The Indus has been truly called a life line of Pakistan. It is the river through which most of the water flows down to the plain of Punjab and Sindh. Most of the flows north of Tarbela are caused by the snowmelt over the elevated catchments of the northern areas. Further more melt water yield of upper Indus basin indicates large scale variation. For example the range of variation of the discharge at Bisham Qila for the month of June during the period 1965-1988 ranges from 1310 cusecs to about 12800 cusecs. The above two facts alone necessitate a system to predict the variability of flows of such a large extent. A methodology through which the seasonal and the monthly inflows at Tarbela could be forecast, shall constitute an important technical development since the judicial use of the available water for power and irrigation largely depend upon the advance knowledge of the incoming inflows. WAPDA attempted to tackle the problem through the technical assistance from Canada as a cooperative research program with "Wilfred Laurier University (WLU)" Waterlov and International Development research centre (IDRC). A project called Snow and Ice hydrography project came into existence for this proposal. The project is in existence since early eighties. The approach adopted in computing the seasonal and ten daily inflows is essentially based upon the use of a snow melt model called the University of British Columbia (UBC) model. A number of snow pillows for the measurement of the snow have been established in the upper reaches of the catchments at tremendous cost. Data from these snow pillows constitutes the major input in the UBC model. Maintenance of these snow pillows at such high elevation involves formidable cost. Indus has large and elevated catchments spread over an area of 180,000 sqr miles. It`s river length above Tarbela is about 925 miles and there are five right bank and three left bank tributaries named Singhi river, Shyok river, Shiger River, Gilgit river, Astore river, and Tansher river, Dras river and Siran river respectively. Most of the catchment above Tarbela is mountainous having some of the highest peaks next to the Everest. Most of the snow melt contribution comes from the elevation range between 2500 and 5500m and about 80 to 90% of the upper Indus catchments gets covered with snow every year during winter. The contribution from the Glaciers to the annual inflow volumes volume is included in melt water yield due to the snow and melt able ice. Large number of Glaciers exists within the catchments of which 35 are the larger ones. Some are extremely big like Siachene and Biafo. Glaciers originate in the high snow fall area where there is considerable relief above 4800m ASL. Most of the melt water yield comes from the ice that has flowed to lower altitudes mainly in the range between 3-5000m. The method used herein does not involve the study of Glaciers or the consideration of the Glacier melt yield. It takes for granted that the total snow melt shall be an aggregate of the yield due to snow and Glacier melt yields. Thus the melt water yield from snow and the meltable Ice is assumed to generate the runoff component due to melt water yield. Super imposed upon this is the component of runoff due to the rainfall during the Kharif season. The total inflow shall be an aggregate of the two runoff components. The prediction of the temperature and Kharif period rainfall about six months in advance is presently not possible. Thus the Kharif season forecast methodology shall be based upon the assumption of normal rainfall and temperature conditions. Provision exists in the method to cater for variation from normal conditions in case this could be predicted with reasonable reliability. The Method provides and alternate approach eliminating the need for the direct snow measurements. The method is both cost free as well as convenient involving the use of such data as shall be routinely available immediately at the end of winter season.