|Is wind directional change with height less
than 30 ° from surface to 850 millibars and
less than 60 ° from the surface to 700 millibars?
|Is the average lake water temperature greater
than 13° C more than the 850 mb
temperature AND is lake unfrozen?
|Is the height of the inversion (depth of arctic air)
above the 700 millibar level?
|Is the average PBL windspeed between
10 mph and 45 mph?
|Is the fetch of wind over the lake greater
than 100 kilometers?
|Does significant orographic lifting occur
downwind from the lake?
|Is the average PBL temperature below freezing