SWMM-CAT Online

Disclaimer: This tool is a web-based adaptation of the original EPA SWMM-CAT for educational and demonstration purposes. Official guidance may be shifting towards resources like NOAA Atlas 15 for future climate projections. Please consult official EPA resources for current recommendations.

Download the original EPA SWMM-CAT (.exe): SWMM-CAT_v1.0.zip

1. Select Location on Map:

Selected Coordinates: Click map to select

2. Select Climate Adjustment Parameters:

Climate Year: 2035 2060

Climate Scenario: Hot/Dry Central Warm/Wet

Adjustment Type:

Temperature

Precipitation

Evaporation

24-Hour Design Storm

Please select a map location and adjustment parameters to view graph/data.

3. (Experimental) Select SWMM File for Processing:

Note: It is currently recommended to download and use the original SWMM-CAT if adjustments to an .inp file are required, as this web tool's file processing feature is experimental and not extensively tested.

Selecting a file enables the 'Process File' button to apply adjustments directly to your input file.

SWMM-CAT Online

Monthly Adjustment Data

24-Hour Design Storm Depths (Historic)