Friday, November 21, 2014
Mild weekend ahead.. but turning snowy and colder Sunday night. Tricky Monday morning commute likely..
After 2 weeks of well below normal temperatures, southern MB will be getting a brief break this weekend with some milder temperatures as a couple of weather systems track across the central Prairies drawing milder air across the south. Southwest winds ahead of the first system today have pushed temperatures well above freezing over snow-free SW Manitoba with Brandon up to +7C this afternoon and +9C in Pierson. A brisk southerly wind over the snow covered Red River valley was keeping temperatures slightly colder in Winnipeg at -2C this afternoon. For Saturday, a weak ridge of high pressure will cross southern MB giving dry weather and light winds, with temperatures above freezing. By Sunday, a storm system will track across southern MB bringing snow through the Interlake and western MB parklands with 10-15 cm possible by Sunday night. As this system tracks east of the RRV later Sunday, winds will shift into the north and draw colder air into Winnipeg and the Red River valley with snow developing. Snow will continue Sunday night into early Monday along with gusty north winds producing local blowing and drifting snow. It's possible we may see 5-10 cm of snow by the Monday morning commute in Winnipeg although there is still considerable uncertainty on snowfall amounts at this point. Regardless, residents should plan for a slow commute to work or school Monday morning due to sharply colder temperatures, gusty north winds giving local blowing and drifting snow, and slippery road conditions.
Posted by rob at 3:18 PM
Friday, November 14, 2014
|MODIS satellite image of MB lakes|
Saturday Nov 8 2014
|MODIS satellite image of MB lakes|
Thursday Nov 13 2014
Well below freezing temperatures over the past week has brought the first snows of the season over much of southern MB as well as a rapid freeze up of the Manitoba lakes. The two "false colour" MODIS satellite images above were taken just five days apart between Nov 8th (left) and Nov 13th (right) The images show a much different landscape over southern MB over that time with more extensive snow cover (shown in light blue) and a rapid freeze up of the western MB lakes, with Lake Manitoba and Lake Winnipegosis now mainly ice covered. Lake Winnipeg still remains generally ice free except along the shores and some bays.. which is allowing lake effect cloud and flurries to persist as cold winds blow over the open water (open water seen as dark blue on satellite imagery with clouds seen in white) In fact, you can see the bands of heavier lake effect snow over the past day or two immediately south of Lake Winnipeg and Lake Manitoba, with less snow cover elsewhere over southern MB (bare land shows up as light brown)
With a continuation of well below freezing weather over the next 5 to 10 days, ice cover will continue to grow rapidly on the lakes, with Lake Winnipeg likely freezing up by the middle to end of next week. This will effectively shut off the lake effect machine for the season, and will also allow invasions of cold air to spread into southern Manitoba unmoderated by the lakes. Like it or not, winter is here folks!
Posted by rob at 10:08 PM
Tuesday, November 11, 2014
|Snowfall warning issued|
for areas south of MB lakes
Posted by rob at 3:32 PM
Thursday, November 06, 2014
|6-10 day CPC outlook for next week shows|
massive outbreak of below normal temps
over central and eastern NA
Posted by rob at 3:44 PM
Monday, October 20, 2014
Temperatures will be running well above normal this week over southern Manitoba as an upper ridge of high pressure builds over the eastern Prairies. Sunny skies and gusty south winds Tuesday will send temperatures into the mid to upper teens, with lows 20s likely across SW Manitoba. On Wednesday, clouds will increase ahead of a weak system crossing southern Manitoba that may trigger some scattered showers by afternoon or evening. Temperatures however will remain mild in the mid to upper teens. Sunshine will return for Thursday and Friday with temperature again in the mid to upper teens, some 10C above normal for late October. Slightly cooler conditions are expected early next week, although there are no indications at this point of a change to a prolonged below normal temperature pattern through the end of October.
Posted by rob at 9:17 PM