North Fork - Somerset Daily Average Forecast Flow (ending 12z on given date) Units: CFSD Created: June 21 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, 2017-06-22,1363,1420,Daily Model Output (20170621) 2017-06-23,1250,1324 2017-06-24,1096,1185 2017-06-25,939,1045 2017-06-26,816,930 2017-06-27,720,829 2017-06-28,642,746 2017-06-29,576,674 2017-06-30,511,604 2017-07-01,457,544 2017-07-02,432,516,ESP Model Output (20170620) 2017-07-03,397,477 2017-07-04,368,446 2017-07-05,345,419 2017-07-06,327,398 2017-07-07,308,377 2017-07-08,292,359 2017-07-09,277,341 2017-07-10,265,328 2017-07-11,252,312 2017-07-12,239,298 2017-07-13,228,285 2017-07-14,217,272 2017-07-15,207,260 2017-07-16,198,250 2017-07-17,190,239 2017-07-18,182,234 2017-07-19,175,224 2017-07-20,167,214 2017-07-21,160,205 2017-07-22,155,199 2017-07-23,150,192 2017-07-24,144,185 2017-07-25,139,180 2017-07-26,135,175 2017-07-27,131,170 2017-07-28,127,167 2017-07-29,124,163 2017-07-30,120,160 2017-07-31,117,154 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.