Retrieve next 5 days forecast.

async def forecast(self, globalIdLocal):
        """Retrieve next 5 days forecast."""

        data = await self.retrieve(API_FORECAST + "{globalIdLocal}.json".
                                   format(globalIdLocal=globalIdLocal))

        if not self.weather_type:
            await self.weather_type_classe()

        if not self.wind_type:
            await self.wind_type_classe()

        _forecasts = []
        for forecast in data['data']:
            Forecast = namedtuple('Forecast', list(forecast.keys())+['description'])
            _description = self.weather_type[forecast['idWeatherType']]
            if forecast['classWindSpeed'] != -99.0:
                _description += ", com vento "+ self.wind_type[forecast['classWindSpeed']] +\
                                " de " + WIND_DIRECTION[forecast['predWindDir']]
            vals = [self._to_number(v) for v in forecast.values()] + [_description]
            _forecasts.append(Forecast(*vals))
        return _forecasts