River warnings#
The river warnings product cross-references the cumulative precipitation forecast values over the contributing area of each pixel with IDF (Intensity-Duration-Frequency) tables to provide forecasts at the river pixels in terms of return period.
These warnings are useful to anticipate floods in small and medium-sized river channels (up tp 1.000 km2) and to generate early warnings on vulnerable features located close to the channels.
Calculation#
The algorithm used for the calculation has been developed by the Centre de Recerca Aplicada en Hidrometeorologia (CRAHI) of the Universitat Politècnica de Catalunya (UPC).
Corral, C., D. Velasco, D. Forcadell, and D. Sempere-Torres, 2009: Advances in radar-based flood warning systems. The EHIMI system and the experience in the Besòs flash-flood pilot basin. In: Flood Risk Management: Research and Practice, P. Samuels, S. Huntington, W. Allsop, and J. Harrop, Eds., Taylor & Francis, 1295-1303.
Useful links#
SMC Radar - River warnings#
Warnings generated using the radar network of the Servei Meteorològic de Catalunya (SMC).
Temporal resolution#
The last 6 hours of observed data and 2 hours of forecasted data can be explored, with a time step of 6 minutes.
The units are return periods (years).
Update frequency#
Data are updated in real time. A new forecast is run each time a new radar image is acquired, approximately every 6 minutes.
Data sources#
The SMC radar network is used.
AEMET Radar - River warnings#
Warnings generated using the radar network of the Agencia Estatal de Meteorología (AEMET).
Temporal resolution#
The last 6 hours of observed data and 2 hours of forecasted data can be explored, with a time step of 10 minutes.
The units are return periods (years).
Update frequency#
Data are updated in real time. A new forecast is run each time a new radar image is acquired, approximately every 10 minutes.
Data sources#
The AEMET radar network is used.
Met Éireann Radar - River warnings#
Temporal resolution#
The last 6 hours of observed data and 2 hours of forecasted data can be explored, with a time step of 5 minutes.
The units are return periods (years).
Update frequency#
Data are updated in real time. A new forecast is run each time a new radar image is acquired, approximately every 5 minutes.
Data sources#
The Met Éireann radar network is used.