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Ramapo River at Mahwah, NJ (MAWN4)


Data Type




Inundation Levels
NAVD88 Stage

269.217.0
268.216.0
Record Crest: 15.78 ft
267.215.0
266.214.0
265.213.0
264.212.0

Major Flooding Begins

263.211.0
262.210.0
261.29.0

Moderate Flooding Begins

260.28.0

Minor Flooding Begins

259.77.5

Near Flooding Begins

258.76.5
* = Extended rating
Weather Forecast Office Upton, NY Middle Atlantic River Forecast Center
Hydrograph River at a Glance Download Inundation
Mapping
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Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

Current Stage:
3.1 ft at 11/24/2017 02:30:00 UTC
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Inundation Legend
Depth in feet
USGS Gauge Location Gauge Location
What is UTC time? Map Help

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.

Gauge Information Collapse

Map Overlays

Flood Categories (in feet)
Major Flood Stage: 12
Moderate Flood Stage: 9
Flood Stage: 8
Action Stage: 7.5
Low Stage (in feet): 0

Historic Crests
(1) 15.78 ft on 08/28/2011
(2) 12.53 ft on 10/16/1955
(3) 12.52 ft on 09/16/1999
(4) 11.87 ft on 05/29/1968
(5) 11.35 ft on 08/19/1955
(6) 11.16 ft on 03/07/2011
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 15.78 ft on 08/28/2011
(2) 9.55 ft on 04/17/2011
(3) 10.72 ft on 03/11/2011
(4) 11.16 ft on 03/07/2011
(5) 8.07 ft on 12/12/2008
(6) 9.85 ft on 10/13/2005
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
12 Major flooding along Route 202 and Route 17 intersection. Road closed. Flooding along Riverview Drive and along Halifax Road and Bridle Path Lane. Flooding on Brakeshoe Place, Brook Street and Catherine Avenue.
9 State Route 202 floods downstream. Moderate flooding along Route 202 and Route 17. Water into backyards. Minor flooding along Brakeshoe Place, Brook Street and Catherine Avenue.
8 Minor flooding along Route 202.
Photos
(1) Ramapo River at Mahwah
Other Data Sources Collapse
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.

Forecasts for the Ramapo River at Mahwah are issued as needed during times of high water, and are routinely available.
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Page last modified: 21-Dec-2016 10:42 PM
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.