Hydrological Products
Product name | Description (established over forecast horizon) | Outputs | Forecast Horizon | Hydrological Models | |
| Medium-range | Reporting Points | Reporting points where more forecast information is available. Purple/red/yellow points denote river catchment outlets where the forecasted probability to exceed the 20-year (purple) / 5-year (red) / 2-year (yellow) return periods is at least 20%. Numbers denote the probability values (percentage of ensemble members exceeding the specific return period). Shape of the markers denotes rising (upward triangle), decreasing (downward triangle), or stagnant (circle) trend of the ensemble mean discharge within the 30-day forecast horizon. The grey squares represent reporting points with no flood signal, i.e. less than 20% probability for exceeding the 2-year return levels. | Map | 30 days | |
Short-range Medium-range Extended Range | Flood summary for days 1-3 | The flood summary map combines the 2-, 5- and 20-year exceedance probabilities into a category-based information. It shows where the ENS-max (maximum of the ensemble mean discharge) for forecast days 1-3 (4-10 or 11-30 for the other two versions) is >20-year (purple) / 5-20-year (red) / 2-5-year (dark yellow) return period level. Light yellow indicates where the ENS-max is below the 2-year return period value, but there is noticeable probability (>20%) for exceeding the 2-year return period level.
| Map | 30 days | |
|---|---|---|---|---|---|
Flood summary for days 4-10 | |||||
Flood summary for days 11-30 | |||||
| Seasonal range | Seasonal Outlook - Reporting Points | Reporting points where ensemble hydrographs and probability (persistence) tables for the high (> 80th percentile) and low (< 20th percentile) flow categories are available, displaying the river flow forecast out to 4 months. Please note: The user is advised to evaluate forecast skill for their particular application. | Map Hydrographs | 16 weeks (4 months) | |
| Seasonal range | Seasonal Outlook - River Network | Maximum probability [%] of high (> 80th percentile) or low (< 20th percentile) river flow during the 4 month forecast horizon. Please note: The user is advised to evaluate forecast skill for their particular application. | Map | 16 weeks (4 months) | |
| Seasonal range | Seasonal Outlook - Basin Overview | Maximum probability [%] of high (> 80th percentile) or low (< 20th percentile) river flow during the 4 month forecast horizon, provided for 305 global basins. Please note: The user is advised to evaluate forecast skill for their particular application. | Map | 16 weeks (4 months) | |
| Extended Range | 5 Year Return Period Exceedance | Probability of ensemble streamflow predictions [%] to exceed a 5-year return period discharge level. | Map | 30 days | |
| Extended Range | 20 Year Return Period Exceedance | Probability of ensemble streamflow predictions [%] to exceed a 20-year return period discharge level. | Map | 30 days |
