Narrative:

While flight following; I kept them informed as much as I could have with the current weather situation going on in las. Las was landing 19L/right and 25L until about 20 minutes before the crew of [the] flight started their approach to final. I advised the crew they should expect possible holding due to gusting winds and they need to turn the airport around to landing on 1L configuration. During this time las had about 7-8 aircraft land in front of my crew; with no issues of windshear/turbulence on final. I can make this claim because I was monitoring liveatc.net listening to las as an advisory tool to monitor the situation going on in las. The crew stated they were being told by ATC to keep their speed up to avoid compression with other aircraft on final as las turn the airport around. As the crew was getting the aircraft ready for approach this speed restriction helped lead up to a flaps overspeed; that lasted for one second. The crew was flying at 190 KIAS with a consistent 10 knot tailwind; then once hitting 5;000 feet they experienced a 235 KIAS speed increase as they already had dropped the flaps to flaps 10. The flaps retracted to flaps five and the crew had to regain the airspeed to maintain flaps 10 and slow the aircraft back down. There were no injuries or damage to the aircraft.after speaking with my crew on the phone; I could tell they were upset and shaken up by the incident. The crew said he felt there was nothing he could have done to avoid the unexpected windshear that caused the flap overspeed. The captain informed me a flight in front of him and the aircraft behind him all had a similar experience. He felt ATC should not have been giving speed restrictions with thunderstorms in the vicinity of the airport. I agreed. I also feel the crew could have rejected the speed restriction and told ATC they were unable to maintain a faster speed due to the weather.

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Original NASA ASRS Text

Title: A Dispatcher reported a B737NG on approach to LAS Runway 25 in thunderstorm conditions; experienced a flap overspeed when the airspeed suddenly increased from 190 KTS to 235 KTS at flaps 10. ATC had issued no windshear/turbulence alerts.

Narrative: While flight following; I kept them informed as much as I could have with the current weather situation going on in LAS. LAS was landing 19L/R and 25L until about 20 minutes before the crew of [the] flight started their approach to final. I advised the crew they should expect possible holding due to gusting winds and they need to turn the airport around to landing on 1L configuration. During this time LAS had about 7-8 aircraft land in front of my crew; with no issues of windshear/turbulence on final. I can make this claim because I was monitoring liveatc.net listening to LAS as an advisory tool to monitor the situation going on in LAS. The crew stated they were being told by ATC to keep their speed up to avoid compression with other aircraft on final as LAS turn the airport around. As the crew was getting the aircraft ready for approach this speed restriction helped lead up to a flaps overspeed; that lasted for one second. The crew was flying at 190 KIAS with a consistent 10 knot tailwind; then once hitting 5;000 feet they experienced a 235 KIAS speed increase as they already had dropped the flaps to flaps 10. The flaps retracted to flaps five and the crew had to regain the airspeed to maintain flaps 10 and slow the aircraft back down. There were no injuries or damage to the aircraft.After speaking with my crew on the phone; I could tell they were upset and shaken up by the incident. The crew said he felt there was nothing he could have done to avoid the unexpected windshear that caused the flap overspeed. The Captain informed me a flight in front of him and the aircraft behind him all had a similar experience. He felt ATC should not have been giving speed restrictions with thunderstorms in the vicinity of the airport. I agreed. I also feel the crew could have rejected the speed restriction and told ATC they were unable to maintain a faster speed due to the weather.

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.