Thursday, February 11, 2016

Lexington KY's Snowfall History Since 01/01/1990

Well, that was an interesting project. I picked apart the last 25 years or so of the calendar years and official snow seasons that run from July 1 through June 30 of each year and came up with some revealing totals for Lexington KY. Find out which day of each month had the most days of measurable snow >0.1" during the winter season of December through February over all those years. How about which days of the winter season did not record any measurable snow greater than a trace amount. And of course, the efficiency numbers. I'll explain that in a little bit.

Days of Snow Total Inches Inches/Day
1-Feb 2 1.1 0.55
2-Feb 4 6.1 1.53
3-Feb 5 8.4 1.68
4-Feb 6 14.6 2.43
5-Feb 5 3.9 0.78
6-Feb 6 7.0 1.17
7-Feb 4 5.8 1.45
8-Feb 6 5.1 0.85
9-Feb 6 6.6 1.10
10-Feb 8 5.3 0.66
11-Feb 4 6.8 1.70
12-Feb 3 1.8 0.60
13-Feb 5 2.7 0.54
14-Feb 5 2.5 0.50
15-Feb 3 10.2 3.40
16-Feb 4 11.3 2.83
17-Feb 3 3.3 1.10
18-Feb 2 5.5 2.75
19-Feb 1 0.1 0.10
20-Feb
21-Feb 2 1.1 0.55
22-Feb 1 1.8 1.80
23-Feb 3 0.7 0.23
24-Feb 1 0.8 0.80
25-Feb 4 8.3 2.08
26-Feb 4 1.6 0.40
27-Feb 1 0.2 0.20
28-Feb 1 0.3 0.30
29-Feb 1 0.5 0.50
100 123.4 1.16

This is just a sample of what my spreadsheet looks like for February since 1990, ending in 2015. As you can see, the 2nd column shows the number of instances with measurable snow greater than 0.1" for that date. The 3rd column displays the total snowfall that has occurred for that date. Then, the last column shows the efficiency number, or how many inches of snow accumulated during each instance for that date.

The most productive snow days fall right in the middle of the month. Since 1990, February 15 and 16 typically average between 2.8 and 3.4" per snow event.

During any given year, February 10 has proven to be the likeliest day you will have measurable snow. Yesterday, as a matter of fact, Lexington received 0.5" of snow for this February 10. Of course, that is not included in the table above, since it only runs through 2015. But, now you can chalk up another day, at 9 now, that it has snowed on February 10 since 1990.

The 123.4" that has accumulated during the 1990-2015 time period is the snowiest month of the winter and subsequently the calendar year. Yes, it beat out the month of January, which has more days, and every day of that month has seen some type of measurable snow throughout the aforementioned time period.

At the moment, February 20 is the only day that has not registered any measurable snow since 1990.

MS



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