B737-700
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 104
Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Human Factors; Procedure; Weather
Arrival ATIS for ONT indicated light winds; ref +5. A new ATIS came out indicating an increase and a direction change; more northerly of ref +12.  On the first approach; we were held high because of GA traffic. When finally cleared for the visual; we were too high to continue.  I executed a missed approach at 3500 feet as the approach end of the runway disappeared under the nose. From over the mountains east of ONT; we had a continuous tailwind of around 30 knots. This missed approach had nothing to do with this event but is indicative of the changing wind conditions.After the missed approach; we were vectored to a left downwind for landing on 26R. After turning base; we were cleared for the visual and switched to Tower. Tower informed us that the wind was 300 at 30 knots down to 200 feet and previous aircraft had reported an airspeed gain at 200 feet to 500 feet and we were cleared to land.  We were configured; on speed; and stabilized at 1000 feet AGL. The approach continued without a problem and was relatively smooth. I was using the HUD and could see the crosswind vector.  It was about 20 to 30 knots. At about 200 feet; we did get an airspeed increase but not too bad.In close and in the flare; I could feel the tailwind. I do not recall the wind vector in the HUD.  After landing and exiting the runway; I told Tower that the wind didn't decrease at 200 feet. I asked for the current wind. Tower replied 020 at 30. I asked the First Officer (FO) to input that wind into the [computer]; which said we landed with a 22-knot tailwind; over twice the limitation.
A B737-700 Captain reported landing with a 22 knot tailwind component in rapidly changing weather conditions.