Lehigh River at Walnutport, Northampton County PA (WNTP1)
Gage Location: Northampton County, Pennsylvania	Site Location: Northampton County, Pennsylvania
Latitude: 40.757	Longitude: -75.603	Elevation: 350.27 ft. MSL	Drainage Area: 889 Sq. Mi.
Minor Stage: 8 ft.	Moderate Stage: 12 ft.	Major Stage: 16 ft.
First Flood: 1942-05-23	Last Flood: 2011-09-07 Crest: 8.01 ft.	Datum change: 1946-10-01	Number of Floods: 47

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Month Number of Floods After Datum Number of Floods Total Cumulative Total After Datum Cumulative Total January 4 4 4 4 February 4 4 8 8 March 4 4 12 12 April 5 5 17 17 May 2 3 19 20 June 5 5 24 25 July 2 2 26 27 August 2 2 28 29 September 5 5 33 34 October 2 2 35 36 November 3 3 38 39 December 8 8 46 47 Seasonal Totals Winter (Dec-Jan-Feb) 16 Spring (Mar-Apr-May) 12 Summer (Jun-Jul-Aug) 9 Fall (Sep-Oct-Nov) 10

Codes and description

C1|Crest information looks unreliable and incomplete and not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information looks reliable despite potential problems. This data was used in frequency calculations.
C3|Crest height estimated by the USGS.
C4|Crest height is from the National Weather Service.
C5|Crest height affected by backwater.
C6|Crest occurred at a previous flood stage that is lower than the current flood stage. The crests below the new flood stage are not used in flood frequency calculations.
C7|Crest from USGS yearly peak and/or date is different than the crest we provide. In many cases MARFC uses crest based on backwater or ice effects.
C8|Crest month or day of occurrence has been estimated by The Middle Atlantic River Forecast Center usually based on nearby gage information.
C9|Crest date (day) in the month is unknown.
F1|Flow is an estimate.
F2|Flow affected by regulation or diversion and in some cases to an unknown degree.
F3|Flow effected by snow-melt, ice jam or debris jam break up.
F4|Flow affected by dam failure.
F5|Flow - All or part of the record affected by urbanization, mining, agricultural changes, channelization or other factors.
G1|Gage height at a different site and/or datum.
G2|Gage is not an official USGS gage with crests provided by the NWS. Crest information looks unreliable and incomplete and not used in flood frequency calculations.
G3|Gage datum changed during this year.
none,No code; Good Data

Updated: 08:09 AM Feb 08, 2013