Tuesday, July 24, 2007

Another sultry night.. relief coming Wednesday

We got to 34.8C at Winnipeg airport today, just 0.2C off the record high for today with humidex values peaking at43C. And after today's steamy weather, there won't be much relief tonight. It will be another very warm night across southern MB, especially here in Winnipeg and the Red River valley where gusty southerly winds will persist tonight, keeping temperatures from dropping much. As a result, temperatures will remain above 30 well into the evening, gradually dropping to an overnight low of only 26C. That would be Winnipeg's second warmest low temperature on record, behind only July 12 1936 when a low of 28.3C was recorded. That will mean a very uncomfortable night for sleeping for those without A/C.

Relief however is on the way on Wednesday. A heat-wave ending cold front will be coming through by midday or early afternoon. So after another warm and muggy morning with temperatures peaking at 32C by midday, winds will shift into the northwest in the afternoon sending temperatures and humidex values down. By evening, temperatures will likely be down to the 25C mark, and 20c by midnight with lows of 16C by morning. In addition, the cold front will likely be accompanied by showers and thunderstorms that could bring locally heavy rainfall and possibly some severe winds or hail. Look for more comfortable conditions and seasonably warm temperatures for Thursday into the weekend.


  1. Yes, there is a chance of some tough storms tomorrow evening, and then the dynamics die out quickly. Nice by Friday. Warmer over the weekend, but nothing outrageous, and no 20+ nights. Maybe a bit toasty early next week, but not like what we're having now.

  2. Amazing heat over southern SK and northern Montana today..

    42.1C at Coronach, SK
    41.8C at Weyburn, SK
    111F (44C) at Wolf Point, MT
    110F (43C) at Miles City and Sidney, MT

    Those temperatures were accompanied by low dewpoints (< 10c), which goes to show you that you really need that dry air to get those really high temperatures.

  3. Yes...it would take a pretty dry air mass to hit or crack 40. That warm, dry air didn't make it far enough east to give us that kind of heat. It wouldn't have felt any worse than what we did get. The last time Winnipeg saw 40 was on August 7, 1949, when it hit 40.6