B737 flight crew reported rejecting takeoff after receiving a wind shear warning.

Attributes
ACN	1617642
Time
Date	201902
Local Time Of Day	1801-2400
Place
Locale Reference	ATL.Airport
State Reference	GA
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 302 Flight Crew Type 8500
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 346
Events
Anomaly	Ground Event / Encounter Other / Unknown Inflight Event / Encounter Weather / Turbulence

Narrative:

We were told to line up and wait on runway 8R and were told to be ready to go so that they could get more departures out. We got into position and then were cleared for takeoff. The aircraft ahead of us had just rotated and was airborne. We then began our takeoff. The first officer (first officer) called 80 knots and after that call we saw and heard the 'windshear ahead warning.' I rejected the takeoff and simultaneously told the first officer that we were rejecting. We informed tower immediately of our rejection on the runway. We then cleared off to the right and stopped on taxiway delta. I informed the passengers that we had rejected the takeoff due to a windshear warning and that the aircraft was under control. We ran the brake cooling numbers to determine if we could return to the gate or not. We could. I contacted the chief pilot and explained the situation. After taking a breath; we reviewed our procedures to see if we missed anything. I informed the passengers that we would be returning to the gate. At the gate; I talked to the chief pilot and maintenance. Additionally; I went to the cabin and spoke to the passengers face to face and explained what happened. After that; we were replaced and deadheaded back to ZZZ.

Original NASA ASRS Text

Title: B737 flight crew reported rejecting takeoff after receiving a wind shear warning.

Narrative: We were told to line up and wait on Runway 8R and were told to be ready to go so that they could get more departures out. We got into position and then were cleared for takeoff. The aircraft ahead of us had just rotated and was airborne. We then began our takeoff. The F/O (First Officer) called 80 knots and after that call we saw and heard the 'Windshear Ahead Warning.' I rejected the takeoff and simultaneously told the F/O that we were rejecting. We informed Tower immediately of our rejection on the runway. We then cleared off to the right and stopped on Taxiway Delta. I informed the passengers that we had rejected the takeoff due to a Windshear Warning and that the aircraft was under control. We ran the brake cooling numbers to determine if we could return to the gate or not. We could. I contacted the Chief Pilot and explained the situation. After taking a breath; we reviewed our procedures to see if we missed anything. I informed the passengers that we would be returning to the gate. At the gate; I talked to the Chief Pilot and Maintenance. Additionally; I went to the cabin and spoke to the passengers face to face and explained what happened. After that; we were replaced and deadheaded back to ZZZ.

Data retrieved from NASA's ASRS site 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.