look at the dewpoints too
http:// www.ndbc.noaa.gov/station_page.php?station=KGBK
if they're accurate, they'd be record breaking and the heat index would be something like 300 degrees
follow up about the dewpoints
if these are accurate numbers, there probably should be heavy fog, but the visibility has been consistently 8.7 miles
another thought: increase in atmospheric pressure increases dewpoints