Sunday, October 06, 2013

Finally some moisture for Montreal - incredible South Dakota snow

Streets in Rapid City, South Dakota clogged with snow. (CNN)
Rain finally moved into Montreal this afternoon, 14 days after the last measurable precipitation. Around 7mm fell on L'Ile Perrot, it has since ended with the showers moving off to the northeast as a warm front crossed the region. Temperatures will rise to 23C by midday Monday, well above the normal October 7 high of 14C. The afternoon will feature a strong cold front trailing from the same system the brought South Dakota its massive snowstorm Friday. This front will produce heavy rain and thunderstorms in southern Quebec, along with winds gusting to 70km/h in the afternoon. Rainfall along the front could be significant with up to 40mm possible in some locations. Temperatures will cool to 7C Monday night behind the front. Tuesday will be windy and cooler with highs near 15C.
Several tornadoes including this one in Nebraska, occurred on the warm side of the storm.
Friday's snowstorm across the plains of South Dakota and Wyoming was legendary with several snow rerecords being smashed. The Black Hills received as much as 50 inches of heavy wet snow accompanied by 70 mph winds. The storm was big by any standards but especially for October. Drifts piled up the sides of many buildings while trees and power lines were down across the region. Highways were jammed with stranded motorists, several had to be rescued by snowmobile. The snow was accompanied by thunder and lightning in Rapid City and Lead. Meanwhile on the warm side of the system, strong thunderstorms and tornadoes raced across Nebraska with an F-4 tornado reported in Wayne. Damage was extensive across the region. Flooding is now a concern in South Dakota as the record snowfall begins to melt.

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