Narrative:

Upon climb out from msn, we encountered rapidly deteriorating WX including a fast building fog. Once we detected this we added carburetor heat, pitot heat and reduced throttle to try to remain below the observed ceiling. While this was unsuccessful, we contacted ATC requesting vectors and clearance for an immediate return to msn, stated that we were IMC at that time and needed assistance to get back. My passenger was also a private pilot who assisted by watching for visual breakout during our descent. We were vectored back on a parallel course to runway 31 with clearance to descend to 1400 ft. We broke out at approximately 1450 ft, executed a 180 degree turn for direct approach.

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Original NASA ASRS Text

Title: PLT AND PAX DEPARTED MSN ARPT AND SHORTLY AFTER ENCOUNTERED IMC WX REQUIRING A RADAR ASSIST BACK TO THE ARPT.

Narrative: UPON CLBOUT FROM MSN, WE ENCOUNTERED RAPIDLY DETERIORATING WX INCLUDING A FAST BUILDING FOG. ONCE WE DETECTED THIS WE ADDED CARB HEAT, PITOT HEAT AND REDUCED THROTTLE TO TRY TO REMAIN BELOW THE OBSERVED CEILING. WHILE THIS WAS UNSUCCESSFUL, WE CONTACTED ATC REQUESTING VECTORS AND CLRNC FOR AN IMMEDIATE RETURN TO MSN, STATED THAT WE WERE IMC AT THAT TIME AND NEEDED ASSISTANCE TO GET BACK. MY PAX WAS ALSO A PVT PLT WHO ASSISTED BY WATCHING FOR VISUAL BREAKOUT DURING OUR DSCNT. WE WERE VECTORED BACK ON A PARALLEL COURSE TO RWY 31 WITH CLRNC TO DSND TO 1400 FT. WE BROKE OUT AT APPROX 1450 FT, EXECUTED A 180 DEG TURN FOR DIRECT APCH.

Data retrieved from NASA's ASRS site as of July 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.