Exceptional December Warmth Continues

The warm weather bathing over southern Manitoba shows no end in sight as daytime highs above freezing will remain in place for the next week, absolutely rocketing past the seasonal high temperatures near -8°C.

The coming days will be dominated by a broad zonal flow over the southern Prairies that will maintain the unseasonal warmth over the region and continue to keep the Arctic air bottled up north. Mainly sunny skies over the coming days will help produce daytime highs near 3 or 4°C, some 10°C above normal for this time of year.  While we likely won’t be hitting record high temperatures—which range from +5-12°C for the coming days—this period of warmth is nonetheless remarkable for early December.

For the coming days, temperatures will remain at least 8°C above normal for this time of year.  The prolonged period of warmth will result in a gradual erosion of the snowpack over the majority of the Red River Valley.

MODIS (Aqua) True Colour Satellite for December 3, 2015
MODIS (Aqua) True Colour Satellite for December 3, 2015

With little-to-no snow in the forecast, there’s a decent chance that by the start of next week, there’s a lot more bare ground showing around the Winnipeg area.

Other than the warm temperatures, there’s little to talk about in the forecast.  Today will be a fairly windy day with southerlies increasing through the day to around 40-50 km/h this afternoon. Winds will subside tonight and remain relatively light through the weekend. Overnight lows will sit in the -2 to -4°C range.

Long-Range Outlook

Nothing but warmth.

Both the NAEFS and the CPC show very high probabilities of above-normal temperatures continuing through the coming week or two. Little-to-no precipitation is expected.

Enjoy the beautiful weather!

Beautiful Start to December Continues

Beautiful Start to December Continues

A foggy start today will be the minor blip in what looks to be a beautiful second half of the week, and start to meteorological winter, as the mild weather shows no end in sight.

The forecast for the remainder of the work week is pretty straightforward: beautiful with warm and sunny weather.

This morning will be the one blip over the next few days as fog over the region gradually burns off. After that, we’ll see mainly sunny conditions over the coming days with temperatures slowly warming as a train of low pressure systems tracking across the Northern Prairies drag warmer air eastwards across the Prairies.

Winds will be calm today, however pick up through the remainder of the week. Thursday will see westerly winds around 20–30 km/h while Friday will see gusty southerlies at 30–40 km/h.

By Friday, daytime highs will be 10°C or more above seasonal values with the potential for substantial snow-melt through much of the Red River Valley.

Weekend Outlook & Beyond

The mild weather will continue into the weekend with daytime highs slightly above 0°C expected throughout much of the Red River Valley. Saturday will likely be the nicest day of the week with daytime highs of 2–4°C and some breezy westerlies. Sunday will be a bit cooler with lighter winds.

NAEFS 8-14 Day Temperature Anomaly Forecast valid December 10 to 17th, 2015
NAEFS 8-14 Day Temperature Anomaly Forecast valid December 10 to 17th, 2015

Looking further ahead, the NAEFS continues to remain very confident in above normal temperatures for the region. With no indication that the Polar Jet has any plans to shift further south, out of the Northern Prairies, it seems fairly safe to go with the NAEFS forecast. Early indications are that we can expect daytime highs next week in the range of –2°C to +2°C or so with little in the way of precipitation.

Near-Record Heat for Thanksgiving Weekend

The heat is on for Thanksgiving weekend in Southern Manitoba as a low pressure system tracking across the northern Prairies and draws unseasonably warm air eastwards into the province. Temperatures will soar into the 20’s on the weekend—some 10–15°C above normal for this time of year—with possible record-breaking heat in place for Sunday.

Today will be a fairly cloudy day despite our sunny start, thanks to a large area of cloud spreading eastwards along the leading edge of the warm air. As the cloud moves in, winds will increase out of the south-southeast to 30–40km/h with a bit of gustiness on top. Today’s daytime high will be near 15°C throughout much of the Red River Valley. The cloud cover will thin this evening into the overnight as temperatures dips to the high single digits.

GDPS 850mb Temperature Forecast valid Sunday October 11, 2015 at 18Z.
Shown by this forecast of 850mb temperatures, a large area of warm air will be in place over southern Manitoba on Sunday.

Saturday will be a gorgeous day with partly cloudy skies, southwest winds at 20–30km/h and a high temperature around 23°C in the Red River Valley.[1] Temperatures will dip to around the 10°C mark on Saturday night with clear skies.

Sunday will bring mixed skies as a cold front approaches from the northwest. Temperatures will soar into the mid–20’s, giving a run at the record high of 26.1°C set in 1942. It looks like Winnipeg’s temperature will likely end up just short of the record, but it’s something to keep an eye on!

Record Temperatures for Thanksgiving Weekend 2015 in Winnipeg, MB
Date Record Temperature Record Year
October 9 27.8°C 1938
October 10 27.8°C 1934
October 11 26.1°C 1942

A cold front will slump through the Red River Valley on Sunday evening, ushering in breezy northwesterly winds up to 40–50km/h and a cooler airmass. The low temperature will settle around 10°C on Sunday night. There will be a chance for some rain on Sunday night into Monday depending on exactly where the wrap-around precipitation of the low passing to our north ends up, but at this point there’s too much uncertainty to make any confident forecast at this point.

Thanksgiving Monday & Beyond

Thanksgiving Monday looks less pleasant than the weekend; there will be plenty of cloud around alongside a chance for rain as a strong low pressure system moves into northern Ontario. Winds will be fairly strong, likely around 40km/h or so. The daytime high will only be in the 10–15°C range, so it will certainly feel significantly cooler than the weekend.

After Monday, things look fairly seasonal with temperatures potentially slightly above normal. No particularly big weather systems appear to be on the horizon, although a slight northwest flow is forecast to develop mid-week, which could increase our chances of some shower activity. All in all, though, a fairly quiet week expected.

Happy Thanksgiving! Enjoy your weekend!


  1. Daytime highs might climb a degree or two higher near the western escarpment of the Red River Valley where southwesterly downslope winds may add a bit of warmth.  ↩

Wednesday Rain Lead Transition to Warmer Weather

A low pressure system moving across Southern Manitoba today will produce some rain this afternoon that may have a slight risk of an isolated thunderstorm in the heavier bands. This system is on the leading edge of a large-scale pattern shift that will transition the region into a warmer, but windier, regime for the end of the week and extending through Thanksgiving weekend.

Today will be a bit of an unpleasant day; moderately strong southeasterly winds will develop through the morning to around 40 km/h (with some gusts on top of that) by this afternoon while temperatures struggle from a chilly sub-zero low to just the low-to-mid teens. The strengthening winds will be courtesy an approaching low pressure system that will push across the Red River Valley later today; this system will be responsible for some widespread shower activity late this morning into the afternoon hours that will push from west to east across southern Manitoba.

RDPS 12hr. Precipitation Totals valid Thursday Night
The RDPS is showing 5-10mm of rain through the RRV with this system, however pockets of 10-15mm appear possible.

Winds will diminish as the low passes by in the evening. Expect mainly cloudy skies overnight with a low near 6 or 7°C.

Seasonal Temperatures Lead to Weekend “Heat Wave”

Thursday and Friday will both be fairly similar days thanks to a ridge of high pressure dominating the region. Winds will be relatively light, skies fairly sunny[1], and temperatures fairly seasonal with daytime highs near 13°C and overnight lows near in the –1 to 4°C range.

The winds will begin to pick up out of the southwest on Friday evening as the ridge of high pressure moves off to the east and a more zonal flow pattern begins to develop for the weekend.

This zonal flow pattern will result in much warmer air pushing eastwards across the Prairies, sending temperatures soaring 5–8°C above normal for this time of year. At this point, it looks like daytime highs will be around 20–22°C this weekend with winds in the 20–30km/h range.

No precipitation is expected on Saturday or Sunday, however a cold front pushing through Sunday afternoon may bring in some breezy winds. For Thanksgiving Monday, pleasant conditions with highs in the mid-to-upper teens are expected. Winds will likely be breezy out of the west to northwest, though, at around 30km/h.

NAEFS 8-14 Day Temperature Anomaly Outlook
The NAEFS continues to forecast above-normal temperatures for Western North America in the 8-14 day range.

Further down the road in the 8–14 day range, the NAEFS continues to forecast above normal temperatures for western North America. There isn’t a whole lot to say about it, so just enjoy the (relatively) pleasant weather outside. If a frosty morning here or there has you down, just remember that it’s October and we’re looking at 20°C+ highs for Thanksgiving weekend!


  1. Except for Thursday morning, where any remnant cloud from today’s system will be clearing out.  ↩