By Graham Saunders
First Posted: Wednesday, July 6, 2016 For The Chronicle-Journal
Was June wet enough for you? The long-term average rain total for June at the Thunder Bay Airport is 86 millimetres but varies considerably. For example, June 2003 had a total of 35.5 millimetres, compared to an estimated 228 millimetres this year. The previous record was 196 millimetres, set in June 2008.
This June total is slightly higher than the monthly total recorded in May 2012, the time of devastating flooding in Thunder Bay and some adjacent rural areas. Heavy rain totals on June 28 were similar to May 28, 2012 but the “character” and timing were different. The maximum rate in May 2012 was 48 millimetres/hour compared to intensities of about half of this a week ago.
Other factors helped:
• The city was better prepared.
• 84 to about 100 millimetres fell in two periods separated by about two hours.
• Afternoon and evening storm situations are easier to cope with than overnight events. (Most of the rain fell between midnight and 2 a.m. on May 28, 2012.)
An editorial titled “100-year storms every four years” was published in The Chronicle-Journal on June 28. It noted that the frequency and intensity of such severe-weather events is increasing. I noticed “These are not unusual weather events but rather regular summertime storms . . .” in one of the comments. This is not correct.