Flood and alert map
Real-time interactive map with reservoirs, SAIH flow rates, AEMET warnings, and T10/T100/T500 flood-prone zones on a Ventusky-style dark basemap.
Open advanced mapFree calculators for professionals, students, and the curious: streamflow in channels, flood risk, unit converter, and monthly water balance.
Real-time interactive map with reservoirs, SAIH flow rates, AEMET warnings, and T10/T100/T500 flood-prone zones on a Ventusky-style dark basemap.
Open advanced mapCalculate flow rate in channels and rivers using the Manning formula with rectangular, trapezoidal, or circular cross sections.
Open toolEstimate, as a guideline, the flood risk of a location based on rainfall, distance to the riverbed, elevation, and SNCZI zoning.
Open toolConvert wind speed, precipitation, temperature, pressure, flow rate, and reservoir volume in real time.
Open toolCalculate monthly PET and water balance (P-PET) with presets for Spanish cities and an SVG P/PET chart.
Open toolWatch real-time conditions from hundreds of beach, mountain, reservoir and city webcams across Spain and Europe.
Watch webcamsWave height, period, direction and sea temperature for 100+ beaches. Made for surfers, sailors and sport fishing.
View seaCompare forecasts from the major numerical models (GFS, ICON, ECMWF) side by side. Find the most reliable one.
CompareAnimated wind, temperature, pressure, waves, clouds, lightning and more. 12 layers with 10-day forecast (Ventusky/Windy style).
Open mapThese calculators complement the real-time data on the HidroAlerta24 map. They let you size flow rates in drainage projects, quickly assess flood exposure, convert between common units in hydrology and meteorology, and characterize a region's climate through the monthly water balance.