Tuesday, October 2, 2018

September 2018 Summary


A very hot and somewhat dry September

The month of September saw 2 different heat waves, it started with 5 days of temperatures close to 30°C and then another 5 that were above 25°C around the middle of the month.  Although there were a few cooler days in between, the average temperature was almost 3.5 degrees above average.  This resulted in it being the 5th warmest September in the 100+ years of records in the region.

A couple of other random facts about this past September: The 5 days 30°C or over were the most since 1952.  The average low temperature was 4 degrees above average, this is the third highest in the historical record.  This month continues the pattern of warm Septembers we have seen recently, with only 1 in the past 20 years slightly below the 1981-2010 average and the rest above.

A dry 10 day period in the middle of the month resulted in the total precipitation (62.8 mm) coming in well below the average (87.8 mm).  The amount of precipitation we have seen so far this year of 690.9 mm is just slightly above the average of 683.5 mm.

Summary for September 2018:
Maximum Temperature 31.9°C
Minimum Temperature 3.4°C
Average Daily High Temperature 23.1°C (Long term average 20.4°C)
Average Daily Low Temperature 12.7°C (Long term average 8.6°C)
Total Precipitation 62.8 mm (Long term average 87.8 mm)

(Long term averages based on 1981-2010 data for the Waterloo-Wellington Airport)



Sunday, September 2, 2018

August 2018 Summary


A hot August that was also wet

Well that was a very hot August, coming in at 2.8 degrees above the 1981-2010 average making it the second warmest in the past 20 years and in the top 10 in the 100 years of data in the region.  It was a consistent warmth with the average temperature of only one day (the 22nd) being below average.

Although the days were warm, the heat didn’t go away overnight as the daily low temperatures were the warmest in 20 years.  Which means that if you didn’t have air conditioning it may have been difficult to sleep.

Despite a dry period of about a week, there were also 3 days above 20 mm of precipitation resulting in a total for August of 110.7 mm compared to the average of 83.9 mm.  This wet month brought the total precipitation for the year of 628.1 mm back above the average of 596.0 mm for this time of year.


Summary for August 2018:
Maximum Temperature 31.9°C
Minimum Temperature 10.5°C
Average Daily High Temperature 27.1°C (Long term average 24.8°C)
Average Daily Low Temperature 16.3°C (Long term average 12.9°C)
Total Precipitation 110.7 mm (Long term average 83.9 mm)

(Long term averages based on 1981-2010 data for the Waterloo-Wellington Airport)



Wednesday, August 1, 2018

July 2018 Summary


A hot and very dry July

We have now had our third month in a row of above average temperatures with July coming in at 1.5 degrees warmer than average.  However, it was the tale of the two halves of the month with the first half being 2 degrees warmer than the second half.  That first half of the month also saw all of the 10 days that were above 30°C, something we only see 3.5 times on average in July.

The bigger story was the lack of rain during the first 15 days of the month, which combined with the high temperatures, made it hard for non-irrigated vegetation.  We broke that drought with 23.4 mm on the 16th followed by what was a pretty average rest of July.  However, this could not fill the deficit and the final total of 51.2 mm was only a little more than half the average total of 98.6 mm.

But even as hot and dry as that seems, note that we only have to go back to 2012 to find a July that was both hotter and drier.

This dry month brought the total precipitation for the year of 517.2 mm back down closer the average of 509.0 mm.


Summary for July 2018:
Maximum Temperature 32.9°C
Minimum Temperature 8.4°C
Average Daily High Temperature 27.9°C (Long term average 26.0°C)
Average Daily Low Temperature 15.1°C (Long term average 14.0°C)
Total Precipitation 51.2 mm (Long term average 98.6 mm)

(Long term averages based on 1981-2010 data for the Waterloo-Wellington Airport)



Monday, July 2, 2018

June 2018 Summary


A hot and dry June

While coming down from May, which was 4.5 degrees above average, June was still more than 1 degree above average.  We have to go back to 2009 for the last time there was a June with below average overall temperature.

This year there were 4 days above 30°C, while the high temperature of 33.4°C on the 17th was the warmest June day since 2005 (when it was 33.5°C on the 27th).  That was almost topped on the last day of the month when it got up to 33.2°C.

It was a dry month that included a streak of 12 days when we received less than half of a millimetre of rain.  Even the 20 mm of rain that came down on the 24th only managed to put the total precipitation for the month (56.6 mm) just below the bottom of the average range (60.5 mm).

For the first half of the year, the total precipitation we have seen of 466.2 mm is not that far above what we would expect for the halfway mark of 416.1 mm.

Also a note about the sad news that professor Ric Soulis of the University of Waterloo Civil Engineering department passed away during June.  It is no exaggeration to say that without Ric there would be no UW Weather Station.  It was through his vision and guidance that the idea for the weather station was born and implemented.  He will be greatly missed by the many who got to know him throughout the years.

Summary for June 2018:
Maximum Temperature 33.4°C
Minimum Temperature 7.5°C
Average Daily High Temperature 24.4°C (Long term average 23.6°C)
Average Daily Low Temperature 13.0°C (Long term average 11.5°C)
Total Precipitation 56.6 mm (Long term average 82.4 mm)

(Long term averages based on 1981-2010 data for the Waterloo-Wellington Airport)



Monday, June 25, 2018

Ric Soulis (1949-2018)


I am saddened to share the news that Professor Ric Soulis passed away on June 21.  It is no exaggeration to say that without Ric there would be no UW Weather Station.  It was through his vision and guidance that the idea for the weather station was born and implemented.

My personal relationship with Ric started when he gave a 4th year Geological Engineering student an opportunity to complete an undergraduate thesis under his supervision back in 1990.  This then led to a Masters under his co-supervision with Dr. Nick Kouwen and afterward employment for over 10 years principally on the Mackenzie Basin GEWEX project (for which we co-authoured the chapter on Hydrologic modelling in the final report).  During this employment I also completed a part-time PhD under his supervision.  He always had a positive attitude towards life even given his struggles with post-polio syndrome that limited his physical activities.  He always made the time for any student to give them answers to a question or just share his views on science.

 I will forever be grateful for all the opportunities, mentorship, and friendship he provided me over these many years.

Frank Seglenieks
UW Weather Station Coordinator

Details of the arrangements can be found here:
https://erbgood.com/tribute/details/14063/Dr-Eric-Ric-Soulis-P-Eng/obituary.html#tribute-start