Abstract

                                Astrometeorology is a great science and gift from our ancestors known to humankind. Compared to statistical and numerical methods of forecasting, astrometeorology method has no time restrictions and weather could be forecasted for the next hour to a date far in the future. Wind speed is the weather parameter plays an important role in crop production. A study on the relationship between the wind speed events and the planet’s azimuth was conducted at Tamil Nadu Agricultural University during 2017-18 as a part of the formulation of astrometeorological rules for wind speed events. Hourly wind speed observed between 2011 and 2016 from each one location from 31 districts of Tamil Nadu were correlated with the ephemeris developed for the same period in Alcyone ephemeris calculator. It could be concluded from the correlation study on individual planet azimuth and wind speed events that the azimuth range of 61 – 120 of all the planets and 240 – 300 had a good influence on wind speed. The 61 – 90 degrees azimuth of the Sun, Mercury, Saturn and Neptune had good influence on calm to light air wind speed events (0 – 12 km). The 91 – 120 degrees azimuth of all the planets had influenced moderately to heavy wind (19 – 45 km/hour). The Moon, Mars, Jupiter, and Neptune at 60 - 90 degrees azimuth had influenced the extreme wind speed events. The Moon, Mars and Saturn at 271 – 300 degrees azimuth had influenced the moderate to heavy wind (19 – 45 km/ hour)

Key words : : Astrometeorology, Wind speed, Planets Azimuth, Conjunction