Narrative:

During arrival into dfw, several areas of level 3+ thunderstorms were in the vicinity of the airport. While being vectored off the acton 2 arrival for the approach, we encountered moderate turbulence below the clouds. A large level 3+ cell was located some 10 mi north of the field moving north. Another cell was about 3 mi south of the field moving north, with showers and virga in between the 2 cells. ATIS reported the wind at 020/3 with visibility approachs to the south. The copilot briefed the approach to 13R and I commented we would go around if we didn't like the situation. We were following an air carrier large transport for 13R. After we reported traffic in sight, approach handed us off to tower. Tower issued landing clearance and advised us to use caution for wake turbulence. Wind was stated to be 320/9. I asked the tower for any wind shear reports and she said there were non; however, the west field boundary reported 340/19 with the tower reporting 320/8. Since the copilot was newly qualified, I decided to fly and briefed the landing to be a flaps 50% for wind shear. Inside the OM, the air carrier reported a loss of 10 KTS at 150' AGL. I decided to fly ret +2- and advised the copilot. Upon crossing the threshold of 13R, we encountered a 20-30 KT windshear. A normal landing was made. However, I estimate we had a tailwind of about 20 KTS, although the tower was still reporting a wind of 9 KTS from the northwest. I feel that if an anemometer was located at the approach end of the runway, and the crew was advised of the wind condition for that runway, a situation like this could be avoided. This system could be like RVR reports in helping flight crews assess runway conditions for a specific runway and not have to rely on tower conditions sometimes located miles away from the runway.

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Original NASA ASRS Text

Title: COMMUTER SMT WIND SHEAR ENCOUNTER AND LNDG WITH 20 KT TAILWIND.

Narrative: DURING ARR INTO DFW, SEVERAL AREAS OF LEVEL 3+ TSTMS WERE IN THE VICINITY OF THE ARPT. WHILE BEING VECTORED OFF THE ACTON 2 ARR FOR THE APCH, WE ENCOUNTERED MODERATE TURB BELOW THE CLOUDS. A LARGE LEVEL 3+ CELL WAS LOCATED SOME 10 MI N OF THE FIELD MOVING N. ANOTHER CELL WAS ABOUT 3 MI S OF THE FIELD MOVING N, WITH SHOWERS AND VIRGA IN BTWN THE 2 CELLS. ATIS RPTED THE WIND AT 020/3 WITH VIS APCHS TO THE S. THE COPLT BRIEFED THE APCH TO 13R AND I COMMENTED WE WOULD GO AROUND IF WE DIDN'T LIKE THE SITUATION. WE WERE FOLLOWING AN ACR LGT FOR 13R. AFTER WE RPTED TFC IN SIGHT, APCH HANDED US OFF TO TWR. TWR ISSUED LNDG CLRNC AND ADVISED US TO USE CAUTION FOR WAKE TURB. WIND WAS STATED TO BE 320/9. I ASKED THE TWR FOR ANY WIND SHEAR RPTS AND SHE SAID THERE WERE NON; HOWEVER, THE W FIELD BOUNDARY RPTED 340/19 WITH THE TWR RPTING 320/8. SINCE THE COPLT WAS NEWLY QUALIFIED, I DECIDED TO FLY AND BRIEFED THE LNDG TO BE A FLAPS 50% FOR WIND SHEAR. INSIDE THE OM, THE ACR RPTED A LOSS OF 10 KTS AT 150' AGL. I DECIDED TO FLY RET +2- AND ADVISED THE COPLT. UPON XING THE THRESHOLD OF 13R, WE ENCOUNTERED A 20-30 KT WINDSHEAR. A NORMAL LNDG WAS MADE. HOWEVER, I ESTIMATE WE HAD A TAILWIND OF ABOUT 20 KTS, ALTHOUGH THE TWR WAS STILL RPTING A WIND OF 9 KTS FROM THE NW. I FEEL THAT IF AN ANEMOMETER WAS LOCATED AT THE APCH END OF THE RWY, AND THE CREW WAS ADVISED OF THE WIND CONDITION FOR THAT RWY, A SITUATION LIKE THIS COULD BE AVOIDED. THIS SYS COULD BE LIKE RVR RPTS IN HELPING FLT CREWS ASSESS RWY CONDITIONS FOR A SPECIFIC RWY AND NOT HAVE TO RELY ON TWR CONDITIONS SOMETIMES LOCATED MILES AWAY FROM THE RWY.

Data retrieved from NASA's ASRS site as of July 2007 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.