DAL DEP FLT CREW REPORTED LACK OF WX/WIND INFO PROVIDED TO ARR ACFT BY ATC; NOTING COMPANY FLT CREW ISSUED GAR TO ARR LINED UP WITH OCCUPIED TXWY.

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WE WERE DELAYED ABOUT 40 MINS FOR SEVERE WX AT DAL. TWR INSTRUCTED US TO STAY L AT THE APCH END OF RWY 31L AWAITING OUR RELEASE TIME. DURING OUR HOLD THE RAIN INTENSIFIED TO THE POINT THAT VISIBILITY WAS ABOUT 1/8 MI. I OBSERVED COMPANY FLT NUMBER MAKE A MISSED APCH FROM ABOUT 50 FT AGL AND ADVISED LOVE TWR THAT THE RAIN WAS VERY HVY AND VISIBILITY LESS THAN 1/8 MI. THEY SUBSEQUENTLY DID NOT PASS ON THIS INFO (THE PREVIOUS MISSED APCH; THE VISIBILITY; ETC) TO THE NEXT COMPANY FLT. DURING HIS APCH TO RWY 31L THE RAIN CONTINUED TO INTENSIFY. WHEN WE FIRST OBSERVED THE ACFT ON SHORT FINAL HE WAS ABOUT 150-200 FT OFF THE GND AND LINED UP TO LAND ON TXWY C. THERE WERE 3 COMPANY ACFT HOLDING ON TXWY C AND HE WAS AIMED RIGHT AT ALL OF US. ONE OF THE ACFT DIRECTED HIM TO GO AROUND; WHICH HE DID; XING OVER THE TOP OF ALL 3 ACFT AT LESS THAN 150 FT. ONCE AGAIN; THE TWR CALMLY INSTRUCTED HIM TO CONTACT APCH. I ADVISED THE TWR THAT HE HAD BEEN LINED UP ON THE TXWY AND THAT THE WIND/RAIN/VISIBILITY WAS TERRIBLE. ONLY THEN; DID LOVE TWR BEGIN TO ADVISE SUBSEQUENT ACFT THAT THERE WAS LLWS ALERTS ON FINAL. DURING THIS ENTIRE SEQUENCE; I FEEL LOVE TWR WAS NOT ADVISING ACFT OF THE SEVERITY OF CONDITIONS ON THE ARPT AND HAD FLT NUMBER NOT BEEN INSTRUCTED TO GO AROUND BY ONE OF OUR ACFT; HE COULD HAVE ATTEMPTED TO LAND ON TXWY C; RESULTING IN A HORRENDOUS ACCIDENT INVOLVING MULTIPLE ACFT. I WAS AMAZED AT THE LACK OF INFO BEING GIVEN TO ARRIVING ACFT AND HOW THIS SET OUR ACFT UP FOR POTENTIALLY DISASTROUS RESULTS. I FEEL THE TAPES SHOULD BE LISTENED TO AND A DISCUSSION WITH LOVE TWR ON WHAT IS APPROPRIATE INFO TO BE GIVEN. THIS WAS A CLOSE CALL THAT COULD HAVE BEEN PREVENTED WITH A LITTLE INFO ON THE SEVERITY OF THE WX RATHER THAN JUST CLRING ACFT TO LAND; BUSINESS AS USUAL. MORE INFO FROM THE TWR TO ARRIVING ACFT. SUPPLEMENTAL INFO FROM ACN 758416: FIRST ACFT TO ATTEMPT LNDG AFTER FLT NUMBER WENT AROUND FROM OVER THE LNDG THRESHOLD WAS NOT INFORMED OF THIS FLT'S GAR. WHEN I FIRST SAW THIS ACFT HE APPEARED TO BE SLIGHTLY R OF COURSE. WHEN I LOOKED AGAIN HE WAS LINED UP ON THE TXWY COMING STRAIGHT AT US. WE XMITTED TO GO AROUND AND THE ACFT SUBSEQUENTLY DID. A MICROBURST ALERT WAS THEN ISSUED BY TWR AFTER THE GAR. WE NOTICED THAT THE VISIBILITY TO THE SE WAS REASONABLY GOOD BUT THE VISIBILITY TO THE NW WAS TERRIBLE. HEADS UP IN THE TWR AND DISPATCH! WHEN A CREW BEGINS TO NARROW THEIR FOCUS TO PLACING AN ACFT ON A PRECISION PATH IN MARGINAL/DIFFICULT WX; IT WOULD BE VERY EASY TO MISS A RAPIDLY DEVELOPING MICROBURST RIGHT AT THE FIELD. THESE GUYS NEEDED SOME HELP AND DIDN'T REALLY RECEIVE IT. I WOULD RECOMMEND A REVIEW OF THE TWR TAPES DURING THIS PERIOD ALONG WITH A SIMULTANEOUS CHRONOLOGY OF THIS STORM.