A C152 INSTRUCTOR PLT IS UNABLE TO MAINTAIN CTL OF HER ACFT AT THE END OF THE XWIND LNDG ROLL AND IS BLOWN OFF A WET RWY AT TAXI SPD AT SUS; MO.

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THE EVENT OCCURRED AFTER A DAY; VFR; LCL TRAINING FLT IN A CESSNA 152; LNDG ON RWY 26R AT SUS; MO. AS WE RETURNED FROM OUR LCL TRAINING FLT WE RECEIVED ATIS INFO AND NOTED WINDS WERE FROM 190 DEGS AT 12 KTS GUSTING TO 21 KTS; A 70 DEG XWIND. IT HAD ALSO BEGUN TO RAIN. AFTER WE ENTERED THE TFC PATTERN TWR ADVISED WINDS HAD PICKED UP TO 190 DEGS AT 21 KTS GUSTING TO 29 KTS. THE WX FORECAST HAD NOT INDICATED THAT CONDITIONS WOULD DETERIORATE THAT MUCH. I HAD TAKEN THE CTLS AT THAT POINT AND WAS FULLY PREPARED TO GO AROUND AND DIVERT TO ANOTHER ARPT. WE LANDED SAFELY THOUGH; AND ON THE CTRLINE BUT AS I APPLIED THE BRAKES I REALIZED THAT THE NOW WET RWY AND WET BRAKES WERE NOT ALLOWING US TO SLOW DOWN. I RETRACTED THE FLAPS FROM THEIR PARTIAL SETTING AND MAINTAINED THE CTRLINE USING FULL XWIND CORRECTION. WE HAD SLOWED TO NORMAL TAXI SPD AND WERE APCHING A TXWY EXIT; WHEN A SUDDEN GUST OF WIND OR WIND PREVIOUSLY BLOCKED BY ADJACENT BUILDINGS; TURNED THE AIRPLANE SHARPLY TO THE L. FULL CTL INPUTS COULD NOT ARREST THE YAWING MOMENT. WE CAME TO REST A SHORT DISTANCE LATER; WITH THE NOSEWHEEL AND THE L MAIN GEAR ON THE SOFT SHOULDER. THE R MAIN GEAR WAS STILL ON THE RWY. THERE WERE NO INJURIES NOR WAS THE PLANE DAMAGED. POSTFLT CONSIDERATIONS: UNFORECAST; DETERIORATING WX. GUSTY WINDS; POOR BRAKING ACTION. SLICK RWY. MY LIMITED EXPERIENCE WITH WET RWYS AND POOR BRAKING ACTION (I HAD DONE ALL MY TRAINING AND THE MAJORITY OF MY FLYING IN PHOENIX; AZ; WHERE THE RWYS ARE RARELY WET). I HAVE HAD AN IN-DEPTH DISCUSSION WITH A MORE EXPERIENCED FLT INSTRUCTOR; REGARDING HAZARDOUS WX CONDITIONS (TO INCLUDE LCL WX PHENOMENON); RWY CONDITIONS; HYDROPLANING; AND CTL LIMITATIONS UNIQUE TO THE CESSNA 152; AND I AM MORE AWARE OF HAZARDS ASSOCIATED WITH SIMILAR CONDITIONS. WE HAVE REVIEWED ALTERNATE OPTIONS SHOULD I EVER FIND MYSELF IN SIMILAR CONDITIONS AGAIN.