AN ACR B737 HAD AN ENCOUNTER WITH 2 VFR SMA'S OVER THE POM VOR. WX FACTOR SEVERE VMC CAUSING A TFC JAM OVER POM.

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WE DEPARTED ONT ON THE POMONA 6 SID. SOCAL CLRED US DIRECT TO POMONA; COMPLY WITH RESTRS (POMONA AT OR BELOW 8000 FT) AND ADVISED US OF SMALL AIRPLANE TFC OVER POMONA AT 8500 FT VFR. WE HAD THE TFC ON TCASII BUT NOT VISUALLY. SOCAL THEN ADVISED US OF SMALL AIRPLANE TFC W OF POMONA EBOUND AT 5500 FT. WE ALSO HAD HIM ON TCASII BUT NOT VISUALLY. IN THE VICINITY OF POMONA VOR; CLBING THROUGH APPROX 5300 FT; A TCASII RA TOLD US TO DSND DUE TO THE 8500 FT TFC. THE COPLT INITIATED THE DSCNT; REACHING ABOUT 5500 FT BEFORE DSNDING. WE ADVISED SOCAL THAT WE WERE DSNDING DUE TO A TCASII RA. SOCAL SAID 'DON'T DSND -- YOU ARE DSNDING BACK INTO HIM.' THE CONFLICTING ACFT APPARENTLY HAD US IN SIGHT; BUT TOOK NO ACTION TO PREVENT OR AVOID THE CONFLICT. ABOUT THE TIME SOCAL FINISHED TELLING US NOT TO DSND; WE WERE ABOUT 5100 FT AND THE TCASII DSND WARNING HAD TERMINATED. WE CONTINUED THE CLB ON THE SID WITH NO FURTHER CONFLICT. THE CLOSEST POINT OF APCH APPEARED TO BE APPROX 2.5 MI LATERAL SEPARATION; 0 VERT. MY GUESS IS THAT TCASII GAVE US A DSND ADVISORY RATHER THAN CLB DUE TO THE 8500 FT TFC ABOVE.