Friday 25 July 2014

Unsettled Saturday; Then Calming Down

     Lots of debris cloud today across southern Manitoba ahead of a troughline in south-central Manitoba this morning. The trough is expected to push through the RRV this afternoon before continuing east to the Ontario border. A thunderstorm or shower cannot be ruled out with this, but widespread activity doesn't look very probable. Looking more isolated in nature.

     Skies will clear this afternoon behind the troughline, allowing temperatures to warm up a bit. We should reach 25-26°C in the late afternoon or early evening.

     Tomorrow looks unsettled as a low pressure system and cold front moves through southern Manitoba. After a fairly sunny start in Winnipeg, clouds will increase midday and a few showers are likely in the afternoon and evening. With a bit of instability available, a few rumbles of thunder cannot be ruled out. However, severe activity is not expected at this time.

     High pressure moves in on Sunday, clearing things out. It will be much cooler with highs of only around 21-22°C.

     Temperatures are expected to gradually warm up during the work week. Highs in the high 20's may be possible by mid-week. It will also be dry with no major threats of rain expected through the work week.

     Average mean temperature at the airport so far this July is 18.5°C. With only normal to slightly below normal conditions into next week, it is very likely that July will finish colder than normal. 1981-2010 normal is 19.6°C. The 1984-2013 average is 19.5°C and as a result, July will likely be the 10th consecutive month below the previous 30-year normal. This is truly remarkable because this would be the longest below normal streak since the infamously cold 1880's.

7 comments:

  1. Storm threat for Winnipeg has passed. Now we have to see how much rain we manage to get tomorrow to see how July finishes in terms of rainfall.

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    1. Note that dewpoints will tank later this afternoon as a dryline passes through. Dewpoints down to 9C in Portage but still close to 20C in Winnipeg.

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  2. Unsettled conditions still expected today with scattered showers, some heavy, and possibly thunderstorms this afternoon and evening. This will be our last good chance for rain in a while so this is our last chance to ensure this July doesn't make it into the top 10 or top 15 driest Julys on record.

    Cooler tomorrow with a mix of sun and cloud reaching around 22°C. A bit warmer on Monday, reaching around 24-25°C. A bit warmer again on Tuesday, reaching 26-27°C. Slow warming trend continues until late week.

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  3. JJ, Knowing how inaccurate, EC's 3-7 day forecasts are, do you think that those 33Cºs at the end of next week are possible, or is EC just teasing us as per usual?
    Thanks, Anon

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    1. Will have a quick forecast update this evening. Just got back from an internet-free weekend :)

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  4. I'm surprised you recorded 6 thunderstorm days so far this month sure doesn't seem like that many. Whatever storms we did get seemed to be over as fast as they started. With that this marks our 4th july in a row with a lack of thunderstorms in Winnipeg (I don't recall july last year being a stellar month for storms here). Sometimes I wonder if the greater awareness in storm monitoring and rise in popularity in storm chasing and the fact that pretty much everyone has a camera and is taking photos and videos of storms all over the place that get broadcasted to the media that would normally go unnoticed is making it seem like we're missing out constantly compared to all of these other places when in fact this how it normally is. Seems like the perspective nowadays is different then it use to be. With that being said though we have been below normal in storm activity these last few years so it seems to have combined with everything I said above about greater awareness/coverage to almost make it a double edged sword which is seeing more what we're missing out on. Really hope this isn't the new reality with the media and broadcast storm chasers showing us what we're missing out on but this is how it normally will be from now on.

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    1. Actually, the airport has had 6 thunderstorm days this month as well. Thing is, the storms we have gotten this month just weren't very impressive for July. We'd typically expect bigger storms at this time of year, but that just hasn't happened this year, or the past few years as you mention. Looks like July will finish off with about 25.4 mm of rain at the airport assuming we don't get any unexpected rains before Friday. This would be the 14th driest July on record since 1873 as a result.

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