A C150 PLT ENCOUNTERS IMC CONDITIONS AT 400 FT AFTER TKOF IN WHAT APPEARS TO BE VMC CONDITIONS.

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I ARRIVED VUJ AT AROUND XA30 FOR A VFR FLT TO RUQ. AT THAT TIME I CALLED RUQ AWOS AND LEARNED THAT THE CONDITIONS WERE: VISIBILITY 3/4 MILE; MIST; CEILING INDEFINITE. VUJ AWOS WAS RPTING VISIBILITY 5 MILES; CLR BELOW 12000 FT. IT WAS HAZY; BUT DIDN'T SEEM TOO BAD. I FUELED THE PLANE AND WAITED FOR CONDITIONS TO IMPROVE AT RUQ. I CALLED OCCASIONALLY TO SEE HOW CONDITIONS WERE AT RUQ. EACH TIME I CALLED THE CONDITIONS WERE BETTER. AT AROUND XB15 RUQ WAS RPTING VISIBILITY 2.5 MILES; MIST AND SCATTERED AT 700 FT. AT APPROX XB30 I MADE THE DECISION TO DEPART FOR RUQ. VUJ WAS RPTING 7 MILES VISIBILITY AND CLR BELOW 12000 FT. AFTER TAXI AND RUN-UP I DEPARTED RWY 4R AT AROUND XB45. AS I CLBED OUT VISIBILITY WAS GOOD AROUND AND BELOW ME; BUT THE SUN ON THE HAZE MADE IT DIFFICULT TO TELL WHAT WAS ABOVE. AT APPROX 1000 FT MSL (400 FT AGL) I ENTERED A VERY THIN LAYER OF CLOUDS THAT I COULD NOT SEE DUE TO THE HAZE. I WAS IN WHITE-OUT CONDITIONS FOR 3 TO 5 SECONDS AND WAS ABOUT TO TURN TO GET OUT OF THE CLOUDS WHEN I BROKE THROUGH THE TOP. WHEN I LOOKED BACK I COULD SEE THAT I HAD ENTERED THE LEADING EDGE OF THE CLOUD LAYER AND AS I CONTINUED TO CLB I COULD SEE THAT THE THIN; BROKEN TO SCATTERED LAYER OF CLOUDS WAS APPROACHING THE ARPT FROM THE NE. THE CLOUD PATCH WAS NOT VERY LARGE AND LOOKED AS IF IT WAS CAUSED BY THE NEARBY LAKES TO THE N AND E. I COULD SEE THAT THE CLOUDS WOULD NOT BE A FACTOR FOR ME SINCE I WAS HEADING NW AND SINCE VISIBILITY WAS GOOD IN THE DIRECTION OF MY DEST I CONTINUED TO RUQ WITHOUT FURTHER INCIDENT. FACTORS AFFECTING MY DECISIONS WERE: THE NEED TO GET TO WORK. PERCEIVED VFR CONDITIONS.