FLT CREW OF A320 RECEIVED MICROBURST ALERT DURING FLARE AT DEN ELECTED TO LAND.

Narrative

WX IN THE DENVER AREA WAS VIRGA ALL QUADRANTS -- NO CONVECTIVE ACTIVITY. NUMEROUS WINDSHEAR AND MICROBURST ALERTS CAUSED DELAYS FOR AN APCH. DENVER APCH RE-ESTABLISHED APCHS TO RWY 17R. VIRGA WAS 5-7 MI N OF THE ARPT. THE ACFT IN FRONT OF US RPTED A MAX OF 15 KT AIRSPD LOSS ON THE APCH. WE CONFIGURED AND USED THE RECOMMENDED FLAPS 3 CONFIGN. AT 1000 FT AFE; WE WERE WITHIN STABILIZED PARAMETERS. A RPT WAS MADE OF A 35 KT LOSS OF AIRSPD BY AN ACFT 5 NM N OF RWY 17R (APPROX WHERE THE VIRGA WAS LOCATED). AN ACFT BEHIND US WENT AROUND. AT APPROX 1500 FT AGL; THE PREDICTIVE WINDSHEAR SYS BECAME INOP (IT DOESN'T MONITOR ANYTHING UNTIL BELOW 2300 FT AGL). WE ATTEMPTED 3 TIMES TO GET A WINDSHEAR ADVISORY UPDATE FOR RWY 17R AND KEPT GETTING 'STEPPED ON' WITH OTHER ACFT AND TWR XMISSIONS. AIRSPD FLUCTUATIONS WERE WITHIN +/- 10 KTS. WINDS DISPLAYED ON OUR NAV DISPLAY WERE VARIABLE 5-10 KTS. IN THE FLARE; AT APPROX 30 FT AGL; THE TWR RPTED A MICROBURST ALERT. WE FELT THE SAFEST COURSE OF ACTION WAS TO LAND INSTEAD OF SPOOLING UP TO GAR THRUST AND CLBING INTO IT.