Narrative:

On descent into las, approximately 30 mi southwest leveling off at 9000 ft MSL, flight experienced severe turbulence. Airspeed fluctuated from 160 KTS to over 250 KTS for approximately 15-20 seconds. Flight landed in las with no further incident. At the time there was a company low level area SIGMET for ca-or-identification-nv for occasional moderate chop/turbulence below FL180 to the surface. Although las station was not one of our stations listed in this SIGMET the crew had this information for the area involved. I feel, with the strong low level winds across the region, the event was isolated. In the future when there are strong winds I will look for and request PIREPS for the area flying into so as to provide the crew with the most up-to-date information.

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Original NASA ASRS Text

Title: A DISPATCHER'S RPT ON AN SF340 EXPERIENCING EXTREME AIRSPD VARIATIONS DURING AN ENCOUNTER WITH CLR AIR TURB AT 9000 FT NEAR LAS, NV.

Narrative: ON DSCNT INTO LAS, APPROX 30 MI SW LEVELING OFF AT 9000 FT MSL, FLT EXPERIENCED SEVERE TURB. AIRSPD FLUCTUATED FROM 160 KTS TO OVER 250 KTS FOR APPROX 15-20 SECONDS. FLT LANDED IN LAS WITH NO FURTHER INCIDENT. AT THE TIME THERE WAS A COMPANY LOW LEVEL AREA SIGMET FOR CA-OR-ID-NV FOR OCCASIONAL MODERATE CHOP/TURB BELOW FL180 TO THE SURFACE. ALTHOUGH LAS STATION WAS NOT ONE OF OUR STATIONS LISTED IN THIS SIGMET THE CREW HAD THIS INFO FOR THE AREA INVOLVED. I FEEL, WITH THE STRONG LOW LEVEL WINDS ACROSS THE REGION, THE EVENT WAS ISOLATED. IN THE FUTURE WHEN THERE ARE STRONG WINDS I WILL LOOK FOR AND REQUEST PIREPS FOR THE AREA FLYING INTO SO AS TO PROVIDE THE CREW WITH THE MOST UP-TO-DATE INFO.

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.