Bill J wrote in
:

Yesterday I was on an IFR flight about 50 miles from destination. The
area was getting covered with TS, including my alternate 20 miles
futher west. Home base was 150 mi to the east. I realized I might have
to reverse course to escape, but did not have enough fuel to get home
for sure.

So, the last chance to land before the TS got heavy was coming close.
When about 15 miles from this new "alternate" I told controller I
wanted to change destination. I expect a vector to the final, and I
was needing to start descent. Nothing happened. Finally when maybe 5
miles out, and way to close to get a vector, controller quizzed me
with "I need to know what is the reason for the change in
destination??"

From the tone of voice I could tell I caused him a problem. The
traffic
was not heavy. I have never had anyone question a change like that.
When over the airport VMC opened up briefly, I cancelled and landed.
Wondering what might have caused the query.


I suspect you were too close to the airport for vectoring or there might
have been a traffic conflict. On my initial request to the controller, I
would have said "request landing at XYZ due to weather".