Peter Duniho wrote:

After a minute or so, the airspeed indicator returned to its previous
value.
It took you a full minute to recover 15 knots? That doesn't sound right.

Or so... Not having a running stopwatch, I was SWAGing the time based
on my recollection of a flight about a week ago. How long does it
typically take to recover airspeed after encountering wind shear (note
spelling).

Once I leveled off, I called flight service and reported it. However,
is this really report-worthy? The reason for my question is the
relatively higher altitude at which I encountered the windsheer.

Sure, it's report-worthy. Wind shear (please note spelling)

LOL! Demonstrates that the golf umbrella is more entrenched in my
vocabulary than the weather phenomenon.

--
Peter