 5.28 ft at 3:00PM Dec 02, 2016Observed: 5.29 ft at 3:15PM Dec 02, 2016Observed: 5.29 ft at 3:30PM Dec 02, 2016Observed: 5.29 ft at 3:45PM Dec 02, 2016Observed: 5.29 ft at 4:00PM Dec 02, 2016Observed: 5.29 ft at 4:15PM Dec 02, 2016Observed: 5.29 ft at 4:30PM Dec 02, 2016Observed: 5.29 ft at 4:45PM Dec 02, 2016Observed: 5.29 ft at 5:00PM Dec 02, 2016Observed: 5.29 ft at 5:15PM Dec 02, 2016Observed: 5.3 ft at 5:30PM Dec 02, 2016Observed: 5.3 ft at 5:45PM Dec 02, 2016Observed: 5.3 ft at 6:00PM Dec 02, 2016Observed: 5.3 ft at 6:15PM Dec 02, 2016Observed: 5.3 ft at 6:30PM Dec 02, 2016Observed: 5.3 ft at 6:45PM Dec 02, 2016Observed: 5.3 ft at 7:00PM Dec 02, 2016Observed: 5.3 ft at 7:15PM Dec 02, 2016Observed: 5.3 ft at 7:30PM Dec 02, 2016Observed: 5.3 ft at 7:45PM Dec 02, 2016Observed: 5.3 ft at 8:00PM Dec 02, 2016Observed: 5.3 ft at 8:15PM Dec 02, 2016Observed: 5.3 ft at 8:30PM Dec 02, 2016Observed: 5.3 ft at 8:45PM Dec 02, 2016Observed: 5.31 ft at 9:00PM Dec 02, 2016Observed: 5.31 ft at 9:15PM Dec 02, 2016Observed: 5.31 ft at 9:30PM Dec 02, 2016Observed: 5.31 ft at 9:45PM Dec 02, 2016Observed: 5.31 ft at 10:00PM Dec 02, 2016Observed: 5.31 ft at 10:15PM Dec 02, 2016Observed: 5.31 ft at 10:30PM Dec 02, 2016Observed: 5.31 ft at 10:45PM Dec 02, 2016Observed: 5.31 ft at 11:00PM Dec 02, 2016Observed: 5.31 ft at 11:15PM Dec 02, 2016Observed: 5.31 ft at 11:30PM Dec 02, 2016Observed: 5.31 ft at 11:45PM Dec 02, 2016Observed: 5.32 ft at 12:00AM Dec 03, 2016Observed: 5.32 ft at 12:15AM Dec 03, 2016Observed: 5.32 ft at 12:30AM Dec 03, 2016Observed: 5.32 ft at 12:45AM Dec 03, 2016Observed: 5.31 ft at 1:00AM Dec 03, 2016Observed: 5.32 ft at 1:15AM Dec 03, 2016Observed: 5.33 ft at 1:30AM Dec 03, 2016Observed: 5.33 ft at 1:45AM Dec 03, 2016Observed: 5.33 ft at 2:00AM Dec 03, 2016Observed: 5.33 ft at 2:15AM Dec 03, 2016Observed: 5.33 ft at 2:30AM Dec 03, 2016Observed: 5.33 ft at 2:45AM Dec 03, 2016Observed: 5.33 ft at 3:00AM Dec 03, 2016Observed: 5.33 ft at 3:15AM Dec 03, 2016Observed: 5.33 ft at 3:30AM Dec 03, 2016Observed: 5.33 ft at 3:45AM Dec 03, 2016Observed: 5.33 ft at 4:00AM Dec 03, 2016Observed: 5.33 ft at 4:15AM Dec 03, 2016Observed: 5.34 ft at 4:30AM Dec 03, 2016Observed: 5.34 ft at 4:45AM Dec 03, 2016Observed: 5.34 ft at 5:00AM Dec 03, 2016Observed: 5.34 ft at 5:15AM Dec 03, 2016Observed: 5.34 ft at 5:30AM Dec 03, 2016Observed: 5.34 ft at 5:45AM Dec 03, 2016Observed: 5.34 ft at 6:00AM Dec 03, 2016Observed: 5.34 ft at 6:15AM Dec 03, 2016Observed: 5.34 ft at 6:30AM Dec 03, 2016Observed: 5.34 ft at 6:45AM Dec 03, 2016Observed: 5.34 ft at 7:00AM Dec 03, 2016Observed: 5.34 ft at 7:15AM Dec 03, 2016Observed: 5.34 ft at 7:30AM Dec 03, 2016Observed: 5.34 ft at 7:45AM Dec 03, 2016Observed: 5.34 ft at 8:00AM Dec 03, 2016Observed: 5.34 ft at 8:15AM Dec 03, 2016Observed: 5.34 ft at 8:30AM Dec 03, 2016Observed: 5.34 ft at 8:45AM Dec 03, 2016Observed: 5.34 ft at 9:00AM Dec 03, 2016Observed: 5.34 ft at 9:15AM Dec 03, 2016Observed: 5.34 ft at 9:30AM Dec 03, 2016Observed: 5.34 ft at 9:45AM Dec 03, 2016Observed: 5.34 ft at 10:00AM Dec 03, 2016Observed: 5.34 ft at 10:15AM Dec 03, 2016Observed: 5.34 ft at 10:30AM Dec 03, 2016Observed: 5.34 ft at 10:45AM Dec 03, 2016Observed: 5.34 ft at 11:00AM Dec 03, 2016Observed: 5.34 ft at 11:15AM Dec 03, 2016Observed: 5.34 ft at 11:30AM Dec 03, 2016Observed: 5.34 ft at 11:45AM Dec 03, 2016Observed: 5.34 ft at 12:00PM Dec 03, 2016Observed: 5.34 ft at 12:15PM Dec 03, 2016Observed: 5.34 ft at 12:30PM Dec 03, 2016Observed: 5.34 ft at 12:45PM Dec 03, 2016Observed: 5.34 ft at 1:00PM Dec 03, 2016Observed: 5.35 ft at 1:15PM Dec 03, 2016Observed: 5.34 ft at 1:30PM Dec 03, 2016Observed: 5.35 ft at 1:45PM Dec 03, 2016Observed: 5.35 ft at 2:00PM Dec 03, 2016Observed: 5.35 ft at 2:15PM Dec 03, 2016Observed: 5.35 ft at 2:30PM Dec 03, 2016Observed: 5.35 ft at 2:45PM Dec 03, 2016Observed: 5.36 ft at 3:00PM Dec 03, 2016Observed: 5.36 ft at 3:15PM Dec 03, 2016Observed: 5.36 ft at 3:30PM Dec 03, 2016Observed: 5.36 ft at 3:45PM Dec 03, 2016Observed: 5.37 ft at 4:00PM Dec 03, 2016Observed: 5.37 ft at 4:15PM Dec 03, 2016Observed: 5.37 ft at 4:30PM Dec 03, 2016Observed: 5.37 ft at 4:45PM Dec 03, 2016Observed: 5.37 ft at 5:00PM Dec 03, 2016Observed: 5.37 ft at 5:15PM Dec 03, 2016Observed: 5.37 ft at 5:30PM Dec 03, 2016Observed: 5.37 ft at 5:45PM Dec 03, 2016Observed: 5.37 ft at 6:00PM Dec 03, 2016Highest Observation: 5.38 ft at 6:15PM Dec 03, 2016Highest Observation: 5.38 ft at 6:30PM Dec 03, 2016Highest Observation: 5.38 ft at 6:45PM Dec 03, 2016Highest Observation: 5.38 ft at 7:00PM Dec 03, 2016Highest Observation: 5.38 ft at 7:15PM Dec 03, 2016Highest Observation: 5.38 ft at 7:30PM Dec 03, 2016Highest Observation: 5.38 ft at 7:45PM Dec 03, 2016Highest Observation: 5.38 ft at 8:00PM Dec 03, 2016Highest Observation: 5.38 ft at 8:15PM Dec 03, 2016Highest Observation: 5.38 ft at 8:30PM Dec 03, 2016Highest Observation: 5.38 ft at 8:45PM Dec 03, 2016Highest Observation: 5.38 ft at 9:00PM Dec 03, 2016Highest Observation: 5.38 ft at 9:15PM Dec 03, 2016Highest Observation: 5.38 ft at 9:30PM Dec 03, 2016Highest Observation: 5.38 ft at 9:45PM Dec 03, 2016Highest Observation: 5.38 ft at 10:00PM Dec 03, 2016Highest Observation: 5.38 ft at 10:15PM Dec 03, 2016Highest Observation: 5.38 ft at 10:30PM Dec 03, 2016Highest Observation: 5.38 ft at 10:45PM Dec 03, 2016Highest Observation: 5.38 ft at 11:00PM Dec 03, 2016Highest Observation: 5.38 ft at 11:15PM Dec 03, 2016Observed: 5.37 ft at 11:30PM Dec 03, 2016Observed: 5.37 ft at 11:45PM Dec 03, 2016Highest Observation: 5.38 ft at 12:00AM Dec 04, 2016Observed: 5.37 ft at 12:15AM Dec 04, 2016Observed: 5.37 ft at 12:30AM Dec 04, 2016Observed: 5.37 ft at 12:45AM Dec 04, 2016Observed: 5.37 ft at 1:00AM Dec 04, 2016Observed: 5.37 ft at 1:15AM Dec 04, 2016Observed: 5.37 ft at 1:30AM Dec 04, 2016Observed: 5.37 ft at 1:45AM Dec 04, 2016Observed: 5.37 ft at 2:00AM Dec 04, 2016Observed: 5.37 ft at 2:15AM Dec 04, 2016Observed: 5.37 ft at 2:30AM Dec 04, 2016Observed: 5.37 ft at 2:45AM Dec 04, 2016Observed: 5.37 ft at 3:00AM Dec 04, 2016Observed: 5.37 ft at 3:15AM Dec 04, 2016Observed: 5.37 ft at 3:30AM Dec 04, 2016Observed: 5.37 ft at 3:45AM Dec 04, 2016Observed: 5.37 ft at 4:00AM Dec 04, 2016Observed: 5.37 ft at 4:15AM Dec 04, 2016Observed: 5.36 ft at 4:30AM Dec 04, 2016Observed: 5.36 ft at 4:45AM Dec 04, 2016Observed: 5.36 ft at 5:00AM Dec 04, 2016Observed: 5.36 ft at 5:15AM Dec 04, 2016Observed: 5.35 ft at 5:30AM Dec 04, 2016Observed: 5.35 ft at 5:45AM Dec 04, 2016Observed: 5.35 ft at 6:00AM Dec 04, 2016Observed: 5.35 ft at 6:15AM Dec 04, 2016Observed: 5.35 ft at 6:30AM Dec 04, 2016Observed: 5.35 ft at 6:45AM Dec 04, 2016Observed: 5.35 ft at 7:00AM Dec 04, 2016Observed: 5.35 ft at 7:15AM Dec 04, 2016Observed: 5.35 ft at 7:30AM Dec 04, 2016Observed: 5.35 ft at 7:45AM Dec 04, 2016Observed: 5.35 ft at 8:00AM Dec 04, 2016Observed: 5.35 ft at 8:15AM Dec 04, 2016Observed: 5.35 ft at 8:30AM Dec 04, 2016Observed: 5.35 ft at 8:45AM Dec 04, 2016Observed: 5.35 ft at 9:00AM Dec 04, 2016Observed: 5.34 ft at 9:15AM Dec 04, 2016Observed: 5.34 ft at 9:30AM Dec 04, 2016Observed: 5.34 ft at 9:45AM Dec 04, 2016Observed: 5.34 ft at 10:00AM Dec 04, 2016Observed: 5.34 ft at 10:15AM Dec 04, 2016Observed: 5.34 ft at 10:30AM Dec 04, 2016Observed: 5.34 ft at 10:45AM Dec 04, 2016Observed: 5.34 ft at 11:00AM Dec 04, 2016Observed: 5.34 ft at 11:15AM Dec 04, 2016Observed: 5.34 ft at 11:30AM Dec 04, 2016Observed: 5.34 ft at 11:45AM Dec 04, 2016Observed: 5.34 ft at 12:00PM Dec 04, 2016Observed: 5.34 ft at 12:15PM Dec 04, 2016Observed: 5.34 ft at 12:30PM Dec 04, 2016Highest Forecast: 5.3 ft 7:00PM Dec 04, 2016Highest Forecast: 5.3 ft 1:00AM Dec 05, 2016Highest Forecast: 5.3 ft 7:00AM Dec 05, 2016Highest Forecast: 5.3 ft 1:00PM Dec 05, 2016Highest Forecast: 5.3 ft 7:00PM Dec 05, 2016Highest Forecast: 5.3 ft 1:00AM Dec 06, 2016Highest Forecast: 5.3 ft 7:00AM Dec 06, 2016Forecast: 5.2 ft 1:00PM Dec 06, 2016Forecast: 5.2 ft 7:00PM Dec 06, 2016Forecast: 5.2 ft 1:00AM Dec 07, 2016Forecast: 5.2 ft 7:00AM Dec 07, 2016USGS--Water Resources of the United StatesLCNM3(plotting HGIRG) Graph Created (1:15PM Dec 4, 2016)ObservedForecast (issued 10:50AM Dec 4)Latest observed value: 5.34 ft at 12:30 PM EST 4-Dec-2016. Flood Stage is 8 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the Concord River at Lowell are issued routinely year-round.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 12
Moderate Flood Stage: 10
Flood Stage: 8
Action Stage: 7.5
Low Stage (in feet): 0

Historic Crests
(1) 9.74 ft on 03/17/2010
(2) 9.64 ft on 04/03/2010
(3) 9.60 ft on 01/28/1979
(4) 9.60 ft on 04/10/1987
(5) 8.97 ft on 08/23/1955
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 9.64 ft on 04/03/2010
(2) 9.74 ft on 03/17/2010
(3) 8.33 ft on 03/01/2010
(4) 8.15 ft on 03/11/2008
(5) 8.48 ft on 04/20/2007
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: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
15.5 This is the maximum recordable river stage at this location.
10 Significant flooding affects people living along the river. In Lowell, Merrill Street, Joiners and Clark Courts, Billerica and Lawrence streets may be most affected. In Billerica, Pershing Street and Stoney Drive as well as the Elsie Avenue neighborhood will be affected. In Bedford, impacted areas include Carlisle Road (Route 225), Bonnyvale Drive, and Sheridan Road. In Concord, the affected areas may include Route 117 and Route 2. Follow the directions of emergency local officals.
9 Significant residential flooding will affect people living along the Concord River. In Lowell, Merrill Street, Joiners and Clark Courts may be affected. In Billerica, Pershing Street and Stoney Drive as well as the Elsie Avenue neighborhood will be affected. Follow the directions of emergency management officials.
8.5 Flooding is expected along portions of the Concord River. This includes homes on Joiners and Clark Courts and Merrill Street in Lowell. It also includes some residences in Billerica along Pershing Street, Stoney Drive, and on Elsie Avenue off River Street.
8 Low lying areas along the Concord River will be flooded. The area most prone to flooding is a small section of Billerica along Elsie Avenue off River Street.
About This Location Collapse

Latitude: 42.636758° N, Longitude: 71.302005° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 8 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 67.41 75.41 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other NULL NULL  

Current/Historical Observations:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

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.
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