Narrative:

Windshear to 31C at mdw; the approach was conducted to 31C with continuous moderate turbulence on the final approach this was also issued by mdw tower. At approximately 300 ft AGL; we encountered an approximate 30 knot loss of indicated airspeed. The onboard windshear alert system issued aural and red windshear caption displayed on the eadi (electronic attitude display indicator) and ehsi (electronic horizontal situation indicator). We conducted a windshear escape maneuver; I notified mdw tower of the windshear and returned to 31C for a normal landing with the same moderate turbulence on final approach. During the go around; there were two aircraft that landed after us and neither one was issued a reported windshear alert by the mdw tower. This lack of information for safety of flight not being passed along by the tower really got my attention. After parking at the gate; I made one attempt to query the controller about the lack of windshear information being passed along to the following aircraft. I decided to call the mdw tower when I made it to my hotel room. Once in my hotel room; I called mdw tower to speak to a supervisor; the controller I spoke to never would give me his name. I expressed my concern to him; in the name of safety; about the tower controller not advising the two following aircraft that we had gone around due to windshear. We spoke for about 15 minutes about this matter and his reply to me was that they had to have detailed information before issuing a windshear encounter; i.e. Specific altitude; airspeed loss; etc. I didn't realize this was a prerequisite; by ATC to issue a windshear encounter by a previous aircraft. Frankly; I was startled along with my first officer and busy trying to fly the aircraft and not able to provide specifics to the controller at the exact moment the event took place. I feel that it is enough information; by itself; to pass along that a previous aircraft encountered windshear on short final. The event occurred due to excessive and unexpected winds on short final.

Related reports:

Google
 

Original NASA ASRS Text

Title: Air Carrier Captain reported encountering windshear at MDW; resulting in an escaped manuver. Reporter was concerned ATC did not supply information to following aircraft.

Narrative: Windshear to 31C at MDW; the approach was conducted to 31C with continuous moderate turbulence on the final approach this was also issued by MDW Tower. At approximately 300 FT AGL; we encountered an approximate 30 knot loss of indicated airspeed. The onboard windshear alert system issued aural and red windshear caption displayed on the EADI (Electronic Attitude Display Indicator) and EHSI (Electronic Horizontal Situation Indicator). We conducted a windshear escape maneuver; I notified MDW Tower of the windshear and returned to 31C for a normal landing with the same moderate turbulence on final approach. During the go around; there were two aircraft that landed after us and neither one was issued a reported windshear alert by the MDW Tower. This lack of information for safety of flight not being passed along by the Tower really got my attention. After parking at the gate; I made one attempt to query the Controller about the lack of windshear information being passed along to the following aircraft. I decided to call the MDW Tower when I made it to my hotel room. Once in my hotel room; I called MDW Tower to speak to a Supervisor; the Controller I spoke to never would give me his name. I expressed my concern to him; in the name of safety; about the Tower Controller not advising the two following aircraft that we had gone around due to windshear. We spoke for about 15 minutes about this matter and his reply to me was that they had to have detailed information before issuing a windshear encounter; i.e. specific altitude; airspeed loss; etc. I didn't realize this was a prerequisite; by ATC to issue a windshear encounter by a previous aircraft. Frankly; I was startled along with my First Officer and busy trying to fly the aircraft and not able to provide specifics to the Controller at the exact moment the event took place. I feel that it is enough information; by itself; to pass along that a previous aircraft encountered windshear on short final. The event occurred due to excessive and unexpected winds on short final.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.