V4 11 Stormwater Report Rev 3 1 26 2023

Chapter 2 Estimating Runoff and Peak Part 650 Discharges Engineering Field Handbook NJ Supplement NEW JERSEY 24 HOUR RAINFALL FREQUENCY DATA Rainfall amounts in Inches County 1 year 2 year Syear 10year 25year S50year 100 year Atlantic 2.72 3.31 4.30 5.16 6.46 7.61 8.90 Bergen 2.75 3.34 4.27 5.07 6.28 7.32 8.47 Burlington 2.77 3.36 4.34 5.18 6.45 7.56 8.81 Camden 2.73 3.31 4.25 5.06 6.28 7.34 8.52 Cape May 2.67 3.25 4.22 5.07 6.34 7.47 8.73 Cumberland 2.69 3.27 4.25 5.09 6.37 7.49 8.76 Essex 2.85 3.44 4.40 5.22 6.44 7.49 8.66 Gloucester 2.71 3.29 4.24 5.05 6.29 7.36 8.55 Hudson 2.73 3.31 4.23 5.02 6.19 7.20 8.31 Hunterdon 2.80 3.38 4.26 5.00 6.09 7.02 8.03 Mercer 2.74 3.31 4.23 5.01 6.19 7.20 8.33 Middlesex 2.76 3.35 4.30 5.12 6.36 743 8.63 Monmouth 2.79 3.38 4.38 §.23 6.53 7.66 8.94 Morris 2.94 3.54 447 5.24 6.37 7.32 8.35 Ocean 2.81 3.42 4.45 5.33 6.68 7.87 9.20 Passaic 2.87 3.47 442 5.23 6.43 7.47 8.62 Salem 2.69 3.26 4.20 5.00 6.22 7.28 8.45 Somerset 2.76 3.34 4.25 5.01 6.15 7.13 8.21 Sussex 2.68 3.22 4.02 4.70 5.72 6.60 7.58 Union 2.80 3.39 4.35 5.17 6.42 7.49 8.69 Warren 2.78 3.34 4.18 4.89 5.93 6.83 7.82 Notes: The average point rainfall amounts listed above were developed from data contained in NOAA Atlas 14 Volume 2. Point rainfall estimates for specific locations may be obtained from the Precipitation Frequency Data Server located at http://www.nws.noaa.gov/ohd/hdsc/ For most hydrologic design procedures, the rainfall amounts listed above may be rounded to the nearest tenth of an inch. Page 1 of 2 August, 2012