Dense Fog Advisory Timing
Posted:
                    The new year has seen plenty of dense fog, which has prompted the NWS to issue a number of 
Dense Fog Advisories to alert the public to its impacts.  The featured chart presents the time of day 
frequency for advisories issued for Story County (Ames).  Please note that this plot does not imply 
overall frequency in time, but only for time when the advisories are active.  For example, for the 146 
such advisories issued for Story County, about 70% of them were active during 6 AM.  The chart 
shows a clear diurnal signal with sunshine often helping to "burn off" the fog and prompt the end to 
the advisory.  Such will hopefully be the case today with sunny conditions expected after the fog 
dissipates. 
Voting:
Good = 10
Bad = 1
Tags: fog
        Voting:
Good = 10
Bad = 1
Tags: fog
