Fri. Sep 21st, 2018

Two more hot days. Fires in North. Floods in South. Why is this happening?

  • Vancouver Island Inland Sections Forecast - SPECIAL WEATHER STATEMENT IN EFFECT
    Issued: 3:44 PM PDT Friday 21 September 2018

    Forecast Issued 4:00 PM PDT Friday 21 September 2018 - Friday night: Periods of rain. Risk of thunderstorms this evening. Amount 10 to 20 mm. Low 12. Saturday: Showers. Amount 5 to 10 mm. High 15. UV index 2 or low. Saturday night: Cloudy with 60 percent chance of showers. Low 10. Sunday: A mix of sun and cloud. High 18. Sunday night: Clear. Low 6. Monday: Sunny. High 19. Monday night: Clear. Low 6. Tuesday: Sunny. High 23. Tuesday night: Clear. Low 8. Wednesday: Sunny. High 21. Wednesday night: Clear. Low 8. Thursday: Sunny. High 21.

  • Current Conditions
    Temperature
    14.8° C
    -0.8 ° C/hr
    Barometer
    100.78 kPa
    0.0
    Wind
    W 0.0 km/h
    gusting 1.6 km/h
    Humidity
    96 %
    Rain Rate
    7.1 mm/hr
    Wind Chill
    14.8° C
    Heat Index
    14.8° C
    Dewpoint
    14.1° C
    UV
    0.0
    Solar
    2 W/m2
    Last Updated: 16:30:00 PDT
    Click to Refresh or See All Conditions
  • Day Almanac
    Day's Rain
    19.8 mm
    Day ET
    0.0 mm mm
    Rain Storm
    NotAvailable mm
    Civil Rise
    06:31
    Moon Phase
    Waxing gibbous (91% full)
    Civil Set
    19:51
    Day Length
    13:12:10
    Day High
    16.9° C @ 10:50 Tdy.
    Day Low
    11.6° C @ 06:51 Tdy.
    Day High Rain Rate
    19.6mm/hr @ 16:10 Tdy.
    Day High Barometer
    101.5 kPa @ 00:13 Tdy.
    Day Low Barometer
    100.78 kPa @ 16:28 Tdy.
    Day Low Windchill
    11.6° C @ 06:51 Tdy.
    Day High Heat Index
    16.9° C @ 10:50 Tdy.
    Day High Wind Gust
    S 22.7km/h @ 12:30 Tdy.
    Day High Solar Radiation
    601W/m2 @ 10:13 Tdy.
    Day High UV Index
    2.7 @ 11:49 Tdy.

There were literally dozens of records set yesterday in BC.  Too many to list.

Once again our micro climates in the Valley made for a little more complicated picture but as we all know, and is born out in all the historical data the city and Inlet is generally hotter than the Valley areas. While the islandweather.ca stations in Port Alberni are not official for Environment Canada, the reality of the situation is that all of the city stations were above the record set by the old city of Port Alberni station of 28.3 in 1934.  The lowest temperature from yesterday in thr city was  28.4°C  at the Maquinna Elementary station.  The highest was 28.9°C at Alberni Elementary and the Neptune station.

The Airport got up to 27.9°C, smashing last years high (20) for the station but also easily bettering than the Beaver Creek record for the day which was only 26.7°C in 1915.

So as far as I am concerned Port Alberni had its hottest April 18 ever yesterday.

Here is the afternoon high for today and Wednesday.

image image

The top image shows Tuesday will “only” get to about the same as yesterday.  The 26°C (80F) range, possibly a degree more.  This should just miss the all time record.

Wednesday there is disagreement between UWash and EC.  As you can see in the bottom picture, UWash says we will go even higher into the 29-31°C range!  This would challenge the record of 30° in 1934.

Fires in the North

What I find most disturbing about this weeks heat is less the heat here, and more the heat in the north of BC.  Fort St. John and Dawson Creek got into the 28-30°C range yesterday absolutely obliterating extreme highs of 20°C and they did it with 60-70kph winds which whipped up no less than 30 wildfires.

That kind of activity in mid-April is stunning.

Floods in the South, Why?

Meanwhile, half a continent away, Houston is under water.

So why is this all happening, it boils down to the jetstream.

image

You can see the blue above of the jetstream flowing to the north parts of BC pumping in that hot air to Fort St. John and leaving a big open air to the south for hot air to fill in.

You should see the two swirls or eddies further south, one off California and one over the rockies.  These will trap moisture and they will stay stationary, bringing torrential rain to wherever they affect most, in this case Houston.   This is very much the same pattern  that flooded Calgary in July of 2012.

We have seen huge temperature increases and a record low icepack in the Arctic this winter. Have those conditions created the possibility or increased the chances of this extreme weather?  Personally, I think it is obvious. I am sure there will be teams of meteorologists and climatologists going over the data once again to find out just how strong the finger prints of climate change are on this weeks extreme weather.