Yesterday I posted a WUWT article about Tmin in the UK rising 1.7C thanks to UHI.
I ive near Nanaimo BC and here is the graphs for Tmin and Tmax since 1947.
Tmax has barely changed. Tmin is up 2C or more. UHI.
Data from Weatherstats and Environment Canada
It was the second coldest February in Nanaimo , BC , Canada (data from 1948) in terms of average temperature. The average was 0.05C .
The coldest was 1989 when it averaged-0.03C.
2019
1989
The warmest February was 2015 and it looked like:
Data courtesy weatherstats.ca and Environment and Climate Change Canada
The Climate Change believers claim there will be more heatwaves.
“Global climate change is likely to be accompanied by an increase in the frequency and intensity of heat waves … “
Five years ago (omg) I did a post about how the number of days over 20/25/30C isn’t increasing in my hometown on the westcoast of British Columbia.
This post uses actual days in a heatwave. Lets arbitrarily say a heatwave is consecutive days at or above a certain temperature (I’ll do 25C and 30C).
This is not perfect process because the data from Envornment Canada can be spotty.
I’m only looking at data from 1947 on (which is when a major station move occurred). And I have this caveat: If there is missing data I ignore it.
So, for 25C cutoff, 1977 had 31 days total above 25C and a 22 day stretch above 25C.
| Year | Days Total | Longest | Start | End |
| 1977 | 31 | 22 | 1977-07-30 | 1977-08-20 |
| 1971 | 37 | 20 | 1971-07-14 | 1971-08-02 |
| 1958 | 73 | 17 | 1958-08-09 | 1958-08-25 |
| 1961 | 62 | 17 | 1961-07-30 | 1961-08-15 |
| 1969 | 54 | 15 | 1969-07-17 | 1969-07-31 |
| 2015 | 53 | 15 | 2015-06-25 | 2015-07-09 |
| 2017 | 57 | 15 | 2017-07-28 | 2017-08-11 |
| 1974 | 51 | 14 | 1974-09-12 | 1974-09-25 |
| 1981 | 34 | 14 | 1981-08-05 | 1981-08-18 |
| 1972 | 48 | 13 | 1972-07-28 | 1972-08-09 |
| 1978 | 37 | 13 | 1978-07-28 | 1978-08-09 |
| 2004 | 52 | 13 | 2004-08-08 | 2004-08-20 |
| 1967 | 62 | 12 | 1967-08-08 | 1967-08-19 |
| 1968 | 35 | 12 | 1968-07-23 | 1968-08-03 |
| 1975 | 46 | 12 | 1975-06-30 | 1975-07-11 |
| 1990 | 43 | 12 | 1990-08-03 | 1990-08-14 |
| 1962 | 21 | 11 | 1962-07-21 | 1962-07-31 |
| 1985 | 40 | 11 | 1985-07-13 | 1985-07-23 |
| 1998 | 51 | 11 | 1998-07-20 | 1998-07-30 |
| 2009 | 46 | 11 | 2009-07-24 | 2009-08-03 |
For 30C the longest heatwave is in 1977. No other year comes close.
If you are interested this is the listof temperatures:
30.6,32.4,30.5,33.6,33.2,31.7,30.4,30.8,31.4,33.9,33.8,32.5,30.9,31.1,32.3,34.5,34.5
| Year | Days Total | Longest | Start | End |
| 1977 | 18 | 17 | 1977-08-01 | 1977-08-17 |
| 1968 | 15 | 8 | 1968-07-26 | 1968-08-02 |
| 1974 | 14 | 8 | 1974-08-27 | 1974-09-03 |
| 2009 | 17 | 8 | 2009-07-26 | 2009-08-02 |
| 2018 | 19 | 8 | 2018-07-23 | 2018-07-30 |
| 1959 | 9 | 7 | 1959-07-16 | 1959-07-22 |
| 1962 | 7 | 7 | 1962-07-22 | 1962-07-28 |
| 1958 | 27 | 6 | 1958-07-23 | 1958-07-28 |
| 1967 | 18 | 6 | 1967-08-12 | 1967-08-17 |
| 1971 | 17 | 6 | 1971-07-25 | 1971-07-30 |
| 1981 | 9 | 6 | 1981-08-06 | 1981-08-11 |
| 2004 | 16 | 6 | 2004-06-17 | 2004-06-22 |
| 2014 | 17 | 6 | 2014-07-11 | 2014-07-16 |
| 1969 | 8 | 5 | 1969-06-15 | 1969-06-19 |
| 1972 | 18 | 5 | 1972-07-17 | 1972-07-21 |
| 1996 | 11 | 5 | 1996-07-23 | 1996-07-27 |
| 2010 | 7 | 5 | 2010-08-13 | 2010-08-17 |
| 2015 | 19 | 5 | 2015-07-01 | 2015-07-05 |
| 1950 | 8 | 4 | 1950-07-21 | 1950-07-24 |
| 1952 | 12 | 4 | 1952-07-08 | 1952-07-11 |
Note that 1958 clobbers the other years when it comes to days total. But they were broken up.
1977 also happens to have occurred as the Great Pacific Climate Shift started.
Where are the heatwaves they promised me?
I thought I would look at the year in which daily records for Nanaimo BC (near where I live).
The data starts in 1947 and goes to 2016. You can get data here.
There must be a fingerprint of Extremeness somewhere … right?
I guess not. The early 40s/50s set a lot of cold records. The high records are all over the place.
A few days I published 10 more randomly chosen graphs of TMAX using Environment Canada’s monthly summaries.
I was fiddling with the graphing code to add the overall rate of temp change and color the title – red for warming and blue for cooling.
I took a closer look at 3 stations (2 are airports).
Tmax temperatures falling at -.414C /dec, -.224/dec and -.246/dec
April Tmax in Brandon have fallen 7C in 35 years.
A few days I published 10 randomly chosen graphs of TMAX using Environment Canada’s monthly summaries.
I picked 1980 to 2015 partly to create a round number and partly because that is sort of when AGW became noticeable.
I picked TMAX because I think TMIN’s are rising because of UHI.
The red lines indicate a warming trend. The blue a cooling trend.
Anyone see evidence of CO2 making it warm?
Here are 10 more.
Every once in a while I visit the data for the Canada. Earlier today I looked at the station nearest me (NANAIMO A).
But since I have the code … I thought why not look at 10 random stations that have data in 1980 and 2015.
Today I am looking at TMAX monthly data (using Environment Canada monthly summaries) for 10 random stations from 1980.
Each line of graphs is a season – Dec/Jan/Feb …. etc.
Every once in a while I visit the data for the weather station closest to my hometown on the west coast of Canada.
Today I am looking at TMAX monthly data (using Environment Canada monthly summaries) for NANAIMO A from 1980.
Each line of graphs is a season – Dec/Jan/Feb …. etc.
5 months are warming. 4 are cooling. 3 are cooling ever so slightly.
If there is a CO2 signal in there I am missing it.
I live near Nanaimo BC (data from 1947 at “NANAIMO A”). I was curious what the temperature range for any given day would be.
By temperature range I mean find the warmest it has ever been for a particular day and then subtract the coldest it has ever been.
December 1st , February 4th, November 14th and May 16 have the biggest range = 32.8C.
November 18th has the lowest range = 16.9C. (I find it interesting it has never been colder than -4.4C on November 18 when it has been -16.1C on November 14th.
(Remember this when someone says humans and animals will notice a 1C change in the next 100 years).
Top 10 and bottom 10 below.
Biggest Difference:
| Month | Day | Min | Max | Difference |
| 12 | 1 | -18.9 | 13.9 | 32.8 |
| 2 | 4 | -16.7 | 16.1 | 32.8 |
| 11 | 14 | -16.1 | 16.7 | 32.8 |
| 5 | 16 | -4.4 | 28.4 | 32.8 |
| 6 | 17 | 0.6 | 33.3 | 32.7 |
| 5 | 29 | 1.7 | 34.3 | 32.6 |
| 5 | 12 | 0 | 32.4 | 32.4 |
| 5 | 28 | 0.6 | 33 | 32.4 |
| 5 | 14 | -0.6 | 31.7 | 32.3 |
| 12 | 24 | -13.9 | 18.2 | 32.1 |
Lowest Difference:
| Month | Day | Min | Max | Diffference |
| 11 | 18 | -4.1 | 12.8 | 16.9 |
| 3 | 15 | -3.3 | 14.5 | 17.8 |
| 12 | 5 | -7.1 | 12.1 | 19.2 |
| 11 | 10 | -4.4 | 14.9 | 19.3 |
| 12 | 11 | -6.1 | 13.5 | 19.6 |
| 12 | 3 | -5.9 | 14 | 19.9 |
| 12 | 12 | -6.3 | 13.9 | 20.2 |
| 2 | 23 | -5.6 | 14.6 | 20.2 |
| 3 | 14 | -3.9 | 16.6 | 20.5 |
| 3 | 17 | -5 | 15.7 | 20.7 |
Every once in a while I visit the data for the weather station closest to my hometown on the west coast of Canada.
Today I am looking at daily TMAX data from Nanaimo Airport (1947 – 2015).
1987 was the warmest year (1958 was 2nd warmest FYI) . 1955 was the coldest They are shown as the orange and blue lines.
Here I have graphed all the available data in the style I usually use for Sea Ice data.
2015 is in red. There are gaps because Environment Canada doesn’t seem to care.
Notice that temps can fluctuate by 20C for the same day in different years.
Ponder this … why can we humans (and crops and animals) adapt to 20C swings but we can’t adapt to a 1C change over 100 years?
Click graph for larger.
Update: I added Tmin
sunshine hours 