Centretown Observatory:

Yesterday

Times in Eastern Daylight Time (EDT = GMT-4)

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STATISTICS from CTO Weather Centre - Sunday, May 18, 2025
ALMANAC:

Event:	Time:		Moon:
Sunrise:	05:29
Sunset:	20:30
Length of Day:	15:01

Moonrise:	01:20
Moonset:	10:06
Moonlight:	08:46
Moon Phase:	Waning Gibbous	(age 21 d.)

EVENTS YESTERDAY (2):

Eruption of Mt. St. Helens - 2025-05-18 @ 01:00 (+1d, 4h, 0m)
On this day in 1980 (now 45 years ago), Mount Saint Helens, a beautiful, symmetrical stratovolcano cone often referred to as "the Fuji of the Northwest," erupted explosively after months of signs that it was waking up. The eruption was triggered by a huge landslide, and the mountain blew away its summit and the southern quadrant of its cone. In many areas, for the next couple of days, it was pitch-black from the clouds of volcanic dust. Huge lahars washed down many rivers, and the showpiece of the area, Spirit Lake, was drowned in boiling debris. The eruption was extensively covered by international media. Subsequent smaller eruptions carried ash up into Canada. The sound of the eruption was heard up to 320 kilometres away, including by the Author, as he delivered papers on southern Vancouver Island.

Victoria Day - 2025-05-19 @ 00:00 (+0d, 5h, 0m)
Canada takes a holiday on this date, in celebration of the life and accomplishments of Her Majesty, Queen Victoria (1819-05-24 - 1901.01.22).

DAILY SUMMARY: MAXIMA / MINIMA:

Reading

Max

Time

Min

Time

Normal

RecHi

RecLo

High Temp

01:09

2017

2002

Low Temp

23:44

2017

2023

Humidex

n/a

2021

Wind Chill

n/a

Dew Point

09:24

00:49

2015

2023

Relative Humidity

09:24

15:44

2025

2023

Barometric Pressure

22:54

02:54

2023

2025

Winds

11:34

2017

- from

DAILY SUMMARY: MEANS AND TOTALS:

Reading	Mean		Normal		RecHi		YY	RecLo		YY
Temperature							2017			2002
Dew Point							2015			2023
Relative Humidity	84	%	51	%	84	%	2025	36	%	2018
Barometric Pressure							2023			2017
Winds							2023			2002
- from	E		E		NNW			N


Daily Total	Total	Normal		RecMost	YY
Rain					2022
Snow					2002
- Water Equivalent					2002
Precipitation					2022
Sunshine	00:35	06:36	h	15:10	2018

Temperatures Yesterday:

Barometer Yesterday:

Relative Humidity Yesterday:

Dew Point Yesterday:

Wind Speed Yesterday:

Wind Direction Yesterday:

Live Data--Yesterday:
Time	Condition	Temp	Hx	WC	BP	RH	Precip	SS	DP	Winds
01:04	Cloudy					77%	mm	0		S @
01:09	Cloudy					77%	mm	0		S @
01:14	Cloudy					77%	mm	0		SSE @
01:19	Cloudy					77%	mm	0		SE @
01:24	Cloudy					79%	mm	0		SSE @
01:29	Cloudy					81%	mm	0		SSE @
01:34	Cloudy					85%	mm	0		SW @
01:39	Cloudy					88%	mm	0		S @
01:44	Cloudy					89%	mm	0		SE @
01:49	Cloudy,Rain					91%	mm	0		S @
01:54	Cloudy,Rain					92%	mm	0		SSE @
01:59	Cloudy,Rain					93%	mm	0		SE @
02:04	Cloudy,Rain					93%	mm	0		S @
02:09	Cloudy					93%	mm	0		SE @
02:14	Cloudy					93%	mm	0		S @
02:19	Cloudy					94%	mm	0		ESE @
02:24	Cloudy					94%	mm	0		S @
02:29	Cloudy					94%	mm	0		SSE @
02:34	Cloudy					95%	mm	0		S @
02:39	Cloudy					95%	mm	0		SSE @
02:44	Cloudy					95%	mm	0		S @
02:49	Cloudy,Rain					95%	mm	0		WSW @
02:54	Cloudy,Rain					95%	mm	0		SSE @
02:59	Cloudy,Rain					95%	mm	0		SSE @
03:04	Cloudy,Rain					95%	mm	0		S @
03:09	Cloudy					95%	mm	0		SE @
03:14	Cloudy					95%	mm	0		SE @
03:19	Cloudy					95%	mm	0		SSE @
03:24	Cloudy					95%	mm	0		SW @
03:29	Cloudy					95%	mm	0		S @
03:34	Cloudy					94%	mm	0		SSW @
03:39	Cloudy					95%	mm	0		SSW @
03:44	Cloudy					95%	mm	0		SSW @
03:49	Cloudy					95%	mm	0		SSW @
03:54	Cloudy					95%	mm	0		E @
03:59	Cloudy					95%	mm	0		SSW @
04:04	Cloudy					95%	mm	0		S @
04:09	Cloudy					95%	mm	0		SSE @
04:14	Cloudy					94%	mm	0		S @
04:19	Cloudy					94%	mm	0		S @
04:24	Cloudy					94%	mm	0		S @
04:29	Cloudy					94%	mm	0		SSW @
04:34	Cloudy,Rain					94%	mm	0		ESE @
04:39	Cloudy,Rain					94%	mm	0		SSE @
04:44	Cloudy,Rain					94%	mm	0		SSE @
04:49	Cloudy,Rain					94%	mm	0		SE @
04:54	Cloudy					94%	mm	0		SSW @
04:59	Cloudy					94%	mm	0		SW @
05:04	Cloudy					94%	mm	0		SSW @
05:09	Twilight					95%	mm	0		S @
05:14	Twilight					95%	mm	0		S @
05:19	Twilight					94%	mm	0		SSW @
05:24	Twilight					94%	mm	0		SW @
05:29	Cloudy					94%	mm	0		SSW @
05:34	Cloudy					94%	mm	0		SW @
05:39	Cloudy					95%	mm	0		S @
05:44	Sunny					95%	mm	5		S @
05:49	Sunny					95%	mm	5		SSE @
05:54	Sunny					95%	mm	5		SSE @
05:59	Sunny					95%	mm	5		SSE @
06:04	Sunny					95%	mm	5		S @
06:09	Sunny					95%	mm	5		SE @
06:14	Cloudy					95%	mm	0		SSW @
06:19	Cloudy					95%	mm	0		S @
06:24	Cloudy					95%	mm	0		S @
06:29	Cloudy					95%	mm	0		S @
06:34	Cloudy					95%	mm	0		SSW @
06:39	Cloudy					94%	mm	0		SSW @
06:44	Cloudy					94%	mm	0		SSW @
06:49	Cloudy					94%	mm	0		SSW @
06:54	Cloudy					94%	mm	0		S @
06:59	Cloudy					94%	mm	0		SSW @
07:04	Cloudy					94%	mm	0		SSW @
07:09	Cloudy					94%	mm	0		SSW @
07:14	Cloudy					94%	mm	0		S @
07:19	Cloudy					94%	mm	0		SSW @
07:24	Cloudy					94%	mm	0		SSW @
07:29	Cloudy					94%	mm	0		S @
07:34	Cloudy,Rain					94%	mm	0		S @
07:39	Cloudy,Rain					94%	mm	0		S @
07:44	Cloudy,Rain					94%	mm	0		S @
07:49	Cloudy,Rain					94%	mm	0		S @
07:54	Cloudy					94%	mm	0		SW @
07:59	Cloudy,Rain					94%	mm	0		SSW @
08:04	Cloudy,Rain					94%	mm	0		SSW @
08:09	Cloudy,Rain					94%	mm	0		SE @
08:14	Cloudy,Rain					94%	mm	0		S @
08:19	Cloudy					94%	mm	0		S @
08:24	Cloudy					94%	mm	0		SSE @
08:29	Cloudy					95%	mm	0		S @
08:34	Cloudy,Rain					95%	mm	0		S @
08:39	Cloudy,Rain					95%	mm	0		SSE @
08:44	Cloudy,Rain					95%	mm	0		S @
08:49	Cloudy,Rain					95%	mm	0		S @
08:54	Cloudy,Rain					96%	mm	0		S @
08:59	Cloudy,Rain					96%	mm	0		S @
09:04	Cloudy,Rain					96%	mm	0		S @
09:09	Cloudy,Rain					96%	mm	0		S @
09:14	Cloudy,Rain					96%	mm	0		S @
09:19	Cloudy					96%	mm	0		S @
09:24	Cloudy					97%	mm	0		SSE @
09:29	Cloudy,Rain					96%	mm	0		S @
09:34	Cloudy,Rain					97%	mm	0		S @
09:39	Cloudy,Rain					97%	mm	0		S @
09:44	Cloudy,Rain					97%	mm	0		SSE @
09:49	Cloudy					96%	mm	0		E @
09:54	Cloudy					96%	mm	0		ESE @
09:59	Cloudy					96%	mm	0		ESE @
10:04	Cloudy					93%	mm	0		SSE @
10:09	Cloudy					92%	mm	0		SSW @
10:14	Cloudy					91%	mm	0		SSE @
10:19	Cloudy					89%	mm	0		ESE @
10:24	Cloudy					91%	mm	0		SSE @
10:29	Cloudy					92%	mm	0		E @
10:34	Cloudy,Rain					92%	mm	0		SE @
10:39	Cloudy,Rain					92%	mm	0		SSE @
10:44	Cloudy,Rain					91%	mm	0		SSE @
10:49	Cloudy,Rain					91%	mm	0		S @
10:54	Cloudy					90%	mm	0		SSE @
10:59	Cloudy					89%	mm	0		E @
11:04	Cloudy					88%	mm	0		E @
11:09	Cloudy					88%	mm	0		ESE @
11:14	Cloudy					87%	mm	0		SE @
11:19	Cloudy					87%	mm	0		SSE @
11:24	Cloudy					88%	mm	0		SSW @
11:29	Cloudy					86%	mm	0		E @
11:34	Cloudy					85%	mm	0		S @
11:39	Cloudy					86%	mm	0		E @
11:44	Cloudy					84%	mm	0		SSE @
11:49	Cloudy					85%	mm	0		ESE @
11:54	Cloudy					85%	mm	0		SE @
11:59	Cloudy					84%	mm	0		ESE @
12:04	Cloudy					83%	mm	0		E @
12:09	Cloudy					83%	mm	0		S @
12:14	Cloudy					83%	mm	0		SE @
12:19	Cloudy					82%	mm	0		ESE @
12:24	Cloudy					83%	mm	0		E @
12:29	Cloudy					81%	mm	0		E @
12:34	Cloudy					81%	mm	0		ENE @
12:39	Cloudy					79%	mm	0		E @
12:44	Cloudy					79%	mm	0		SSE @
12:49	Cloudy					80%	mm	0		ESE @
12:54	Cloudy					79%	mm	0		S @
12:59	Cloudy					77%	mm	0		SSW @
13:04	Cloudy					79%	mm	0		SSE @
13:09	Cloudy					78%	mm	0		E @
13:14	Cloudy					77%	mm	0		ESE @
13:19	Cloudy					77%	mm	0		SE @
13:24	Cloudy					77%	mm	0		SSE @
13:29	Cloudy					76%	mm	0		E @
13:34	Cloudy					76%	mm	0		E @
13:39	Cloudy					76%	mm	0		S @
13:44	Cloudy					74%	mm	0		WSW @
13:49	Cloudy					73%	mm	0		SE @
13:54	Cloudy					74%	mm	0		SE @
13:59	Cloudy					73%	mm	0		S @
14:04	Cloudy					75%	mm	0		SSE @
14:09	Cloudy					73%	mm	0		ESE @
14:14	Cloudy					74%	mm	0		E @
14:19	Cloudy					74%	mm	0		SE @
14:24	Cloudy					73%	mm	0		SSE @
14:29	Cloudy					73%	mm	0		SE @
14:34	Cloudy					74%	mm	0		SSE @
14:39	Cloudy					73%	mm	0		SSW @
14:44	Cloudy					75%	mm	0		SSE @
14:49	Cloudy					74%	mm	0		SE @
14:54	Cloudy					74%	mm	0		E @
14:59	Cloudy					75%	mm	0		S @
15:04	Cloudy					75%	mm	0		ESE @
15:09	Cloudy					74%	mm	0		ENE @
15:14	Cloudy					74%	mm	0		ESE @
15:19	Cloudy					74%	mm	0		SSE @
15:24	Cloudy					73%	mm	0		SSE @
15:29	Cloudy					73%	mm	0		SE @
15:34	Cloudy					71%	mm	0		E @
15:39	Cloudy					71%	mm	0		E @
15:44	Cloudy					70%	mm	0		ENE @
15:49	Cloudy					72%	mm	0		E @
15:54	Cloudy					72%	mm	0		E @
15:59	Cloudy					73%	mm	0		SSE @
16:04	Cloudy					71%	mm	0		E @
16:09	Cloudy					72%	mm	0		SSE @
16:14	Cloudy					72%	mm	0		SE @
16:19	Cloudy					73%	mm	0		S @
16:24	Cloudy					74%	mm	0		SSE @
16:29	Cloudy					74%	mm	0		ENE @
16:34	Cloudy					74%	mm	0		SSE @
16:39	Cloudy					74%	mm	0		SE @
16:44	Cloudy					75%	mm	0		SSE @
16:49	Cloudy					74%	mm	0		SSE @
16:54	Cloudy					74%	mm	0		S @
16:59	Cloudy					73%	mm	0		S @
17:04	Cloudy					74%	mm	0		ESE @
17:09	Cloudy					74%	mm	0		SSE @
17:14	Cloudy					73%	mm	0		SW @
17:19	Cloudy					73%	mm	0		S @
17:24	Cloudy					74%	mm	0		SSE @
17:29	Cloudy					73%	mm	0		SSE @
17:34	Cloudy					73%	mm	0		SSE @
17:39	Cloudy					72%	mm	0		SE @
17:44	Cloudy					72%	mm	0		ENE @
17:49	Cloudy					73%	mm	0		ESE @
17:54	Cloudy					73%	mm	0		SE @
17:59	Cloudy					73%	mm	0		S @
18:04	Cloudy					72%	mm	0		SE @
18:09	Cloudy					73%	mm	0		SE @
18:14	Cloudy					73%	mm	0		S @
18:19	Cloudy					74%	mm	0		SE @
18:24	Cloudy					74%	mm	0		ENE @
18:29	Cloudy					74%	mm	0		E @
18:34	Cloudy					75%	mm	0		E @
18:39	Cloudy					74%	mm	0		E @
18:44	Cloudy					74%	mm	0		E @
18:49	Cloudy					75%	mm	0		SSE @
18:54	Cloudy					74%	mm	0		SSE @
18:59	Cloudy					74%	mm	0		SSE @
19:04	Cloudy					74%	mm	0		ENE @
19:09	Cloudy					73%	mm	0		E @
19:14	Cloudy					74%	mm	0		E @
19:19	Cloudy					74%	mm	0		SE @
19:24	Cloudy					73%	mm	0		S @
19:29	Cloudy					74%	mm	0		SE @
19:34	Cloudy					75%	mm	0		S @
19:39	Cloudy					75%	mm	0		ESE @
19:44	Cloudy					74%	mm	0		ESE @
19:49	Cloudy					74%	mm	0		SE @
19:54	Cloudy					74%	mm	0		SE @
19:59	Cloudy					75%	mm	0		ESE @
20:04	Cloudy					74%	mm	0		ENE @
20:09	Sunny					75%	mm	5		S @
20:14	Cloudy					75%	mm	0		S @
20:19	Cloudy					75%	mm	0		SSE @
20:24	Cloudy					75%	mm	0		ESE @
20:29	Cloudy					75%	mm	0		S @
20:34	Twilight					75%	mm	0		ESE @
20:39	Twilight					75%	mm	0		SSE @
20:44	Twilight					75%	mm	0		S @
20:49	Twilight					74%	mm	0		SSE @
20:54	Twilight					74%	mm	0		SSE @
20:59	Twilight					74%	mm	0		SE @
21:04	Cloudy					74%	mm	0		SSE @
21:09	Cloudy					73%	mm	0		SE @
21:14	Cloudy					74%	mm	0		S @
21:19	Cloudy					74%	mm	0		SE @
21:24	Cloudy					74%	mm	0		SSW @
21:29	Cloudy					74%	mm	0		SSE @
21:34	Cloudy					74%	mm	0		SSW @
21:39	Cloudy					75%	mm	0		SSE @
21:44	Cloudy					74%	mm	0		SSW @
21:49	Cloudy					74%	mm	0		SE @
21:54	Cloudy					73%	mm	0		SSE @
21:59	Cloudy					74%	mm	0		S @
22:04	Cloudy					73%	mm	0		SE @
22:09	Cloudy					73%	mm	0		SE @
22:14	Cloudy					73%	mm	0		SE @
22:19	Cloudy					73%	mm	0		ESE @
22:24	Cloudy					72%	mm	0		SSE @
22:29	Cloudy					72%	mm	0		S @
22:34	Cloudy					71%	mm	0		ESE @
22:39	Cloudy					72%	mm	0		SE @
22:44	Cloudy					73%	mm	0		SE @
22:49	Cloudy					73%	mm	0		SSE @
22:54	Clear					74%	mm	0		SSE @
22:59	Clear					74%	mm	0		S @
23:04	Clear					74%	mm	0		SE @
23:09	Clear					74%	mm	0		SE @
23:14	Clear					74%	mm	0		E @
23:19	Clear					74%	mm	0		SSE @
23:24	Clear					74%	mm	0		E @
23:29	Clear					73%	mm	0		SE @
23:34	Cloudy					74%	mm	0		SE @
23:39	Cloudy					73%	mm	0		ESE @
23:44	Cloudy					73%	mm	0		ESE @
23:49	Cloudy					74%	mm	0		SSE @
23:54	Cloudy					73%	mm	0		SE @
23:59	Cloudy					74%	mm	0		ESE @
00:04	Cloudy					74%	mm	0		SE @
00:09	Cloudy					73%	mm	0		SE @
00:14	Cloudy					73%	mm	0		SE @
00:19	Cloudy					73%	mm	0		SE @
00:24	Cloudy					72%	mm	0		E @
00:29	Cloudy					73%	mm	0		SSE @
00:34	Cloudy					72%	mm	0		SSE @
00:39	Cloudy					71%	mm	0		E @
00:44	Cloudy					71%	mm	0		SSE @
00:49	Cloudy					71%	mm	0		SE @
00:54	Cloudy					71%	mm	0		SSE @

Yesterday						84%		00:35		E @

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