Wed. Aug 22nd, 2018

Glimmer of snowpack hope? But return to cool mornings/warm afternoons

  • 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
    21.6° C
    -1.8 ° C/hr
    Barometer
    101.44 kPa
    0.0
    Wind
    N/A 0.0 km/h
    gusting 0.0 km/h
    Humidity
    49 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    21.6° C
    Heat Index
    21.6° C
    Dewpoint
    10.4° C
    UV
    0.0
    Solar
    0 W/m2
    Last Updated: 22:25:00 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
    05:44
    Moon Phase
    Waxing gibbous (85% full)
    Civil Set
    20:59
    Day Length
    13:22:16
    Day High
    33.3° C @ 16:03 Tdy.
    Day Low
    11.6° C @ 06:16 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    101.91 kPa @ 08:29 Tdy.
    Day Low Barometer
    101.39 kPa @ 17:44 Tdy.
    Day Low Windchill
    11.6° C @ 06:16 Tdy.
    Day High Heat Index
    33.3° C @ 16:03 Tdy.
    Day High Wind Gust
    S 13.2km/h @ 17:00 Tdy.
    Day High Solar Radiation
    705W/m2 @ 14:18 Tdy.
    Day High UV Index
    2.7 @ 13:01 Tdy.

The good news is the rain yesterday fell as snow up in the mountains.  Even though it hasn’t shown up on the graph just yet, just maybe, this is a start on a bit of a snowpack.

From the River Forecast Centre.  Data is a little noisy to start... third and second to last values are the important Snow Water Equivalent  and Snow Depth measurements.  Times are in UTC.
From the River Forecast Centre. Data is a little noisy to start… third and second to last values are the important Snow Water Equivalent and Snow Depth measurements. Times are in UTC.

The hourly data shows the 28cm of snow fell on Jump Creek over the evening and last night. (near Nanaimo Lakes)

The value they track is Snow Water Equivalent rather than snow depth.  So the graph below should update later today to show just the tiniest lift in the dark blue line as the hourly data is reporting 20mm of snow water, but it hasn’t updated yet.spd3b23p-3

 

Don’t get too excited though.  Average snow water equipvalent for this time of year is closer to 1000mm.  So Thursday’s small system delivered only 2% of that average. But lets hope it is the start of a trend.

Breezy today – Pattern of foggy/cool mornings warm/sunny afternoons returning?

There is some breeziness happening right now on the East and West Coasts of the Island as the last remnants of the front pass through but this should end fairly soon.

The models are a little uncertain, but the general consensus seems to be that we will be back to a pattern of foggy and cold mornings, possibly going below zero, with the fog breaking by noon and sunny and warm afternoons getting into the 10ºC-15ºC range.

Here is Friday and Saturday from the Canadian high resolution short term model.  We might dip below freezing tonight as the clouds clear but it should be warm again tomorrow and it doesn’t actually predict any fog.  We’ll see.Screen Shot 2015-02-27 at 9.15.45 AM

 

 

This agrees well with the temperature forecast from the UWash model for Saturday afternoon which has us up to 15ºC.

 

 

wa_tsfc.12.0000

 

It also agrees with the multi-model analysis showing mild temperatures through the weekend though the lows start to drop below freezing by Monday or Tuesday.Screen Shot 2015-02-27 at 9.16.08 AM

 

 

Light showers on Sunday evening.

There is a risk of some light showers on Sunday evening.  Perhaps a little more snow for the snowpack station.  Don’t expect any of it to fall as snow anywhere other than the Mountain ranges.  But again, it won’t be very much.

wa_pcp3.63.0000Looking long range into March, the brief cold spell gives way to very mild temperatures even though the outliers do have some colder temperatures.

Screen Shot 2015-02-27 at 9.22.27 AM

Have a great weekend everyone!