We set a short term record yesterday with an official high of 28.8ºC at the Airport. Alberniweather got up to 29.5ºC and many anecdotal reports had temperatures over 30ºC in the City.
You can expect more of the same today even though high cloud will shield some of the sun’s rays.
There is a possibility of thundershowers both today and again Friday. By the end of the day Friday we might actually have some fairly widespread showers. Below is the 5PM picture.
It should taper off after sundown but there could be more overnight and into Saturday morning as a fairly well organized and strong front pushes through. There could be some wind with this as well.
It should be finished by morning on Saturday and the rest of the weekend looks mainly dry except for a return to some possible afternoon showers Sunday.
We should still get over 20ºC on both Saturday and Sunday so it should be a pretty pleasant weekend.
Great Central Lake / Stamp River flow Management
The Department of Fisheries and Oceans advises local government that they, in partnership with Catalyst who operates the dam at Great Central Lake, will be ‘turning down’ the flow out of the Lake in order to keep more water in the lake for later in the summer. Here is part of their information release:
The Somass Fish-Flow Communication Committee has recommended a reduction in the rate of water release from Great Central Lake for the purpose of conserving water for later in the summer. Normally, if possible, the summer/fall Stamp River flow is maintained at 15 cubic meters per second (cms). Currently, the Stamp River flow is 13 cms. Larry Cross, Catalyst will ramp the flow down by 1 cms each day for the next few days until the flow reaches 10 cms.
I have heard anedotally that Sproat Lake is already at “August” type levels. With no snowpack to keep the lakes and rivers flowing and cool it will be crucial to conserve water like this, especially for the returning Sockeye and then Chinook and Coho as well as Steelhead and others. If you tube on the Stamp you might want to get out early and often since pretty soon it might be too low to get a tube down many parts.
I will update again tomorrow. Apologies for the downtime on the website yesterday. I guess lots of people were wanting to check out the temperature and it took down the site. I am going to investigate getting a more powerful web server since it seems I keep running up against the limits of the provider I have now.
Oh, and last but not least, check out this amazing picture captured a few days ago by a resident in Beaver Creek!
(Forecast is really easy the next few days… SUN and HOT. :))
April was strange in that it wasn’t actually that strange. It was slightly (very slightly) warmer than normal but really I would just describe it as normal as far as temperatures go. It was notably dry, with just 53% of the normal precipitation recorded. Snowpack is a lost cause now. Anyone with an eye to Mt. Arrowsmith will know that the South Island will basically have no snowpack this year. April did nothing to help that situation.
Anecdotally, I have heard that Sproat Lake is already at “August Lows”. This isn’t a big surprise again since anecdotally, if you look at Mt. Arrowsmith, it is a picture more usually seen in August rather than May.
The cause of this lack of snow and abnormally warm winter? “The Blob”… which is a kind of silly moniker given to the abnormally warm water off of the West Coast of North America.
But as was expertly pointed out by Cliff Mass on his weather blog a few weeks back… be careful of how you attribute cause and effect.
As he points out in a blog yesterday, what is truly stunning from this year is what the lack of snow was *not* caused by. It was *not* caused by a lack of precipitation, which has been the case in every other year of low snowfall. The cause has been normal precipitation falling mostly as rain at all elevations.
In his words:
There is simply no analog for last winter and this spring in the Northwest. It stands by itself.
Dr. Mass is a true skeptic when it comes to attributing our strange weather of the past few years to anthropogenic climate change. I say “true” skeptic because he backs his assertions up with peer reviewed literature and copious personal expertise. However, I do think he is often overly conservative to a fault. In my mind, as global warming and climate change is already well established to be happening then “natural variability” is by definition being affected every day by that global warming and climate change that has been observationally and experimentally proven to be occurring.
As for “the Blob”. Dr. Mass has a great post on how the mainstream media and even University press departments have misdirected the public on how it actually got there and how it is affecting our weather patterns.
Basically, the “blob” has been around for a couple years and is a result of persistent high pressure in the Eastern North Pacific area which has allowed for much clearer skies and thus greater solar input into the sea. This has allowed the sea to warm considerably and it now is affecting weather patterns. So what has been the cause of those persistent high pressure areas? Some (including me) might attribute it to an overly curved and stationary jet stream that may be caused by diminishing ice in the Arctic (and thus, Anthropogenic Global Warming). Another theory, which is supported by recent research, is that the high pressure pattern is being caused by abnormally warm subtropic ocean. Science is a wonderfully varied place. What all agree on (or more precisely none attribute to) is that the blob is *not* the cause of the warm weather or the cold in the east US but is instead a direct result of the same pattern.
No South Island Snowpack
The snowpack data and graph below are all that we need to see… that is, if you can even see the dark blue line on the bottom that represents this years snowfall.
Snow basin indices in the southwest portion of the province remain extremely low, continuing the low snow pack conditions of the winter of 2014-2015. Basins with record low snow basin indices for the May 1st snow survey (since 1985) include the West and East Kootenay, Okanagan, Similkameen, Lower Fraser, South Coast, and Vancouver Island (Table 1).
The average of all provincial snow water equivalent measurements for May 1st is 69% of average conditions. This is the lowest province-wide average for the May 1st bulletin in the past 31 years of record and is primarily due to the record low snow packs in the southern areas of the province.
The snowpack locally is 14% of normal. That is for the whole Vancouver Island region, north and south.
And here is the kicker we will have to prepare for:
With extremely low snow packs in the Lower Fraser, South Coast, Similkameen, East Kootenay, Skagit and Vancouver Island, runoff from snow melt will be limited. Seasonal low flows are expected to occur earlier than normal this year, very low flows can be expected in the summer unless significant rainfall occurs through the spring and summer.
This is a serious problem… we are still much luckier than, say, Sao Paulo Brazil, which is bringing in the military in case there is unrest if the City of millions runs out of water in the next few months. Or California which went under mandatory restrictions as of May 1st. We must work to avoid those situations. We have no excuse to say we were not warned.
Rainfall measuring woes continue at Airport.
Once again, the Airport station only recorded a small set of rainfall data. I have been unable to get in touch with anyone at Environment Canada to fix this… if you know anyone, let me know.
There is an approximately 90% chance that El Niño will continue through Northern Hemisphere summer 2015, and a greater than 80% chance it will last through 2015….
…. Collectively, these features reflect weak to moderate strength El Niño conditions.
There is discussion in the forecast that some indicators are showing a possible increase in the strength of the El Niño event as the months progress. However, there is “considerable uncertainty” with the forecast especially at this time of year, so they are simply expecting El Niño conditions to continue but are not predicting it to strengthen at this time.
You can see the El Niño anomaly showing up in the rectangular box in the Sea Surface Temperature Outlooks in the next section. One thing to note, the waters of the Eastern Pacific are already abnormally warm as a whole. The El Niño area is even more abnormally warm. In other times… in all, there is an incredible amount of heat energy being released right now from the Pacific.
Outlooks — Spring and Summer looking warm and dry.
Below is the Sea Surface Anomaly map. I have retained last months prediction for the MJJ time period on the bottom. Notice the later period shows significantly more warmth in the El Niño rectangular box along the Equator. The persistent and abnormal warm water along the entire West Coast of the Americas is quite something, but especially the Northern portions.
City Stations Temperature Difference from normal: +1.3° C, +0.1º C, +0.26ºC
Official (Airport) Temperature Difference from normal: -0.4º C, -0.1ºC, +0.3ºC
City Stations Precipitation difference normal: -64.9 mm (54.8% of normal)
Official (Airport) Precipitation difference from normal:
—- not enough data
*Denotes incomplete data for the month
Comparison to recent Aprils at Alberniweather (unless specified)