Wed. Aug 22nd, 2018

Inversion Time – Flurries then Snow then Rain

  • Vancouver Island Inland Sections Forecast - SPECIAL AIR QUALITY STATEMENT IN EFFECT
    Issued: 9:31 PM PDT Tuesday 21 August 2018

    Forecast Issued 4:00 PM PDT Tuesday 21 August 2018 - Tuesday night: Partly cloudy. Widespread smoke. Low 12. Wednesday: A mix of sun and cloud. Widespread smoke becoming local smoke near noon. High 31. Humidex 34. UV index 7 or high. Wednesday night: Partly cloudy. Local smoke. Low 12. Thursday: Cloudy with 30 percent chance of showers. High 23. Thursday night: Cloudy periods with 30 percent chance of showers. Low 12. Friday: A mix of sun and cloud. High 22. Friday night: Cloudy with 60 percent chance of showers. Low 12. Saturday: Cloudy with 60 percent chance of showers. High 20. Saturday night: Cloudy with 30 percent chance of showers. Low 13. Sunday: Cloudy with 30 percent chance of showers. High 18. Sunday night: Cloudy with 30 percent chance of showers. Low 11. Monday: A mix of sun and cloud. High 20.

  • Current Conditions
    Temperature
    18.4° C
    -1.4 ° C/hr
    Barometer
    101.45 kPa
    0.0
    Wind
    N/A 0.0 km/h
    gusting 0.0 km/h
    Humidity
    62 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    18.4° C
    Heat Index
    18.4° C
    Dewpoint
    11.0° C
    UV
    0.0
    Solar
    0 W/m2
    Last Updated: 0:10:00 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
    05:45
    Moon Phase
    Waxing gibbous (85% full)
    Civil Set
    20:56
    Day Length
    13:22:01
    Day High
    18.8° C @ 00:00 Tdy.
    Day Low
    18.4° C @ 00:09 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    101.45 kPa @ 00:00 Tdy.
    Day Low Barometer
    101.45 kPa @ 00:00 Tdy.
    Day Low Windchill
    18.4° C @ 00:09 Tdy.
    Day High Heat Index
    18.8° C @ 00:00 Tdy.
    Day High Wind Gust
    S 0.0km/h @ 00:05 Tdy.
    Day High Solar Radiation
    0W/m2 @ 00:00 Tdy.
    Day High UV Index
    0.0 @ 00:00 Tdy.

Buckle your seat belts we might be in for an eventful week.

All of the forecasts say we can expect spotty precipitation the first half of the week, followed by a strong pacific front Thursday, Friday and Saturday. Today and Tuesday there will be a chance for flurries or drizzle. Stay safe on the roads as there will likely be ice as the roads thaw and freeze and thaw and freeze.

Like last week, today and Tuesday will see most of the action concentrated on the North, Southeast and West coasts of the Island as you can see in the map here:

wa_pcp24.36.0000

The Alberni Valley should only see hints of this moisture until the winds shift to the South on Thursday.

All of the forecasts say we are now into an inversion situation (warm air aloft, cold air sticking to the ground, especially in Valleys like ours). That means all precipitation will be starting as rain in the warm air above and then potentially freezing as it comes down either as snow, or snow pellets or freezing rain.

All of the forecasts say the transition from our cold snap temperatures well below zero, to temperatures far enough above zero to make rain will be potentially messy.

Case in Point, the Canadian “GEM” model forecast for the week. Notice the temperatures stay below zero until Thursday when there is a triple threat of 30cm of snow, some freezing rain, followed by good old fashioned rain:

SpotX TempSpotx Precip

So if you are driving today, be aware of changing conditions on the roads especially on the passes.

And be aware that by Wednesday/Thursday things are going to get messy, here is the precipitation chart for 4AM Thursday to 4AM Friday. It shows 16mm of precipitation. That could be 16mm of rain, 15cm of snow, or most likely some mix of snow, freezing rain and rain.

Whatever happens, it looks like the party starts Thursday morning between 7 and 10AM.

wa_pcp3.90.0000