Narrative:

With LLWS, I asked the first officer to plan for an improved climb takeoff. We asked for runway 19L since the wind favored this runway the most. Reported wind at pushback was 160 degrees at 30 KTS. Tower reported a rainshower northwest of sfo moving toward the field. Rain began just prior to taking the active. After we began the takeoff roll, tower called the wind 41 KTS. At 400 ft, wind was increasing in the HUD readout through 60 KTS. With gear up, we initiated a left turn per the departure to heading 060 degrees. At 600 ft, we were hit full force with strong windshear, windshear warning sounded twice. I called to keep our confign. Passing through 1000 ft, indicated airspeed had increased to 260 KIAS. Aircraft pitched to over 30 degrees nose up with first officer trying to control it by pushing it over. Vvi showed pegged at 6000 FPM. Noticeable wind noise in the cockpit required us to raise our voices to hear each other. Aircraft was initially banked, but noticed now that wings were level and beginning to turn right. I called first officer to turn left, turned left and noted that he was 20-30 degrees left deflection on the control wheel, but the aircraft was banking the other way. At 3000-3500 ft, lost airspeed rapidly to 180 KTS. First officer noticed immediately reducing pitch. I called out airspeed, but the first officer struggled to get the nose down and the controls were difficult to make respond. He was stiff arming the controls and we were still losing airspeed nose high. We gave up turning, since we had finally cleared the high terrain off the end of runway 19L. Once clear of 5000 ft, flew straight ahead while experiencing at least 3 more +/-40-50 KT changes in airspeed. Moderate turbulence and windshear through 7000 ft. Wrote up flap overspd in the logbook.

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Original NASA ASRS Text

Title: B737 FLC ENCOUNTERS SEVERE WINDSHEAR DEPARTING SFO.

Narrative: WITH LLWS, I ASKED THE FO TO PLAN FOR AN IMPROVED CLB TKOF. WE ASKED FOR RWY 19L SINCE THE WIND FAVORED THIS RWY THE MOST. RPTED WIND AT PUSHBACK WAS 160 DEGS AT 30 KTS. TWR RPTED A RAINSHOWER NW OF SFO MOVING TOWARD THE FIELD. RAIN BEGAN JUST PRIOR TO TAKING THE ACTIVE. AFTER WE BEGAN THE TKOF ROLL, TWR CALLED THE WIND 41 KTS. AT 400 FT, WIND WAS INCREASING IN THE HUD READOUT THROUGH 60 KTS. WITH GEAR UP, WE INITIATED A L TURN PER THE DEP TO HDG 060 DEGS. AT 600 FT, WE WERE HIT FULL FORCE WITH STRONG WINDSHEAR, WINDSHEAR WARNING SOUNDED TWICE. I CALLED TO KEEP OUR CONFIGN. PASSING THROUGH 1000 FT, INDICATED AIRSPD HAD INCREASED TO 260 KIAS. ACFT PITCHED TO OVER 30 DEGS NOSE UP WITH FO TRYING TO CTL IT BY PUSHING IT OVER. VVI SHOWED PEGGED AT 6000 FPM. NOTICEABLE WIND NOISE IN THE COCKPIT REQUIRED US TO RAISE OUR VOICES TO HEAR EACH OTHER. ACFT WAS INITIALLY BANKED, BUT NOTICED NOW THAT WINGS WERE LEVEL AND BEGINNING TO TURN R. I CALLED FO TO TURN L, TURNED L AND NOTED THAT HE WAS 20-30 DEGS L DEFLECTION ON THE CTL WHEEL, BUT THE ACFT WAS BANKING THE OTHER WAY. AT 3000-3500 FT, LOST AIRSPD RAPIDLY TO 180 KTS. FO NOTICED IMMEDIATELY REDUCING PITCH. I CALLED OUT AIRSPD, BUT THE FO STRUGGLED TO GET THE NOSE DOWN AND THE CTLS WERE DIFFICULT TO MAKE RESPOND. HE WAS STIFF ARMING THE CTLS AND WE WERE STILL LOSING AIRSPD NOSE HIGH. WE GAVE UP TURNING, SINCE WE HAD FINALLY CLRED THE HIGH TERRAIN OFF THE END OF RWY 19L. ONCE CLR OF 5000 FT, FLEW STRAIGHT AHEAD WHILE EXPERIENCING AT LEAST 3 MORE +/-40-50 KT CHANGES IN AIRSPD. MODERATE TURB AND WINDSHEAR THROUGH 7000 FT. WROTE UP FLAP OVERSPD IN THE LOGBOOK.

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.