Updating models in controllers with AJAX Angular JS

I am sure this is an easy answer but I am not finding it anywhere. Essentially I have a $http service that brings back a JSON object with a ton of data that I need to use like so:

(function (angular) {
    angular.module("forecasting").factory("DataServices", ["$http", function ($http) {
        return {
            //get forecast of entity
            getForecast: function (callback) {
                $http({
                    method: "GET",
                    url: Forecasting.urls.entityAPIRoot + "forecast/1722"
                }).success(function (data, status, headers, config) {
                    callback(data);
                }).error(function (data, status, headers, config) {
                    callback(data);
                });
            }
        }
    });
} (angular));

This is just a service that takes a call back so the data can be saved to the scope like so:

DataServices.getForecast(function (data) {
    $scope.forecast = data;
});

This works well when trying to show the data in the view, it updates like you think it would. However simply trying console.log($scope.forecast) placed after the above code in my controller does not work.

I want to be able to take subsections of the data so I can use it in my app, however, I can't access $scope.forecast so I am not sure how I am able to.

I have looked at other solutions that use $scope.$apply() and promises. I am just kind of lost and not sure where to go from here.

How do I access a subset of the data being saved to the $scope outside of the callback?