MYSQL SELECT most recent of id and ORDER BY - mysql

Question

What I am trying to do is get the most recent result for each resort_id and then ORDER BY snow_depth. The first two parts I have managed. The ordering is the part that doesn't work.
What I have so far
SELECT * FROM snow_conditions t1
NATURAL JOIN ( SELECT MAX(weather_id) AS weather_id, resort_id FROM snow_conditions
GROUP BY resort_id ) t2
ORDER BY snow_depth DESC
weather_id is auto incremented, so I use it instead of save_time to reduce calculation resource.
The thing that is confusing me is the result comes out in some weird partial order of snow_depth.
+-----------+------------+------------+
| resort_id | weather_id | snow_depth |
+-----------+------------+------------+
| 888 | 827 | 90 |
| 943 | 835 | 90 |
| 860 | 839 | 75 |
| 17 | 828 | 71 |
| 26 | 826 | 70 |
| 9 | 852 | 60 |
| 16 | 831 | 292 |
| 296 | 862 | 170 |
| 20 | 843 | 168 |
| 5 | 842 | 165 |
| 36 | 838 | 160 |
| 17 | 17 | 0 |
| 26 | 26 | 0 |
+-----------+------------+------------+
When really it should appear like this
+-----------+------------+------------+
| resort_id | weather_id | snow_depth |
+-----------+------------+------------+
| 16 | 831 | 292 |
| 296 | 862 | 170 |
| 20 | 843 | 168 |
| 5 | 842 | 165 |
| 36 | 838 | 160 |
| 888 | 827 | 90 |
| 943 | 835 | 90 |
| 860 | 839 | 75 |
| 17 | 828 | 71 |
| 26 | 826 | 70 |
| 9 | 852 | 60 |
| 17 | 17 | 0 |
| 26 | 26 | 0 |
+-----------+------------+------------+
I have tried just about every relevant looking MySQL query I could find on here but they all encounter the same issue or don't work.
EDIT: I should mention this table contains thousands of rows, with hundreds of rows for each resort_id. It's done this way so I can use it to generate a snowfall history.

Answer 1

I think you should check your database for data type of snow_depth it should not be varchar. Your result sounds like it is varchar so if it is then change it to int or any numeric type

Answer 2

your result already sorted by snow_depth but the snow_depth column is varchar data type. change it or you can use this:
cast(snow_depth as unsigned) DESC
so, your all query should be:
SELECT * FROM snow_conditions t1
NATURAL JOIN ( SELECT MAX(weather_id) AS weather_id, resort_id FROM snow_conditions
GROUP BY resort_id ) t2
ORDER BY cast(snow_depth as unsigned) DESC