Why is my closure not executing in time with each loop iteration? - node.js

Question

buses_near_stops begins as an empty array. Inside the asynchronous calls to the database, it is supposed to be filled. Then after the calls finish, I want to use the data inside of it. When I run this code, the final console log of buses_near_stops executes before the inner database calls, even though I have the looped calls inside of a closure. According to this post, a closure should work, but here it is doing nothing for me.
var buses_near_stops = [];
buses_near_stops.test = "TEST";
// return these fields of each location document in the database
Location.find({}, 'service_name coordinates vehicle_id last_gps_fix', function(err, doc) {
//console.log('location found ' + JSON.stringify(doc));
if(err){return next(err);}
doc.forEach(function(j,k) {
//Find a stop that is near enough to each given bus that we can say the bus is 'at' that stop
//Making sure it returns 1 stop now because I don't know proper distance
(function(buses_near_stops) {
Stop.findOne({coordinates: { $near : j.coordinates, $maxDistance: .0001}
}, function(err, stop){
if(err){return next(err);}
console.log('stop found ' + j.service_name + " " + JSON.stringify(stop));
// service_name is null if bus is out of service (I believe)
if(stop !== null && j.service_name !== null) {
var service_name_of_bus = j.service_name;
console.log('service name of bus ' + service_name_of_bus);
// Find the service document associated with service_name_of_bus
var service_of_name = Service.findOne({name: service_name_of_bus}, function(err, service_of_name){
if(err){return next(err);}
// If the service has 'stop' on its route
if(service_of_name != null && service_of_name.routes[0].stops.indexOf(stop.stop_id) > -1) {
console.log('stop found on service');
// We have now found a bus that is stopped at a stop on its route
console.log('test ' + buses_near_stops.test);
buses_near_stops.push(
{
time: j.last_gps_fix,
bus_coords: j.coordinates,
stop_coords: stop.coordinates,
vehicle_id: j.vehicle_id,
stop_id: stop.stop_id,
service_name: service_name_of_bus
});
console.log('length ' + buses_near_stops.length);
}
});
}
})}(buses_near_stops));
});
console.log('buses near stops ' + JSON.stringify(buses_near_stops));
});