A Return To Seasonal Weather

After a surprisingly cold day yesterday, we’ll be quickly returning to seasonal temperatures over the next couple days with little weather to worry about.

12hr. QPF valid Thursday at 18Z

12 hour precipitation accumulation from the RDPS model valid near lunch time on Thursday. The RDPS is forecasting roughly 1–3cm of snow over Western Manitoba as a cold trough lingers over the area.
Wednesday

Increasing cloud.
-17°C / -20°C

Some cloud will push in today as another disturbance begins to push into the region but our highs will still remain below normal, sitting at about –17°C for most of the Red River Valley. Winds will remain fairly light out of the south through the day. Temperatures will drop only a few degrees tonight to about –20°C thanks to lingering cloud cover.

Thursday

Thursday

Becoming cloudy.
-10°C / -15°C

We’ll see a return to normal temperatures Thursday as warmer air continues to work it’s way into Manitoba. Highs will sit near –10°C under a mix of sun and clouds. The cloud will be from a system to our west which is not expected to impact the Red River Valley but will bring some light snow to southwestern Manitoba. Skies will remain fairly cloudy overnight as we drop to –15°C.

Friday

Friday

Mix of sun and cloud.
-9°C / -13°C

Friday will once again bring a mix of sun and cloud. Almost a carbon copy of the day before, our daytime high should get up to around –9°C. Temperatures will drop to only about –13°C on Friday night as we head into a pleasant weekend with seasonal temperatures of around –8°C expected and little chance of snow.

Enjoy the return to seasonal temperatures and get out there and enjoy Festival du Voyageur or go for a skate down on the river! If you didn’t see it yesterday, be sure to check out our special post yesterday summarizing the Louis Riel Day blizzard.

Special: Louis Riel Day 2013 Blizzard

Louis Riel Day was marked this year by a significant blizzard that brought much of the Red River Valley to a standstill. While snowfall was relatively light, with only 5–10cm reported in most localities (although a few pockets of 10–15cm did exist through the Southern portion of the Red River Valley), strong northerly winds that gusted as high as 70–80km/h produced blowing snow that gave whiteout conditions through most of the Valley.

Warm Front on Sunday, February 17

This system was marked by a warm frontal passage on Sunday near noon. Strong southerly winds brought local blowing snow to the region as an area of precipitation blossomed along the warm front. Here in Winnipeg, the precipitation fell as ice pellets first before switching to snow. Further south, a little deeper into the warm air, moderate band of freezing rain developed, coating Steinbach, as well as Highway 1 East, Highway 52 and Highway 59 in a layer of ice.

Freezing Rain in Steinbach 1

Freezing rain accumulating in Steinbach. Credit: @andrewpenner78

After this band went through, then winds slowly died off and we were able to enjoy a relatively nice afternoon. Near Steinbach, however, there were reports of numerous cars in the ditch due to “skating-rink”-like road conditions.

Cold Front and Blizzard, Sunday/Monday February 17/18

The cold front associated with this system passed through Winnipeg between 6–7PM CST; winds switched from southerly to calm to northerly and cloud ceilings rapidly dropped to 300–400 feet and a few hours of freezing drizzle happened in the low-level mixing immediately behind the cold front. By 10:30, winds began to pick up and the freezing drizzle switched over to snow. By midnight, visibilities had dropped to ½SM and would stay there or worse until roughly noon on Monday. To our south, conditions remained practically a white-out for an additional 6–7 hours, with visibilities not lifting above ¾SM until 7PM CST as sustained winds of 50–60km/h battered the area.

24 Hour Rainfall Accumulations

24 Hour Precipitation Accumulations

In total, around 3–6cm fell in Winnipeg, with areas on the south side of the city receiving nearly twice that of the central/northern portion. South of Winnipeg, snowfall amounts were appropriately higher:

  • Winnipeg: 3–6cm
  • Morden: 8cm
  • Morris: 10cm
  • Pinawa: 8cm
  • Steinbach: 11–13cm

As winds abated, colder air began working into the region. The temperatures have been on a downward trend all the way from Monday morning to the time of publishing this; temperatures are beginning to level off at –27°C.

Impacts

Twitter was a great source of information for what was happening during this event; between weather reports flooding in on the MBstorm hashtag and immediate communication about road conditions, it was relatively easy to get a grip on the significance of this system.

Some pictures came in early on Sunday as the band of freezing rain pushed through Steinbach:

Freezing Rain in Steinbach 2

Freezing rain accumulation on a car in Steinbach. Credit: @andrewpenner78

As the winds picked up, blowing snow quickly became the predominant impact over the Red River Valley:

Snow Drifts in Niverville

Snow drifts rapidly growing in Niverville. Credit: @jim_311

Some truly impressive images came out of Winnipeg Beach on Monday morning:

Snow Drifts in Winnipeg Beach

Massive snow drifts in Winnipeg Beach. Credit: @annhogie

Massive Snow Drifts in Winnipeg Beach

Massive snow drifts in Winnipeg Beach. Credit: @annhogie

Massive Snow Drifts in Winnipeg Beach

Massive snow drifts in Winnipeg Beach. Credit: @annhogie

Conditions on highways were fairly brutal on Monday:

Blowing snow on Highway 311

Blowing snow on MB Highway 311. Credit: @jim_311

Blowing snow Near Emerson, MB

Blowing snow in Emerson, MB.

Even within cities in the southern Red River Valley, conditions got quite bad:

Blowing snow in Winkler, MB on Monday morning.

Blowing snow in Winkler, MB on Monday morning.

Many highways were closed for this event:

  • Highway 16 from Hwy. 50 to Hwy. 466
  • Highway 1 West from Portage to Winnipeg
  • Highway 75 from Winnipeg to the US Border; I–29 from the US Border to Grand Forks, ND
  • Highway 5 from Neepawa up to St. Rose.

Numerous traffic accidents occurred as well, keeping the RCMP quite busy:

  • A 10-car pileup occurred in St. Francois Xavier that involved several semi-trucks. No injuries.
  • 3 semi-trailer trucks collided on Highway 1 west of PR 332.
  • Two semis smashed through road barricades in Headingly. A police cruiser was damaged by debris but nobody was hurt.

Perhaps most tragically, one man died in this storm. A 54-year old man was found dead near Landmark. He had left his car after driving into the ditch on road 45N. The road was slippery and visibility was near-zero at the time.

This was a very significant blizzard that had huge impacts on the Red River Valley. Fortunately, residents had plenty of time to prepare as Environment Canada issued special weather statements on Friday morning addressing the potential for a significant blizzard and carried them through to the issuing of warnings.

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p>If you have any pictures you’d like to share, leave them in the comments below or send them to aweathermoment at shaw dot ca.

Blizzard to Start the Week

Heavy blowing snow will greet residents of the Red River Valley on Monday morning. Calmer, but colder weather is in store after the storm passes.

NAM model predicted weather on Monday morning

Monday

Monday

Blowing snow
-18°C / -28°C

A strong low pressure system has generated heavy blowing snow and blizzard conditions in parts of the Red River Valley on Monday morning. Wind speeds early Monday are in the 40-50km/h gusting to 60-70km/h range across Southern Manitoba. This in combination with a fresh 5-15cm of snow in the region is the obvious cause of the very poor weather conditions. The wind will gradually taper off through the day on Monday, allowing the blizzard to subside as well. However, blowing snow at some level will last through basically the whole day in open country.

Tuesday

Tuesday

Mainly sunny
-22°C / -31°C

Tuesday will be a very cold day, in fact the coldest in quite awhile. Lows on Tuesday morning will be in the upper minus twenties, with highs in the low minus twenties. Wind chill values will be elevated as well, making for a rather unpleasant day.

Wednesday

Wednesday

Mainly sunny
-15°C / -20°C

Wednesday morning will be another cold one, with lows around minus thirty. Daytime highs will moderate somewhat, reaching into the minus teens. However, wind chill values will become an issue again on Wednesday afternoon, probably not what you were hoping to hear.

Long Range

There is no sign of spring in the long range forecast at the moment, but I do know that each passing day is in fact one day closer to spring, whether it feels that way or not.

Elsewhere in Weather News: February 16th, 2013

Tornado Hits Hattiesburg, MS

The Deep South in the United States experienced another round of severe weather this past Sunday as gulf flow brought moisture and other crucial ingredients –such as vertical wind shear and forcing– to the area, creating ideal conditions for the spawning if tornadic supercells.

The tornado that occurred late Sunday afternoon and travelled through Hattiesburg Mississippi (population 51,000) was the strongest tornado of the outbreak (total of 14 tornadoes) and caused the most damage. Rated as a low-end EF-4, the Hattiesburg Tornado made its way through the north-west side of the city. It tore off roofs, took down brick walls, and caused damage to the south end of the University Southern Mississippi campus. Two dozen injuries were reported and no fatalities occurred with this tornado, thanks in part to quick warnings issued by the NWS citing that there was a confirmed tornado heading towards the city.

Video of the Hattiesburg, MS tornado as it passed through the north-west part of town. (Source: Youtube – tarah106)

With these additional 14 tornadoes, the United States is running slightly above their tornado average of 73, with a current count of 103 tornadoes. All 103 tornadoes occurred in the Southern and Midwest US. What remains to be seen is how the peak tornado season will play out in April/May in Tornado Alley where they are currently experiencing significant drought. The lack of moisture in that area could impact the season’s typical storm activity.

NOAA graph

US (inflation adjusted) tornado percentile ranks, created by NOAA – SPC. (Source: NOAA)

Elsewhere, there has not been much extreme weather other than more hot temperatures for Australia and a weakening tropical cyclone Indian Ocean (Gino) which managed to reach category two earlier this week.