Graphs and Data

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Glacier
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Re: Graphs and Data

Postby Glacier » Tue Nov 28, 2017 9:51 am

Typeing3 wrote:Would be pretty interesting to compare both the west and east coasts of Canada. I remember reading that their averages have stayed relatively the same since records began.

The maximum temperatures have not warmed, but the minimums have warmed significantly, hence the means have increased.

Warmest years (by maximums):
1) 1958 = 15.4C
2) 1934 = 15.2C
3) 2015 = 15.0C

Warmest years (by mins):
1) 2004 = 8.1C
2) 1998 = 8.0C
3) 2015 = 8.0C

Here's the exact same Vancouver station, only it's showing the maximum minimum temperatures.

Vancouvermax.png


VancouverMin.png
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Abby_wx
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Re: Graphs and Data

Postby Abby_wx » Tue Nov 28, 2017 11:25 am

Glacier wrote:
Typeing3 wrote:Would be pretty interesting to compare both the west and east coasts of Canada. I remember reading that their averages have stayed relatively the same since records began.

The maximum temperatures have not warmed, but the minimums have warmed significantly, hence the means have increased.

Warmest years (by maximums):
1) 1958 = 15.4C
2) 1934 = 15.2C
3) 2015 = 15.0C

Warmest years (by mins):
1) 2004 = 8.1C
2) 1998 = 8.0C
3) 2015 = 8.0C

Here's the exact same Vancouver station, only it's showing the maximum minimum temperatures.

Vancouvermax.png

VancouverMin.png


I wonder how much of that can be attributed to increased cloudcover. With global warming we can expect more cloudcover, as warm air holds more moisture than cold air. Clouds have a greater warming effect at night, while limiting daytime heating, particularly during the warm season.

Anecdotally, I can remember many more clear nights 25 years ago when compared to today. It seems like we rarely get a frost nowadays unless arctic air is involved. A typical clear night around here seems to cloud up very fast, as the humidity is usually quite high, so the temperature doesn't have to drop as far to reach the dewpoint. This would be less of an issue in the interior where humidity is typically quite low.
"It's not logical... it's meteorological."

Near Hwy 1 McCallum exit; elevation 55 m (180 ft).
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Typeing3
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Location: Coquitlam, Elevation 25m (80ft)

Re: Graphs and Data

Postby Typeing3 » Tue Jan 16, 2018 4:44 pm

Posting this here so it doesn't get lost in the Jan thread.
Vancouver snowfalls.PNG
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East Coquitlam. Elevation 25m(80ft).

Spring/Summer 2018
Last freeze: April 2 (-0.8C)
First 15C: March 11 (17.9C)
First 20C: March 12 (21.4C)
First 25C: April 24 (25.3C)
First 30C: May 13 (30.8C)
Hottest Temp 2018: 31.3C (May 14)

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Glacier
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Re: Graphs and Data

Postby Glacier » Wed Jan 17, 2018 9:40 am

^ I missed that discussion in the thread, but I take it that someone has noticed 4 of the top 30 days occurred in Nov-Dec 1875, including 2 of the top 5? Of course, we're talking New West, which might be a lot snowier than YVR?

EDIT: Your table is wrong. You are right for November 1875, but the December numbers are wrong... http://climate.weather.gc.ca/climate_da ... &Year=1875

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Glacier
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Re: Graphs and Data

Postby Glacier » Wed Jan 17, 2018 1:18 pm

Driest years on record at Kamloops, BC:

1) 1928 = 187.2 mm
2) 1901 = 190.5 mm
3) 1979 = 194.1 mm
4) 1987 = 194.3 mm
5) 1952 = 195.1 mm
6) 1960 = 195.1 mm
7) 2017 = 200.3 mm

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Typeing3
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Re: Graphs and Data

Postby Typeing3 » Wed Jan 17, 2018 7:02 pm

Glacier wrote:^ I missed that discussion in the thread, but I take it that someone has noticed 4 of the top 30 days occurred in Nov-Dec 1875, including 2 of the top 5? Of course, we're talking New West, which might be a lot snowier than YVR?

EDIT: Your table is wrong. You are right for November 1875, but the December numbers are wrong... http://climate.weather.gc.ca/climate_da ... &Year=1875

Sorry. Was actually Dec 1895. http://climate.weather.gc.ca/climate_da ... &Year=1895

Here is the revised table(suject to change due to errors :lol: ):
You do not have the required permissions to view the files attached to this post.
East Coquitlam. Elevation 25m(80ft).

Spring/Summer 2018
Last freeze: April 2 (-0.8C)
First 15C: March 11 (17.9C)
First 20C: March 12 (21.4C)
First 25C: April 24 (25.3C)
First 30C: May 13 (30.8C)
Hottest Temp 2018: 31.3C (May 14)

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Glacier
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Location: Okanagan

Re: Graphs and Data

Postby Glacier » Thu Jan 18, 2018 12:49 pm

The only scientific way to answer the question of which month or season was the coldest or warmest on record is to compare against the average, and then count how many standard deviations from the average.

Using Penticton (1909-2017), the most abnormal months and seasons of all time:

Coldest Seasons:
1) Fall, 1985 = 4.03 deviations below normal.
2) Spring, 1955 = 3.00 deviations below normal.
3) Winter, 1950 = -2.56
4) Winter, 1949 = -2.56
5) Summer, 1954 = -2.48

Hottest Seasons:
1) Summer, 1958 = 2.53
2) Spring, 2016 = 2.49
3) Summer, 2015 = 2.43
4) Fall, 1998 = 2.22
5) Summer, 2003 = 2.12

Coldest Months:
1) November, 1985 = -4.35
2) February, 1936 = -3.95
3) January, 1950 = -3.73
4) November, 1955 = -2.78
5) August, 1910 = -2.73

Hottest Months:
1) October, 2014 = 2.935
2) April, 2016 = 2.933
3) June, 1992 = 2.64
4) May, 1958 = 2.55
5) May, 1993 = 2.55

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Typeing3
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Location: Coquitlam, Elevation 25m (80ft)

Re: Graphs and Data

Postby Typeing3 » Sun Jan 28, 2018 11:59 am

Lots of YVR weather stats!

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East Coquitlam. Elevation 25m(80ft).

Spring/Summer 2018
Last freeze: April 2 (-0.8C)
First 15C: March 11 (17.9C)
First 20C: March 12 (21.4C)
First 25C: April 24 (25.3C)
First 30C: May 13 (30.8C)
Hottest Temp 2018: 31.3C (May 14)

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Glacier
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Posts: 2224
Location: Okanagan

Re: Graphs and Data

Postby Glacier » Wed Mar 14, 2018 2:31 pm

FACT: West Vancouver and Pitt Meadows represent 2 of the 14 places in all of Canada with an average wind speed under 6 km/h!

Least windy places in Canada:
1) Blue River, BC = average wind speed of 2.2km/h

2) Dawson, YT = 3.8 km/h

3) Princeton, BC = 4.5 km/h
4) Lindburg Landing, NWT = 4.5 km/h
5) Pemberton, BC = 4.8 km/h
6) Puntzi Mountain, BC = 4.9 km/h

7) Port Alberni, BC = 5.1 km/h
8) Burns Lake, BC = 5.2 km/h
9) Salmon Arm, BC = 5.5 km/h
10) West Vancouver, BC = 5.5 km/h
11) Nakusp, BC = 5.6 km/h
12) St. Jovite, QC = 5.7 km/h
13) Kelowna, BC = 5.7 km/h
14) Pitt Meadows, BC = 5.8 km/h

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Canada Goose
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Re: Graphs and Data

Postby Canada Goose » Wed Mar 14, 2018 3:00 pm

Glacier wrote:FACT: West Vancouver and Pitt Meadows represent 2 of the 14 places in all of Canada with an average wind speed under 6 km/h!

Hum, not a surprise for West Vancouver when you see where is the weather station...
https://www.google.ca/maps/@49.3467507, ... 312!8i6656


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