Narrative:

Thunder showers were reported in the mco area prior to our arrival. After being vectored around cells and placed on approximately 10 mi final for runway 36R, we were cleared for a visual approach. We noticed a rain shower to the left of the runway as we approached. ILS back up was used. The first officer commented to the captain that a go around may be required if the WX moved toward the runway. The wind was reported from the west. The first officer requested and received missed approach instructions from the tower. The approach was continued with our feeling that the shower would not be over the field prior to our arrival. Normal procedures and callouts were used to 20' AGL when moderate turbulence was encountered. At or just prior to T/D, the visibility became nil to none (forward) due to the heavy rain which engulfed the aircraft. The wind became much stronger from the left and I noticed the captain with full control input for the wind and the aircraft still WX vaned toward the far right side of the runway. I saw from my window behind the first officer the position and shouted to steer the aircraft to the left. The aircraft was then centered on the runway and we taxied to the gate. Upon post-flight inspection of aircraft, grass and mud were seen in the right wheel well. Also right main tire. That tire was changed though it was well within limitations as a precaution. We completed our trip series with no further problems. Reports were sent to our company as per operations manual requirement. Any further occurrences of this type of WX situation will be handled with a precautionary go around and hold until the WX improves.

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Original NASA ASRS Text

Title: HEAVY RAIN AND WINDS DURING LNDG CAUSE RWY EXCURSION.

Narrative: THUNDER SHOWERS WERE RPTED IN THE MCO AREA PRIOR TO OUR ARR. AFTER BEING VECTORED AROUND CELLS AND PLACED ON APPROX 10 MI FINAL FOR RWY 36R, WE WERE CLRED FOR A VISUAL APCH. WE NOTICED A RAIN SHOWER TO THE LEFT OF THE RWY AS WE APCHED. ILS BACK UP WAS USED. THE F/O COMMENTED TO THE CAPT THAT A GO AROUND MAY BE REQUIRED IF THE WX MOVED TOWARD THE RWY. THE WIND WAS RPTED FROM THE W. THE F/O REQUESTED AND RECEIVED MISSED APCH INSTRUCTIONS FROM THE TWR. THE APCH WAS CONTINUED WITH OUR FEELING THAT THE SHOWER WOULD NOT BE OVER THE FIELD PRIOR TO OUR ARR. NORMAL PROCS AND CALLOUTS WERE USED TO 20' AGL WHEN MODERATE TURB WAS ENCOUNTERED. AT OR JUST PRIOR TO T/D, THE VIS BECAME NIL TO NONE (FORWARD) DUE TO THE HEAVY RAIN WHICH ENGULFED THE ACFT. THE WIND BECAME MUCH STRONGER FROM THE LEFT AND I NOTICED THE CAPT WITH FULL CTL INPUT FOR THE WIND AND THE ACFT STILL WX VANED TOWARD THE FAR RIGHT SIDE OF THE RWY. I SAW FROM MY WINDOW BEHIND THE F/O THE POS AND SHOUTED TO STEER THE ACFT TO THE LEFT. THE ACFT WAS THEN CENTERED ON THE RWY AND WE TAXIED TO THE GATE. UPON POST-FLT INSPECTION OF ACFT, GRASS AND MUD WERE SEEN IN THE RIGHT WHEEL WELL. ALSO RIGHT MAIN TIRE. THAT TIRE WAS CHANGED THOUGH IT WAS WELL WITHIN LIMITATIONS AS A PRECAUTION. WE COMPLETED OUR TRIP SERIES WITH NO FURTHER PROBS. RPTS WERE SENT TO OUR COMPANY AS PER OPS MANUAL REQUIREMENT. ANY FURTHER OCCURRENCES OF THIS TYPE OF WX SITUATION WILL BE HANDLED WITH A PRECAUTIONARY GO AROUND AND HOLD UNTIL THE WX IMPROVES.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.