Confidence grows for snow Saturday/Sunday – will be updating later – and snowpack!

  • Vancouver Island Inland Sections Forecast - No watches or warnings in effect.

    Forecast Issued 05:00 AM PDT Monday 21 May 2018 - Monday: Mainly cloudy. Clearing near noon. Fog patches dissipating this morning. High 24. UV index 7 or high. Monday night: Clear. Low 9. Tuesday: Mainly sunny. High 28. Tuesday night: Clear. Low 12. Wednesday: Sunny. High 28. Wednesday night: Cloudy periods. Low 11. Thursday: A mix of sun and cloud. High 26. Thursday night: Cloudy periods. Low 11. Friday: Sunny. High 26. Friday night: Cloudy periods. Low 11. Saturday: A mix of sun and cloud. High 20. Saturday night: Cloudy periods. Low 11. Sunday: Cloudy. High 18.

  • Current Conditions
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    10.0° C
    0.1 ° C/hr
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    101.86 kPa
    0.0
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    gusting 0.0 km/h
    Humidity
    91 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    10.0° C
    Heat Index
    10.0° C
    Dewpoint
    8.6° C
    UV
    0.0
    Solar
    10 W/m2
    Last Updated: 6:05:00 PDT
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  • Day Almanac
    Day's Rain
    0.0 mm
    Day ET
    0.0 mm mm
    Rain Storm
    NotAvailable mm
    Civil Rise
    04:47
    Moon Phase
    First quarter (43% full)
    Civil Set
    21:45
    Day Length
    13:15:49
    Day High
    10.5° C @ 00:22 Tdy.
    Day Low
    9.7° C @ 02:09 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    101.87 kPa @ 02:58 Tdy.
    Day Low Barometer
    101.82 kPa @ 00:00 Tdy.
    Day Low Windchill
    9.7° C @ 02:09 Tdy.
    Day High Heat Index
    10.5° C @ 00:22 Tdy.
    Day High Wind Gust
    S 3.1km/h @ 00:20 Tdy.
    Day High Solar Radiation
    11W/m2 @ 06:03 Tdy.
    Day High UV Index
    0.0 @ 00:00 Tdy.

We are going to get a bit of a break from the wet snowy weather today and Friday but the weekend is still a big question mark.

The GFS out of The University of Washington has been going strongly in favour of heavy snow late Saturday and into Sunday. None of the other models, the Canadian, the NAM or others have shown this, which is why up until today you did not see anything in the official forecast.

The UWGFS has now carried this prediction from its long range into its short range (less than three days) forecast. This gives it a lot more weight.

I’m going to post an image from a new source this morning. This image is still from UW, but it is generated from an Ensemble. That means multiple models from UW, the GFS, Canadian, Japanese, UK and others are all run at once and averaged to come up with a best estimate from all, called ‘centroid’.

They are not as fine grained and detailed as the UW GFS by itself, but they give a good idea of the overall grasp the various computer models have.

Here is the precipitation and temperature map for Saturday from the centroid.

20140220-071001.jpg

20140220-071120.jpg

Blue means at or very near freezing and the precipitation map is self explanatory. As you can see, the conditions are ripe for snow.

I will not be posting the normal UW snow map until the new run this morning. This will be a crucial run as it will be the second of the short range runs and we will get to see just how confident all of the models are.

Take this as a heads up that significant snow could still be in the forecast for the east coast of the island especially late Saturday and into Sunday.

I will update this post later this morning ones the runs are complete.

And oh ya, GO CANADA!

I almost forgot! I wanted to include the latest snowpack graph! It is looking much much healthier. I’m hoping we can breath a bit easier now.

20140220-072953.jpg

As you can see it has jumped up considerably thanks to the past few days. It’s still nowhere near normal, but it’s not historically low either. We will be going into another extended dry stretch after this weekend, but it should not diminish too much. As long as we don’t get any early warm rain systems, we are now at least somewhat protected from disaster in the summer. And Mt. Washington is happy too.