April 1, 2020

Valley Cloud today

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

    Forecast Issued 4:00 PM PDT Tuesday 31 March 2020 - Tuesday night: Mainly cloudy. 70 percent chance of showers changing to 30 percent chance of showers this evening except wet flurries over higher terrain this evening and after midnight. Risk of thunderstorms early this evening. Low plus 1. Wednesday: Mainly cloudy. 30 percent chance of showers in the afternoon. High 10. UV index 3 or moderate. Wednesday night: Mainly cloudy. Low plus 1. Thursday: Cloudy. High 7. Thursday night: Cloudy periods with 30 percent chance of rain showers or flurries. Low minus 1. Friday: A mix of sun and cloud with 30 percent chance of flurries or rain showers. High 8. Friday night: Cloudy periods. Low zero. Saturday: Cloudy. High 10. Saturday night: Cloudy with 60 percent chance of showers. Low plus 3. Sunday: Cloudy with 60 percent chance of showers. High 11. Sunday night: Cloudy periods. Low plus 3. Monday: A mix of sun and cloud. High 12.

  • Current Conditions
    Temperature
    3.3° C
    0.1 ° C/hr
    Barometer
    101.66 kPa
    0.0
    Wind
    N/A 0 km/h
    gusting 0 km/h
    Humidity
    95 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    3.3° C
    Heat Index
    3.3° C
    Dewpoint
    2.6° C
    UV
    0.0
    Solar
    0 W/m2
    Last Updated: 1:25:00 PST
    Click to Refresh or See All Conditions
  • Today's Almanac
    Rain since Midnight
    0.0 mm
    Continuous Rainfall (< 24hr gap)
    45.0 mm since
    March 28, 2020 00:03
    Civil Rise
    06:21
    Moon Phase
    First quarter (49% full)
    Civil Set
    20:24
    Day Length
    13:22:51
    Day High
    3.3° C @ 01:13 Tdy.
    Day Low
    3.2° C @ 00:38 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    101.66 kPa @ 00:58 Tdy.
    Day Low Barometer
    101.62 kPa @ 00:00 Tdy.
    Day Low Windchill
    3.2° C @ 00:38 Tdy.
    Day High Heat Index
    3.3° C @ 01:13 Tdy.
    Day High Wind Gust
    S 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. 🙂

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.