What happens when I assign an out-of-range value to a short int in C?

Question

I know the range of short is from 32767 to -32768 on most systems. But when I try to assign 32787 I see something different.

#include <stdio.h>
int main ()
{
   short int a;
   a = 32787;
   printf("%hi\n",a);
}

Output:

-32749

This value actually my value + minimum short value + minimum short value and not some random value. (32787 + (-32768)) + (-32768) = -32749

This is the first case I try to assign a high value to short int I will get warning from GCC I get some value.

This makes the results completely incomprehensible. Does anyone know what's going on here?