Sat. Oct 20th, 2018

Valley Cloud today

  • Vancouver Island Inland Sections Forecast - FOG ADVISORY , Port Alberni
    Issued: 07:33 AM PDT Saturday 20 October 2018

    Forecast Issued 05:00 AM PDT Saturday 20 October 2018 - Saturday: Fog dissipating late this morning then mainly cloudy. Clearing this afternoon. High 16. UV index 2 or low. Saturday night: Increasing cloudiness this evening. Fog developing late this evening. Low plus 4. Sunday: Fog dissipating late in the morning then mainly cloudy. Clearing in the afternoon. High 16. UV index 2 or low. Sunday night: Fog. Low plus 3. Monday: Fog. High 15. Monday night: Cloudy. Low plus 4. Tuesday: Rain. High 15. Tuesday night: Rain. Low 8. Wednesday: Periods of rain. High 14. Wednesday night: Rain. Low 9. Thursday: Rain. High 12. Thursday night: Rain. Low 7. Friday: Cloudy with 60 percent chance of showers. High 12.

  • Current Conditions
    Temperature
    9.4° C
    0.2 ° C/hr
    Barometer
    102.45 kPa
    0.0
    Wind
    N/A 0.0 km/h
    gusting 0.0 km/h
    Humidity
    95 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    9.4° C
    Heat Index
    9.4° C
    Dewpoint
    8.6° C
    UV
    0.0
    Solar
    7 W/m2
    Last Updated: 8:10:00 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
    07:14
    Moon Phase
    Waxing gibbous (84% full)
    Civil Set
    18:52
    Day Length
    13:03:57
    Day High
    9.4° C @ 07:51 Tdy.
    Day Low
    7.3° C @ 00:00 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    102.56 kPa @ 02:14 Tdy.
    Day Low Barometer
    102.45 kPa @ 07:59 Tdy.
    Day Low Windchill
    7.3° C @ 00:00 Tdy.
    Day High Heat Index
    9.4° C @ 07:51 Tdy.
    Day High Wind Gust
    S 1.7km/h @ 01:00 Tdy.
    Day High Solar Radiation
    9W/m2 @ 08:09 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.