Valley Cloud today

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

    Forecast Issued 05:00 AM PDT Wednesday 25 April 2018 - Wednesday: Sunny. High 24. UV index 5 or moderate. Wednesday night: Clear. Low plus 5. Thursday: Sunny. High 26. Thursday night: Clear. Low 7. Friday: Sunny. High 27. Friday night: Clear. Low 8. Saturday: Cloudy with 30 percent chance of showers. High 17. Saturday night: Cloudy with 30 percent chance of showers. Low 7. Sunday: Cloudy with 30 percent chance of showers. High 20. Sunday night: Cloudy periods. Low 6. Monday: A mix of sun and cloud. High 16. Monday night: Clear. Low 6. Tuesday: Sunny. High 18.

  • Current Conditions
    Temperature
    4.9° C
    -0.7 ° C/hr
    Barometer
    102.02 kPa
    0.0
    Wind
    N/A 0.0 km/h
    gusting 0.0 km/h
    Humidity
    89 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    4.9° C
    Heat Index
    4.9° C
    Dewpoint
    3.3° C
    UV
    0.0
    Solar
    0 W/m2
    Last Updated: 5:10:00 PST
    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
    05:32
    Moon Phase
    Waxing gibbous (78% full)
    Civil Set
    21:03
    Day Length
    13:17:07
    Day High
    10.6° C @ 00:00 Tdy.
    Day Low
    4.9° C @ 05:07 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    102.02 kPa @ 03:58 Tdy.
    Day Low Barometer
    101.93 kPa @ 00:00 Tdy.
    Day Low Windchill
    4.9° C @ 05:07 Tdy.
    Day High Heat Index
    10.6° 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.

The forecast today has a term I’ve never seen used:

Valley cloud. Fog patches dissipating this afternoon. High plus 5 except plus 1 areas of low cloud

In other words, the fog may lift but won’t clear completely everywhere and so it will stay cold in those areas. Great day for a trip over to the East Coast!
Update: I’ve modified the Freezing Level calculation a bit so that it only calculates it if the Cloud Base is above 900m(3000ft). Below that usually means it’s foggy and/or inversion effect and the calculation is no good anyway. Hopefully that doesn’t completely wipe out it’s usefulness, as we all know how often we have fog or Valley Cloud during the winter. πŸ™‚

Update: I’ve just installed the “hardened” temp/humid sensor that I received from Davis. It’ll take it a little while to acclimatize completely but it seems to be operating fine, hopefully this is the last time I have to go up on the roof this winter.

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