Very large, heavily rimed dendritic crystal (left) and
the RUC (Rapid Update Cycle) forecast sounding (right) at time of
collection. Temperature (red) and Dewpoint (green) are displayed using BUFKIT
software, which has a function to show the favorable dendritic growth
zone within a sounding. The portion of the temperature trace that is
favorable for dendritic growth (-12C to -18C) is outlined in purple, if
there is also enough moisture to promote growth, then the line turns yellow.
In this sounding, there is a rather shallow layer between ~ 7500ft - 10000ft.
favorable for dendritic formation, and below that a deep layer of saturated air
between 0C and -12C, where supercooled water droplets likely contributed to
the riming that occurred on the snow crystal.
Surface Temperature was 33F (+1C) at time of collection.