FO OF C560 RPTS ATCT PERSONNEL AT ORF ARE NOT AUGMENTING ASOS AUTOMATED RPTS AS REQUIRED.

Narrative

PRIOR TO ARR; ORF ATIS WAS RPTING MVFR CONDITIONS WITH 4 MI VISIBILITY IN MIST (BR) WITH MOSTLY CLR SKIES. AFTER TOUCHDOWN WE OBSERVED THICK GND FOG (MIFG) COVERING PART OF THE ARPT. THE TXWY WE PLANNED TO EXIT RWY 5 WITH WAS COVERED WITH FOG AND WE USED A DIFFERENT TXWY THAT WAS MORE VISIBLE. DURING OUR STAY THAT EVENING AT ORF; THE METAR/SPECI RPTS WERE TOTALLY INACCURATE. IT APPEARED ORF ATCT (WHICH SUPPOSEDLY AUGMENTS THE ASOS) WAS NOT PROPERLY AUGMENTING ASOS. THERE WAS NOTHING ON ATIS OR IN THE METAR/SPECI; WHICH INDICATED DENSE SHALLOW FOG. THE METAR'S/SPECI'S WOULD GO FROM VFR TO LIFR MINUTE BY MINUTE AS FOG MOVED ACROSS THE ASOS SENSORS. AT TIMES; THE ATIS WOULD HAVE AN OBSERVATION THAT WAS DIFFERENT THAN THE LONG-LINE DISSEMINATED METAR OR SPECI. FOR EXAMPLE; THE ASOS METAR HAD A 1 1/2 MI VISIBILITY AT ONE POINT WHILE THE ATIS HAD A 10 MI VISIBILITY IN MIST (NOT IN ACCORDANCE WITH FAA ORDER 7900.5B). THE 'AUGMENTATION' AT SVC LEVEL C SITES (LAWRS/ATCT) IS INADEQUATE. CTLRS FREQUENTLY DO NOT AUGMENT ASOS PROPERLY AND ALLOW INACCURATE AND/OR INCOMPLETE WX OBSERVATIONS TO BE DISSEMINATED TO PLTS. THIS CAN CAUSE DANGEROUS SITS. I'VE NOTICED AT OTHER ARPTS THAT SOMETIMES CTLRS AREN'T EVEN LOGGED INTO ASOS AND LET METAR/SPECI OBSERVATIONS REMAIN IN 'AUTO' MODE EVEN WHEN THE ATCT IS OPEN.