VayuMet is a free, open-access meteorological data platform built for India — delivering district-level weather forecasts, seasonal monsoon outlooks, aviation weather, agriculture weather intelligence, renewable energy planning data and air quality visualisations, all powered by global numerical weather prediction (NWP) models.
Founded and led by an Indian Air Force veteran with over 34 years of operational experience in aviation meteorological services — bringing a depth of professional credibility that is rare among open weather data platforms.
6-hourly and cumulative precipitation maps at ~25 km resolution across India, updated every 6 hours.
Animated wind at 10 m, 100 m, 850 hPa, 500 hPa, 300 hPa and 200 hPa — from surface to jet stream level.
Month-by-month precipitation and temperature anomaly maps at district and state level for the current monsoon season, sourced from CFSv2.
Real-time METARs, TAFs, SIGMETs, flight category overlays, icing and turbulence indices across Indian airspace.
PM2.5, PM10, AOD, dust AOD, and derived visibility indices using ECMWF-CAMS-Aerosols output.
Solar irradiance (GHI/DNI) (To be Added in Future), wind power potential at 100 m hub height, and sunshine duration maps for wind and solar energy site planning and generation forecasting.
Sowing-season rainfall outlooks, cumulative precipitation tracking, soil temperature proxies, frost risk alerts and harvest-period forecast summaries to support India's farming and food-security planning at district level.
VayuMet does not generate its own forecasts. We download, process and visualise output from publicly available, authoritative NWP model runs operated by NOAA (National Oceanic and Atmospheric Administration), USA.
| Model | Operator | Use in VayuMet | Resolution | Update Cycle |
|---|---|---|---|---|
| GFS (Global Forecast System) | NOAA / NCEP | Short-range weather: rain, wind, temperature, clouds, humidity | 0.25° | 4× daily (00Z, 06Z, 12Z, 18Z) |
| CFSv2 (Climate Forecast System v2) | NOAA / NCEP | Seasonal forecasts: precipitation & temperature anomalies | 1.0° | 4× daily, monthly outlooks |
| ECMWF-CAMS-Aerosols | ECMWF | Air quality: PM2.5, PM10, AOD, dust | 0.25° | daily |
| AWC (Aviation Weather Center) | NOAA | METARs, TAFs, SIGMETs, PIREPs | Station-based | Real-time |
Data Transparency: All model data is sourced from NOAA's public data servers and processed under open-data terms. VayuMet applies post-processing, regridding, and visualisation — we do not modify or bias-correct the underlying NWP output.
Raw GFS GRIB2 files are downloaded from NOAA's NOMADS server, regridded to a uniform India bounding box (30°E–130°E, 5°S–50°N), and exported as GeoTIFF files. The GeoTIFFs are served directly to the browser, where a custom WebGL renderer applies colour ramps and overlays the data on an interactive Leaflet map.
Monthly Climate Forecasting System ensemble output is bias-corrected against IMD reference climatology and then spatially joined to India's district and state boundaries. The result is a district-level anomaly map (precipitation in %, temperature in °C departure) updated monthly for the June–October monsoon season window.
U and V wind components at each pressure level are extracted from GFS output and converted to Leaflet-Velocity JSON format, enabling smooth particle-flow animation in the browser without server-side rendering.
Not for Safety-Critical Use: VayuMet is intended for situational awareness and planning. It should not be used as the sole basis for safety-critical decisions. Consult the India Meteorological Department (IMD) and official aviation authorities for operational use.
VayuMet is founded and led by an Indian Air Force veteran whose career spans over three decades of hands-on operational aviation meteorology, large-scale organisational leadership, policy formulation, technology adoption and professional education. This is not a hobbyist project — it is built on the kind of domain authority that comes only from sustained frontline service at the highest levels of India's defence meteorological establishment.
This operational depth — spanning frontline aviation weather services, strategic policy leadership, large-scale personnel management, sensor technology expertise, and meteorological education — directly shapes VayuMet's design philosophy: aviation-grade rigour, transparent data sourcing, and practical usability for Indian conditions.
Our processing pipeline references methodologies and standards published by NOAA, ECMWF, IMD, and the Indian Institute of Tropical Meteorology (IITM).
We welcome feedback, data correction reports, and collaboration enquiries from researchers, meteorologists and developers.
📧 Email: info@vayumetweather.com
🌐 Website: www.vayumetweather.com
Open VayuMet Live Maps →