convertWind (windInMS, unit) {
		switch (unit) {
			case "beaufort":
				return this.beaufortWindSpeed(windInMS);
			case "kmh":
				return (windInMS * 3600) / 1000;
			case "knots":
				return windInMS * 1.943844;
			case "imperial":
				return windInMS * 2.2369362920544;
			case "metric":
			default:
				return windInMS;
		}
	}
Convert wind speed into another unit.
@param {number} windInMS the windspeed in meter/sec you want to convert
@param {string} unit can be 'beaufort', 'kmh', 'knots, 'imperial' (mph)
or 'metric' (mps)
@returns {number} the converted windspeed