Warning: Major snow possible Tuesday through Wednesday.

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

    Forecast Issued 08:15 AM PDT Friday 20 July 2018 - Friday: Mainly sunny. Increasing cloudiness early this afternoon then 30 percent chance of showers this afternoon. High 21. UV index 7 or high. Friday night: Clearing. Low 11. Saturday: A mix of sun and cloud. High 27. UV index 8 or very high. Saturday night: Clear. Low 11. Sunday: Sunny. High 33. Sunday night: Clear. Low 13. Monday: Sunny. High 35. Monday night: Clear. Low 14. Tuesday: Sunny. High 28. Tuesday night: Clear. Low 14. Wednesday: Sunny. High 27. Wednesday night: Clear. Low 14. Thursday: Sunny. High 27.

  • Current Conditions
    Temperature
    17.2° C
    1.9 ° C/hr
    Barometer
    102.1 kPa
    0.0
    Wind
    S 0.0 km/h
    gusting 6.4 km/h
    Humidity
    72 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    17.2° C
    Heat Index
    17.2° C
    Dewpoint
    12.1° C
    UV
    2.2
    Solar
    447 W/m2
    Last Updated: 9:25:00 PDT
    Click to Refresh or See All Conditions
  • Day Almanac
    Day's Rain
    0.0 mm
    Day ET
    0.0 mm mm
    Rain Storm
    NotAvailable mm
    Civil Rise
    04:54
    Moon Phase
    First quarter (59% full)
    Civil Set
    21:55
    Day Length
    13:25:36
    Day High
    17.2° C @ 09:23 Tdy.
    Day Low
    12.7° C @ 06:23 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    102.13 kPa @ 08:28 Tdy.
    Day Low Barometer
    101.99 kPa @ 01:58 Tdy.
    Day Low Windchill
    12.7° C @ 06:23 Tdy.
    Day High Heat Index
    17.2° C @ 09:23 Tdy.
    Day High Wind Gust
    S 6.4km/h @ 08:25 Tdy.
    Day High Solar Radiation
    499W/m2 @ 09:11 Tdy.
    Day High UV Index
    2.2 @ 09:20 Tdy.

More to come… but just so we’re clear. This could be our biggest snow event of the Winter.

Alright, we have a large amount of precipitation coming our way Tuesday. (not so much tonight).

Here are some illustrations:

Here, this is the Canadian GEM (regional) model for Noon on Tuesday (18Z).

Notice the front sweeping down from the Northwest. This is a case of a low pressure center travelling down the coast, bringing precipitation and cool air along down with it and then curving into Western Washington. A pretty classic setup for snow for us.

And now for 10PM (6Z). This shows we will have received around 20mm (yellow) of precipitation between 10AM and 10PM. How much of that is rain or snow?

Around 4PM (0Z) looks like the meat of the storm and the point of strongest snow or rain. You can see strong areas of moisture over us on Vancouver Island (in red) and on the Lower Mainland. The big question will be the temperature.
This is from the NOAA/GFS model at that strongest point 4PM Tuesday (0Z).

Notice the blue line? That is the freezing point. It fluctuates over the Island but never really gets pushed out of the area through this whole event. Once again, we will be on the bubble on whether the air is warm enough to support snow. All models are in agreement that it will be strongest between 4PM and Midnight on Tuesday.

And finally, thanks to Bill for the link to this image below which shows Port Alberni with a solid 70%(red) chance of 4inches (10cm) of snow between Tuesday and Wednesay Morning.

and a 40%(green)-70% chance of more than 8 inches (20cm) of snow between Tuesday and Wednesday mornings!

And oh ya, it’s been pretty cold! We got down to -4.6C last night and -3C the night before. The Airport got down to -7C. Not record territory though. If we’re that cold tomorrow morning. Which is a possibility… then hold on to your hats and get out the shovels!

I’ll update again tonight.

4 Replies to “Warning: Major snow possible Tuesday through Wednesday.”

  1. Yes, the biggest chance for snowfall is for inland areas of the Island, but there is also a chance that it’ll make it to the west coast too.  I guess we’ll see how much of it is messy white stuff when it gets here!

  2. Ugh, i have to say that these snowstorms have shown impeccable timing this winter when it comes to messing up my Wednesday commutes to and from Tofino. 🙁

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