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About Toronto4

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  • Four Letter Airport Code For Weather Obs (Such as KDCA)
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  • Location:
    Toronto, Ontario

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  1. April 12th-15th Winter Storm

    It’s been a wild weather ride the last few days in the Toronto area. TTC streetcar operations are being affected as ice on the overhead wires is causing slow operations and even some service adjustments. And the ride gets even more interesting tomorrow if the 00z NAM is correct. It shows Toronto getting around 6” of wet snow. The 18z GFS has a couple of inches by Tuesday morning.
  2. April 12th-15th Winter Storm

    The HRRR also keeps us more into the freezing rain, which is concerning. It shows close to 0.5” of precip as FRZRA.
  3. April 12th-15th Winter Storm

    Not sure but we are on the southern edge of the heavy snow tomorrow according the 18z GFS. It gives us 8” of snow.
  4. April 12th-15th Winter Storm

    According to the Euro maps from the weather.us site, today's 12z run shows around 0.2 to 0.4" (5 to 10 mm) of precip falls in the form of snow tomorrow. It'll be interesting to see if the heavy precip rates can overcome the warm layer for a brief period to allow snow to fall in the GTA.
  5. April 12th-15th Winter Storm

    If the frontal boundary sinks further south than currently modelled, then we could even see some snow mix in with the ice pellets. The 06z HRDPS shows some precip falling as pure snow tomorrow, though the majority of it falls as IP. I don't think the lake will be a factor tomorrow afternoon as we'll have low level cold air coming from the NE and temperatures falling during the day. It'll probably be more of a factor on Sunday afternoon when the WAA pushes through and changes the precip from sleet/freezing rain to heavy rain. In any event, this is an unusual and fascinating setup for this time of the year.
  6. April 12th-15th Winter Storm

    Environment Canada is forecasting 5 cm (2”) of ice pellets tomorrow. If that pans out, it’ll be added to the seasonal snowfall total at YYZ.
  7. April 12th-15th Winter Storm

    Some of 12z Euro ensemble members are colder than the op run and bring significant snowfall/sleet to the Greater Toronto Area on Saturday afternoon/evening. They are faster in sagging the backdoor cold front on Saturday morning. The 12z WRF run from today hints at this.
  8. April 12th-15th Winter Storm

    Any sleet that falls this weekend will add to the seasonal snowfall total at YYZ. Sleet is considered as a form of frozen precipitation (snow).
  9. The March Lion Storm

    Snow beginning to pick up in intensity in downtown Toronto and starting to stick on grassy surfaces.
  10. The March Lion Storm

    Latest HRRR and 00z NAM (3 km and 12 km) is suggesting hourly snowfall rates of close to an inch for a couple of hours in the GTA, starting around 11pm or midnight.
  11. The March Lion Storm

    I'm going to go with a wide range for the GTA. Trace to 1" for eastern parts of the GTA (Pickering, Ajax, Whitby, Oshawa) Around 1" for east Scarborough, Markham 1 to 2" for west Scarborough, eastern portions of North York Around 2" for East York and eastern portions of the old city of Toronto Around 3" for downtown Toronto 3 to 4" for western parts of Toronto 4" + for Mississauga and points southwest
  12. The March Lion Storm

    The 12z Euro ensemble members are all over the place. The mean/control run is similar to the operational run, but man, there are some divergent members, ranging from a monster with over 1" QPF to a complete whiff.
  13. The March Lion Storm

    This is crazy. So much divergence. Hopefully tonight's 00z runs will narrow these differences somewhat.
  14. The March Lion Storm

    According to the link below (8th member of the Euro ensemble run), there are some amped up 12Z Euro ensemble members with over 1" QPF for the GTA. And also some whiffs and some in-between. https://weather.us/model-charts/euro/7cde42424525268bfe98328ed2d8f162/m8_acc-total-precipitation/20180303-0600z.html
  15. February 8th-11th Overrunning Event

    Agreed. Latest HRRR is indicating the snow will continue until the evening hours (sometime between 7-10 pm).