Stubborn Snowdepth: April 22nd

It finally happened: on April 22nd the International Airport's measurement of snowdepth was blank:

The International's final snowdepth measurement was 2cm on April 21st, and Blatchford's was 1cm on April 15th.

(Environment Canada used to report "0cm" which works better for this chart, because then it can actually close the loop. "Blank" leaves things hanging.)

Here is how the snowdepth for the winter of 2019-2020 compared to other years.

A final snow on April 15th at Blatchford is late, but not as late as 2017-2018 which went to April 19th. And April 21st is also late for the International.

The International's snow was gone on April 22nd, but since records began in 1961 (or 1955 for Blatchford) there were only 7 other winters which did still have snow that late. They are shown in the chart above:

• 2008, 1985 & 1972 were all on their second round of snow by that point.
• 2013 lasted to April 25
• 1974 lasted to April 22
• 1967 lasted to April 24
• 1965 lasted to April 23

So only 4 winters at the International had later melts than 2019-2020.

The International finishes the winter with 169 days in-a-row with snow on the ground - from November 5th to April 21st. 2018 went 172 days, with an earlier start on October 31st, and the final melt on April 20th.

Blatchford went 141 days this winter, from November 27th to April 15th. That was well below the 170 days in 2017-2018, from November 1st to April 19th.