Dear Justin Bowen I think you have problem with the pcp weather input file. So, my advise to you to try to use another pcp weather input file, even if not relate to your work to check out.

regards

Thank you for your response. I found earlier this week that it was an issue with my .wgn files where probability of a wet day after a wet had the same values as the avg days of precip in the month. Once I changed the first line of values to probability values that worked for my watershed, the model ran with a realistic precipitation output.

Partial sample of  000010000.wgn:

0.17  0.18  0.19  0.22  0.21  0.16  0.15  0.13  0.13  0.14  0.13  0.15

7.12  6.78  7.36  8.15  9.04  6.67  6.20  5.45  5.91  5.86  5.82  6.46  --> pr_w (prob of wet day after a wet day)

7.12  6.78  7.36  8.15  9.04  6.67  6.20  5.45  5.91  5.86  5.82  6.46  --> pcpd (avg days of precip in the month)

16.00 17.53 20.32 27.18 38.35 35.56 34.04 45.21 36.83 25.65 22.86 13.90

Please check the weather input files, specifically PCP data. Also, you should check the units of Precipitation data, whether it's in mm or cm, and also the data, whether it's reliable, error-free, and continuous data or not.