North Fork - Somerset Daily Average Forecast Flow (ending 12z on given date) Units: CFSD Created: July 04 2017 DAILY LOCAL: deterministic forecast flow with no contribution from Paonia DAILY TOTAL: deterministic forecast flow with Paonia current operations (official forecast on CBRFC website) ESP LOCAL: 50% exceedance forecast flow based on climatology with no contribution from Paonia ESP TOTAL: 50% exceedance forecast flow based on climatology with Paonia passing flow DATE,LOCAL,TOTAL, 2017-07-05,363,507,Daily Model Output (20170704) 2017-07-06,337,452 2017-07-07,316,402 2017-07-08,298,355 2017-07-09,282,320 2017-07-10,267,303 2017-07-11,253,288 2017-07-12,241,274 2017-07-13,229,262 2017-07-14,218,250 2017-07-15,209,256,ESP Model Output (20170703) 2017-07-16,200,246 2017-07-17,191,235 2017-07-18,183,226 2017-07-19,175,217 2017-07-20,168,209 2017-07-21,161,202 2017-07-22,155,194 2017-07-23,149,188 2017-07-24,144,182 2017-07-25,139,176 2017-07-26,134,172 2017-07-27,130,167 2017-07-28,126,163 2017-07-29,122,159 2017-07-30,119,156 2017-07-31,116,151 SPECIFIC SITE NOTES: GENERAL NOTES: - Days 1-10 are from the CBRFC deterministic model. This uses 5 days of precipitation forecasts and 10 days of temperature forecasts. These are updated daily and will change as the weather forecast changes, so there is increasing uncertainty past days 3-5. - Days 11 and beyond are from the Ensemble Prediction Model (ESP). This model is driven primarily by climatology for the 1981-2015 period. This guidance is probabilistic and used the 50% exceedance value. It is best to use this as a possible pattern of flow into the future as opposed to an exact value that will occur. - An abrupt change in guidance may occur at the switch from the daily model to the ESP model, some possible reasons are: - The daily model is using a temperature forecast that is either much above or below normal before reverting to normal temperatures in ESP. - If there is regulation (reservoirs, diversions, etc.) above the forecast point there may be differences between the two runs in how they are being handled. Please check with CBRFC forecasters for details on specific forecast points.