Beteljuices Zambretti Algorhithm based Forecaster - v1.0 Enter Data Environment: Hemisphere: North South   'Wx Range':   Low:  High: Current Variables: Wind conditions: Calm N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW   Month: January February March April May June July August September October November December Baro: (Relative / Sea Level Adjusted) (hPa / mb):    Trend: Steady Rising Falling   12 Hour Forecast: Your forecast will appear here Best done at 09:00 local solar time

This page is a simple input / output form for a Javascript version of the the 1915 Negretti and Zambra (Zambretti) weather forecaster. The original was designed for the Northern Hemisphere and UK 'Weather Range'. ie. The nearer the Poles the greater the spread between lower and upper barometer levels and large 'trends' are needed for weather conditions change. Conversely, the nearer the Equator the smaller the 'spread' and smaller 'trends' for change. Hopefully I have correctly re-written the algorithm to allow for any location, and I have also increased 'wind direction' to 16 points to make it compatable with most wx kit. A forecast at approx. 09:00 local Solar Time is allegedly better than 90% accurate ! - even though it takes no account of rate of barometer change, wind speed or temperature. This code is free for all, including redistribution, as long as NO CHARGE is ever made for it's use or output. beteljuice - June 2008