It shows a 20-day ensemble streamflow prediction for a dynamic reporting point in the Indus River, few kilometers downstream the city of Sukkur, in the Sindh province of Pakistan. Forecasts show a sharp rise of discharge in the river, with expected peak of the ensemble mean on the 10 August, hence 13 days after the prediction was issued. The uncertainty range increases with the lead time, though it almost completely exceeds the severe alert level from the 8 to the 12 August.
Satellite images of the Indus River on 10 July 2010 (top) and on 11 August 2010 (bottom). Top panel also shows, with purple shadings, the maximum probability of exceeding the severe threshold in a 20-day forecast range (forecast on 28 July 2010).
Alfieri, L., Burek, P., Dutra, E., Krzeminski, B., Muraro, D., Thielen, J., and Pappenberger, F. GloFAS – global ensemble streamflow forecasting and flood forecastingHydrol. Earth Syst. Sci., 17, 1161-1175, doi:10.5194/hess-17-1161-2013, 2013.