DISPATCHER WAS NOTIFIED BY B737 FLT CREW THAT PROJECTED LNDG FUEL WOULD BE LESS THAN FAR MANDATED FUEL AS A RESULT OF REROUTES FOR WX. COMPANY FUEL.

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FLT RECEIVED NUMEROUS REROUTES TO DEN DUE TO SIGNIFICANT TSTM ACTIVITY IN OK. AFTER RECEIVING A THIRD REROUTE FOR WX AVOIDANCE; THE CREW RELAYED THAT THEY ESTIMATED LNDG DEN WITH 5600 LBS OF FUEL; WHICH WOULD BE 200 LBS LESS THAN THE REQUIRED FAR 45 MIN RESERVE OF 3800 LBS AND THE BURN OF 2000 LBS TO THE REQUIRED ALTERNATE OF COS. AFTER REVIEWING THE ENRTE CONDITIONS ALONG WITH THE WX AND ATC CONSIDERATIONS INTO DEN AND COS; THE CAPT AND DISPATCHER AGREED THERE WAS NO OTHER SAFER COURSE THAN TO CONTINUE TO DEN WITH THE POSSIBILITY OF LNDG UNDER 5800 LBS IN DEN. IN ADDITION; THE FLT RECEIVED MORE DIRECT COURSE INTO DEN; AND RELAYED AN ESTIMATED LNDG FUEL OF 6200 LBS INTO DEN; ABOVE THE REQUIRED MINIMUM. UPON LNDG IN DEN; FLT MONITORING RECORD SHOWED A BLOCK-IN FUEL AT DEN OF 5300 LBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THAT HE HAD BEEN MONITORING FUEL FOR FLTS OPERATING IN THE AREA AFFECTED BY TSTM ACTIVITY. WITH NO ARRIVAL DELAY ANTICIPATED FOR DEN ARPT; THE JOINT DECISION WAS MADE TO CONTINUE TO DEST. DEST ARPT REQUIRED AN ALTERNATE FOR LOW CEILINGS. VISIBILITY WAS GOOD WITH NO TSTM ACTIVITY FORECAST FOR DEN.