030 WWHW70 PHFO 201952 NPWHFO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE HONOLULU HI 952 AM HST MON FEB 20 2006 ...DENSE FOG OVER MAUNA KEA AND MAUNA LOA... .CLOUDS HUGGING THE SUMMITS OF THE BIG ISLAND ARE PERIODICALLY REDUCING VISIBILITY TO LESS THAN 1/4 OF A MILE ABOVE 12000 FEET. CONDITIONS ARE EXPECTED TO IMPROVE LATER THIS AFTERNOON. HIZ028-210200- /O.EXT.PHFO.FG.Y.0002.000000T0000Z-060221T0200Z/ BIG ISLAND SUMMITS- 952 AM HST MON FEB 20 2006 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 4 PM HST THIS AFTERNOON... THE DENSE FOG ADVISORY IS NOW IN EFFECT UNTIL 4 PM HST THIS AFTERNOON. A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. $$