Another Sharp Temperature Change
This time, a rapid drop. After the “V” dip noted in my previous blog post, the temperature climbed to 55.6° (at 01:00 on the 21st) and stayed there for 40 minutes.
Then the bottom fell out, oddly enough accompanied by a decrease in wind and only a slight shift in direction from WSW to NW (though the house would block a more southerly flow and probably skew it around to SW or WSW). At the same time, light rain began falling, continuing until nearly 5am when it ended as a brief period of snow (leaving only a trace on rapidly cooled objects).
During this rapid temperature drop, sharpest between 01:45 and 01:50 when it dropped almost a degree a minute (from 54.5° to 49.9°), the temperature fell 19.4 degrees in 55 minutes.
Daylight hours brought a brief reprieve; but, the day ended 31.4° degrees colder than it began.