Fri. Feb 22nd, 2019

Valley Cloud today

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

    Forecast Issued 4:00 PM PST Thursday 21 February 2019 - Thursday night: Cloudy. Periods of snow beginning late this evening. Amount 2 to 4 cm. Wind up to 15 km/h. Low minus 1. Wind chill minus 3 in the evening. Friday: Periods of snow ending near noon then cloudy with 40 percent chance of rain showers. Snowfall amount 2 to 4 cm. High 6. UV index 1 or low. Friday night: Cloudy. Flurries beginning late in the evening. Amount 2 cm. Wind up to 15 km/h. Low minus 2. Wind chill near minus 4. Saturday: Flurries or rain showers. High plus 4. Saturday night: Clear. Low minus 4. Sunday: Sunny. High plus 5. Sunday night: Clear. Low minus 5. Monday: Sunny. High 7. Monday night: Clear. Low minus 5. Tuesday: Sunny. High 6. Tuesday night: Clear. Low minus 5. Wednesday: A mix of sun and cloud. High plus 5.

  • Current Conditions
    Temperature
    3.9° C
    0.2 ° C/hr
    Barometer
    101.63 kPa
    0.0
    Wind
    S 4.8 km/h
    gusting 12.9 km/h
    Humidity
    71 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    3.9° C
    Heat Index
    3.9° C
    Dewpoint
    -0.8° C
    UV
    0.0
    Solar
    0 W/m2
    Last Updated: 0:30:00 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
    06:42
    Moon Phase
    Waning gibbous (89% full)
    Civil Set
    18:24
    Day Length
    12:32:40
    Day High
    3.9° C @ 00:28 Tdy.
    Day Low
    3.6° C @ 00:04 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    101.64 kPa @ 00:13 Tdy.
    Day Low Barometer
    101.63 kPa @ 00:00 Tdy.
    Day Low Windchill
    0.8° C @ 00:26 Tdy.
    Day High Heat Index
    3.9° C @ 00:28 Tdy.
    Day High Wind Gust
    S 6.4km/h @ 00:20 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.