I offered to take a Cherokee up to our MX base for an oil change today. Winds kicked up quite a bit even while I was doing my pre flight - gusting to 17kts with a 30-degree crosswind component. Within my safety margin. But when I started to taxi, an aircraft on final gave a windshear advisory of 20 kts. Tower reported that they had been getting windshear advisories the last hour.
With only five hours under my belt after 10 years away (230 TT) this pushed my safety margin a bit too far - I parked her and packed her up. Not second guessing my decision, but figured it was worth the question - is low level windshear of that strength enough of a threat to cancel a departure?