Saturday 12 October 2013

Impressive October Rainstorm

     An impressive Colorado Low brought unseasonable conditions to southern Manitoba yesterday. Trailing thunderstorms in parts of southwestern Manitoba brought some hefty rainfall totals. Heaviest amounts fell in a swath from the Wasagaming to Deloraine areas with general totals of 40-60 mm. The highest amount fell in the Deloraine area where 70.2 mm was recorded at the Manitoba Agriculture station.

     Here in Winnipeg, downpours around midnight last night brought some higher totals to the west and southwest ends. 13.2 mm fell in Charleswood since yesterday morning, while just 5.4 mm fell in south St Vital.

     Here's a map of rainfall totals across southern Manitoba yesterday and up to 8 am this morning:

Rainfall amounts courtesy of Manitoba Agriculture, Environment Canada and Cocorahs

     A thunderstorm was even recorded at Winnipeg airport. This only ties for 18th latest thunderstorm on record since 1953. The 1981-2010 normal last thunderstorm of the year is October 2.

14 comments:

  1. JJ, what happen to polls section of the blog?

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  2. Already 2.0 at my place as of 10:00 . Normally when its 2 at 10:00 we would be looking at allow of at least -1 or 2. Thankfully the south wind will save us tonight from low's of -1 and below. Not a guarantee though.

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  3. Well it looks like our run with nice well above normal temps since mid August is done. Models show large blocking pattern building over the gulf of Alaska which means a return to below normal temperatures. So it looks like the true 2013 will make a comeback after a brief hiatus. Long range forecasts for November don't look good for us and there is definately the possibility that winter will make an early arrival.....blah!!

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  4. JJ that was not me who posted, I have to work on getting a better account username so I won't be imitated..

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    1. Oops forgot to mention it was the SouthMBWeather account that someone imitated me.

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  5. This is an interesting long range prediction from the old farmers almanac. Click on my name for a more detailed version.

    Free 2-Month Weather Forecast

    OCTOBER 2013: temperature 7°C (1°C above avg.); precipitation 10mm (10mm below avg.); Oct 1-9: A few showers east, turning warm; rain and snow showers, cold west; Oct 10-15: Sunny, mild; Oct 16-24: Showers, then sunny, mild; Oct 25-31: Flurries, turning cold.
    NOVEMBER 2013: temperature Temp. -0.5°C (2.5°C above avg.); precipitation 15mm (5mm below avg.); Nov 1-6: Rain and snow showers; cold east, turning mild west; Nov 7-12: Snowy periods, cold; Nov 13-26: Sunny, mild; Nov 27-30: Snow showers, then sunny, cold.
    Annual Weather Summary: November 2013 to October 2014Winter temperatures will be colder than normal, on average, with the coldest periods in mid- to late December, much of January, and early to mid-February. Snowfall will be above normal, with precipitation slightly below normal in Alberta and above normal elsewhere. The heaviest snowfalls will occur in early to mid-January, mid- to late January, and mid- to late February.

    April and May will be warmer and slightly drier than normal.

    Summer will be slightly warmer and rainier than normal, on average, with the hottest periods in late July, early August, and mid-August.

    September and October will be warmer and drier than normal.

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  6. We certainly have made a full 180° degree turn to a much more below normal temperature regime.

    A clipper system may bring southern Manitoba's first accumulating snowfall of the season tomorrow evening into Sunday. The system will push into southwestern Manitoba tomorrow afternoon and evening, most likely as rain. However, rain will likely transition to snow in the evening, especially over higher elevations and generally north of the Trans Canada. 2-5 cm is possible for areas around Roblin, Russell, Riding Mountain and Virden.

    Some wrap-around behind the system may bring our first snowflakes of the season in the RRV and southeastern Manitoba Sunday night including Winnipeg. Not a major snowfall by any means, just a few wet flurries.

    Next week looks cold with highs only the low single digits.

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    1. EC has issued a special weather statement for southwestern Manitoba now for tomorrow night's snowfall. They too expect 2-5 cm, including the Dauphin, Minnedosa, Virden, Melita and Killarney regions.

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  7. Winnipeg could see its first snowflakes of the season tonight depending on how cold we get while precipitation is falling. So far it's falling as rain thankfully.

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  8. Thankfully no snow in the city overnight. Next chance is tonight.

    There was a decent lake-effect streamer of rain off Lake Manitoba last night. As a result, there were noticeably higher rainfall amounts in the Portage area. 13.2 mm has been recorded by a Cocorahs observer just northeast of Portage, whom just happened to be right under that streamer.

    2.3 mm here in south St Vital last night and 1.8 mm in Charleswood. Strangely the airport didn't report any accumulation.

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  9. Farmers Almanack was right, they said there would be a cool down about now ... and they where right.

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    1. I'd be impressed if their further in the future forecasts up to next year were correct, which is almost impossible to do..

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  10. Most of the precipitation stayed as rain overnight... until this morning. The first few snowflakes of the season have fallen in the city between 7 and 9 am this morning.

    Skies will actually be clearing this morning, but only to be replaced by more cloud later this afternoon, bringing another chance for flurries this evening and tonight.

    No end to this cold spell is in site unfortunately. In fact, we may be done with double digit temperatures for the rest of the year, unless if we get a warm up in November which is always possible.

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    1. 1 winner for the first snowfall poll with the answer being 'in the next few days (Oct 17-20)'

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