Narrative:

We were the first aircraft cleared for takeoff after snow removal. Tower reported RVR 2800 ft and cleared us for takeoff. Approaching V1 the tower canceled our takeoff clearance. I could see nothing on the runway and determined it was safer to continue the takeoff than perform a high speed reject. I informed the first officer we would continue; and he told the tower unable. We continued with a normal takeoff. In the air; the tower asked if we saw anything on the runway. The first officer replied negative and the tower indicated a probable equipment malfunction. I assume he meant ground radar.the reason I did not reject the takeoff was that we were high speed and I had good visibility down the runway at least 3/4 of a mile. I saw nothing on the runway. In my takeoff briefings; I brief takeoff rejects for engine failure; fire; windshear; and aircraft unsafe to fly. A cancelled takeoff clearance should also be included; but the speed and situation are factors for the reject.

Google
 

Original NASA ASRS Text

Title: Air Carrier Captain departing on freshly snowplowed runway had takeoff clearance canceled. The Captain elected to continue takeoff for safety reasons with no hazards visible on the runway.

Narrative: We were the first aircraft cleared for takeoff after snow removal. Tower reported RVR 2800 ft and cleared us for takeoff. Approaching V1 the Tower canceled our takeoff clearance. I could see nothing on the runway and determined it was safer to continue the takeoff than perform a high speed reject. I informed the First Officer we would continue; and he told the Tower unable. We continued with a normal takeoff. In the air; the Tower asked if we saw anything on the runway. The First Officer replied negative and the Tower indicated a probable equipment malfunction. I assume he meant ground radar.The reason I did not reject the takeoff was that we were high speed and I had good visibility down the runway at least 3/4 of a mile. I saw nothing on the runway. In my takeoff briefings; I brief takeoff rejects for engine failure; fire; windshear; and aircraft unsafe to fly. A cancelled takeoff clearance should also be included; but the speed and situation are factors for the reject.

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.