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Readme

weather-formulas

A library of atmospheric and weather related calculations.

Test code for all code/algorithms
Supports custom valuation sets where needed

Features

Temperature

Humidity

Pressure

Install

$ npm install weather-formulas

How to use

const WF = require('weather-formulas');

const TEMPERATURE = 300, HUMIDITY = 60, WINDSPEED = 10; //300 Kelvin, 60% Relative Humidity, 10 M/S

let dewPointMF = WF.dewPointMagnusFormula(TEMPERATURE, HUMIDITY);
let dewPointAF = WF.dewPointArdenBuckEquation(TEMPERATURE, HUMIDITY);
let windChill = WF.windChillIndex(TEMPERATURE, WINDSPEED);
let apparentTemperature = WF.australianAapparentTemperature(TEMPERATURE, HUMIDITY, WINDSPEED);
let heatIndex = WF.heatIndex(TEMPERATURE, HUMIDITY);
let heatIndexText = WF.heatIndexText(heatIndex); //output heat index threshold and warning text

let humidex = WF.humidex(TEMPERATURE, HUMIDITY);
let humidexText = WF.humidexText(humidex); //output humidex threshold and warning text

Advanced examples

Use a provided valuation set

const valuationSet =  temperature.DEW_POINT_VALUATIONS.DAVID_BOLTON;
const actual = temperature.dewPointMagnusFormula(TEMPERATURE, HUMIDITY, valuationSet);

Use a custom valuation set

const valuationSet =  { a: 6, b: 17, c: 250, d: 234.5 }; //these values are made up for the sake of example
const actual = temperature.dewPointArdenBuckEquation(TEMPERATURE, HUMIDITY, valuationSet);

Contribute

Please feel free to contribute by creating a Pull Request with test code.

Disclaimer

Always verify calculations before using in production as edge cases due to floating point errors may exists for large numbers, and that are not covered by tests today. Please report!