Updated Hydrometric Data Charts for Lake Okanagan

User avatar
gswaters
Posts: 35
Joined: Mar 14th, 2020, 7:40 am

Updated Hydrometric Data Charts for Lake Okanagan

Post by gswaters »

I have recently started producing charts for daily-averaged Geodetic Height and Water Temperature for Lake Okanagan based on Environment Canada data collected at the Kelowna Station (there are other stations located at Vernon and Penticton as well).

The Geodetic Height is measured every 15 minutes and the Water Temperature is measured every 6o minutes over the 24-hour day by an Environment Canada sensor. I take the entire daily raw data set and then average it over the 24-hour period to get a daily average.

The charts start on April 1, 2020 (Why then? COVID-19 boredom!) and continue to the most recent complete day, currently May 20, 2020.

I tweet out the daily update from @WestKelownian, usually in the morning.

Here is today's chart for the Geodetic Height (in meters) for Lake Okanagan. On May 20, 2020, the daily-averaged Geodetic Height was 342.24 m. Lake Okanagan is considered "full" when the Geodetic Height is 342.48 m. Thus, as of May 20, 2020, the water level of Lake Okanagan is about 24 cm shy of being considered "full."

The actual depth of the water column at the Kelowna Station is determined by subtracting 340.26 from the Geodetic Height. Thus, the daily-averaged depth of the Lake at the Kelowna Station on May 20, 2020 was 1.98 meters.

height.png


Here is the corresponding chart for the daily-averaged Water Temperature (in degrees C) recorded at the Kelowna Station. The daily-averaged temperature for May 20, 2020 was 12.98 C. The Lake seems to be nicely warming. I look forward to jumping in ... once it gets to nearer to 20 C!

temp.png
You do not have the required permissions to view the files attached to this post.
LANDM
Walks on Forum Water
Posts: 11576
Joined: Sep 18th, 2009, 11:58 am

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by LANDM »

Great post. Thanks for the info!! :up:
You and 71 others Like this post
stuphoto
Grand Pooh-bah
Posts: 2754
Joined: Sep 18th, 2014, 7:41 am

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by stuphoto »

Just wondering, and please consider me as a complete rookie on the subject.

When the lake is considered as Full, is that based on historic levels, the point right before it overflows the banks or something else?
Does anyone have the data from the floods a few years ago as a comparison?
User avatar
Frisk
Guru
Posts: 9073
Joined: Apr 24th, 2011, 9:32 am

Okanagan lake level

Post by Frisk »

Any guesses on how high the lake will peak this year? I'm going to say 343.00m.
They've been dumping a ton of water out of the penticton channel the past few days, presumably in anticipation of the hot weather next week. The snowpack on the east side of the valley is still very high in the upper elevations.
You do not have the required permissions to view the files attached to this post.
User avatar
vegas1500
Grand Pooh-bah
Posts: 2318
Joined: Aug 4th, 2013, 6:53 pm

Re: Okanagan lake level

Post by vegas1500 »

No guesses but I will bet no matter where it peaks, people will *bleep* about it and that the region did a *bleep* job “controlling it”.
User avatar
GordonH
Grumpy Old Bleep
Posts: 30821
Joined: Oct 4th, 2008, 7:21 pm

Re: Okanagan lake level

Post by GordonH »

I believe it's being discussed here:
https://forums.castanet.net/viewtopic.php?f=23&t=85312
"You've Gotta' Ask Yourself A Question. 'Do I Feel Lucky?' Well Do Ya...PUNK?" Harry Callahan
I don't care whether people like me or dislike me. I'm not on earth to win any popularity contests.
occasional thoughts
Grand Pooh-bah
Posts: 2744
Joined: Sep 6th, 2006, 11:07 pm

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by occasional thoughts »

Low vision here, I can't make out some of the names and numbers on the various graphs, above. So my question, what is the usual or standard or normal elevation of the lake? I get it that it fluctuates based on the season, inflow, outflow, evaporation, etc. but is there a "default". Maybe the concept of "full pool".
User avatar
GordonH
Grumpy Old Bleep
Posts: 30821
Joined: Oct 4th, 2008, 7:21 pm

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by GordonH »

occasional thoughts wrote:Low vision here, I can't make out some of the names and numbers on the various graphs, above. So my question, what is the usual or standard or normal elevation of the lake? I get it that it fluctuates based on the season, inflow, outflow, evaporation, etc. but is there a "default". Maybe the concept of "full pool".


Full pool is 342.48

As of this morning it was at 342.318
"You've Gotta' Ask Yourself A Question. 'Do I Feel Lucky?' Well Do Ya...PUNK?" Harry Callahan
I don't care whether people like me or dislike me. I'm not on earth to win any popularity contests.
occasional thoughts
Grand Pooh-bah
Posts: 2744
Joined: Sep 6th, 2006, 11:07 pm

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by occasional thoughts »

Thank you, GH. So, Frisk, you're not going out on a very large limb in predicting 343.00 (metres above sea level I presume). Well, maybe if I convert it into English (lol!), 0.52m above full pool is 20.8". That's actually a fair amount if I'm understanding the numbers correctly.

I was atop Okanagan Mountain at Divide Lake on Wed. No snow anywhere around there, some seen on distant higher peaks.
User avatar
Lady tehMa
Buddha of the Board
Posts: 19387
Joined: Aug 2nd, 2005, 3:51 pm

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by Lady tehMa »

occasional thoughts wrote:Thank you, GH. So, Frisk, you're not going out on a very large limb in predicting 343.00 (metres above sea level I presume). Well, maybe if I convert it into English (lol!), 0.52m above full pool is 20.8". That's actually a fair amount if I'm understanding the numbers correctly.

I was atop Okanagan Mountain at Divide Lake on Wed. No snow anywhere around there, some seen on distant higher peaks.


I was up near Big White on Saturday and there was snow on the higher elevations.
PLEASE use spellcheck. If that is too hard, consider installing the Grammarly (free!) app that will not only spellcheck for you (AND offer corrections!) but also make sure that your sentences are grammatically correct.

You're welcome.
bigtimeoperations
Board Meister
Posts: 433
Joined: Nov 18th, 2018, 8:22 pm

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by bigtimeoperations »

Anywhere below 1500 meters elevation has only trace amounts of snow left. The other day I was up at Postill Lake (elevation 1400m) no snow whatsoever. The ridge on the east side of the lake had visible patches left, and that ridge is probably 1600 meters at most. That is likely the highest elevation in the Mill Creek watershed. As noted already, tons of snow left up by the Greystokes, which feeds Mission Creek, and is one of the highest areas to drain into Okanagan Lake. All of Big White drains into the Kettle basin, not the Okanagan.
Kelowna is the capital of Alberta
User avatar
Frisk
Guru
Posts: 9073
Joined: Apr 24th, 2011, 9:32 am

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by Frisk »

It's at full pool now, seems like it might go over a bit. I don't think it'll get anywhere near 2017 type levels though.
You do not have the required permissions to view the files attached to this post.
User avatar
oldtrucker
Guru
Posts: 6818
Joined: Nov 24th, 2013, 3:19 pm

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by oldtrucker »

Ah...it's not full until it gets to glacial lake Penticton full.
Some may view my politically incorrect opinions as harsh and may be offended by them. Some think political correctness will be our undoing. Zero cuckery. You and 917 others hate this post.
seewood
Lord of the Board
Posts: 3340
Joined: May 29th, 2013, 2:08 pm

Re: Updated Hydrometric Data Charts for Lake Okanagan

Post by seewood »

High water in 2017 was 343.250 meters asl

https://www.cordemergency.ca/updates/ok ... 07-27-1119
I am not wealthy but I am rich
User avatar
gswaters
Posts: 35
Joined: Mar 14th, 2020, 7:40 am

Lake Okanagan is now considered "full"

Post by gswaters »

I am posting updated (12:00am PST May 30, 2020) graphs of daily-averaged Geodetic Height and Water Temp for Lake Okanagan at Kelowna from Environment Canada Hydrometric Data.

As of May 29, 2020, the Geodetic Height of the Lake is 342.49 m (the depth at Kelowna is 2.23 m). Lake Okanagan is considered “full” at 342.48 m.

height.png


As of May 29, 2020, the temperature of the Lake is 13.44 C.

temp.png


For those interested I post daily updates on Twitter at @WESTKELOWNIAN
You do not have the required permissions to view the files attached to this post.

Return to “2020 Flood Watch”