Strong thunderstorms have started to develop this evening in south-central Manitoba. These storms are likely to expand in coverage later this evening and shift eastward. The Red River Valley and southeast will also be at risk of severe storms this evening and overnight. #mbstorm

The cold front has made its way through Winnipeg, dropping the temperature from 34 C at 6pm to 27 C at 8pm. The humidex dropped from 45 at 6pm to 30 at 8pm. #mbwx

A cold front is advancing across southern Manitoba today. However, it's a pretty lazy front and isn't moving very fast. For most of southern MB it will be another hot/humid day. Even for areas behind the front, the cooler/drier air is slow to arrive.

Elm Creek, Manitoba with an astounding 29 C dewpoint this evening. As recorded by the Manitoba agriculture network.

Another 24 hours of extreme heat and humidity is on tap for southern Manitoba before a cold front arrives later tomorrow. It will sweep away the worse of the heat/humidity. Tuesday will still be fairly warm, with highs in the mid-upper twenties, but much lower humidity.

It’s currently 35 C with a dewpoint of 27 C at my house just outside Winnipeg. That gives a perfect 50 for the humidex. Highest I’ve ever recorded with my weather station. #mbwx

Three days of oppressive heat are on the way for southern Manitoba: Saturday: Highs 31-34 C; Humidex 40-45. Sunday: Highs 33-37 C; Humidex 41-47. Monday: Highs 32-35 C; Humidex 40-46. A cold front will push across southern Manitoba on Monday, putting an end to the heat.

A non-exhaustive list of June rainfall totals in Manitoba: San Clara: 422 mm Stonewall: 409 mm Petersfield: 303 mm Roblin: 275 mm Swan River: 269 mm Winnipeg (The Forks): 232 mm Dauphin: 211 mm Pinawa: 211 mm Brandon: 169 mm Winnipeg Airport: 154 mm #mbstorm

All of southern Manitoba should be prepared for heavy rain later today. An extremely humid air mass will result in widespread thunderstorm activity starting this evening, with the potential for flash flooding. #mbstorm

The Prairies will get no break from rain as yet another powerful system is set to arrive this weekend. The 5-day average of all weather models (below) has many large areas of 50-100 mm. However, do not be surprised to see pockets that receive 100-200 mm.

City of #Winnipeg rainfall totals from June 9 & 10 #mbstorm

Note preliminary: It appears Manitoba has set a new 24-hr provincial rain record with the storms on Tuesday night. I've confirmed a high-quality gauge measurement of 292 mm (11.48 in) approx. 2 km west of Stonewall. #mbstorm

If anyone north of Winnipeg (including Stonewall) has rain gauge measurements I would really appreciate you sharing them (including location when possible). This was potentially a record event for Manitoba, so I'd like to document it as much as possible. #mbstorm

More thunderstorms are beginning to develop this afternoon in the Red River Valley and southeast. Severe storms are possible again - not expecting a repeat of yesterday, but hail, damaging winds, and heavy rain are possible again. #mbstorm

For all the flack the RRFS has been catching, it was the only model to consistently show supercells affecting the RRV yesterday. Indeed, many runs specifically showed a supercell right over Winnipeg. It has certainly performed no worse than any other CAMs over the past 3-4 days.

If anybody saw hail today I would greatly appreciate any reports. Specifically the location, time, and size.

Stonewall, MB has received 208 mm (~8 in) of rain today including 190 mm in the past 4 hours. Beware of flash flooding potential in the area! #mbstorm

Please also be alert to flash flooding potential tonight. Many areas have received torrential rain. Road washouts are possible and water is often deeper than it appears! Just north of Winnipeg (e.g. Stonewall) has already received 150 mm+ (6 in +) and counting. #mbstorm

Storms have exited Winnipeg for now, but more are on the way. A strong line of storms is presently located from Portage la Prairie southward to just west of Morden. This line will impact the Red River Valley over the next few hours. #mbstorm

An incredibly strong push of moisture is about to enter southern Manitoba from ND/MN. As this moisture arrives the potential for severe weather will begin. (See dewpoints in green of 20-23 C just south of the border). #mbstorm

Widespread severe weather, including the risk of tornadoes, is expected today in southeastern Saskatchewan and southern Manitoba. Storms may also produce torrential rain, very large hail, and destructive winds. #mbstorm #skstorm

Today is the most dangerous severe weather setup I have seen in southern Manitoba in a long time. Storms could produce tornadoes, destructive winds, and very large hail. If thunderstorms approach, take shelter immediately. #mbstorm

Severe weather will redevelop again today across eastern Saskatchewan and southern Manitoba. Dangerous storms are possible, with a risk of large hail, damaging winds, heavy rain, and tornadoes. Here is our severe weather outlook. #mbstorm #skstorm

There is a risk of severe thunderstorms tomorrow in eastern Saskatchewan and western Manitoba. These storms could produce large hail, damaging winds, heavy rain, and tornadoes. The risk of severe weather is expected to continue on Sunday in southern Manitoba. #mbstorm #skstorm

Weather models are hinting at the "classic" eastern Prairies severe weather pattern this weekend. A strong upper trough will move across western Canada with a surface low lifting out of Montana. I'm keeping a close eye on how this plays out! #mbstorm #skstorm

Thunderstorms are expected to begin redeveloping this afternoon in southern Manitoba. Some storms could be severe once again, but the tornado threat is lower than yesterday. Here are predicted storm locations at 5 pm from the @weatherlogics.bsky.social convection-allowing model.

The risk of severe weather will continue across southern Manitoba tomorrow. Storms are less likely to produce tornadoes, but hail, strong winds, and heavy rain will remain threats. #mbstorm

A dangerous storm with tornado potential is located over the Riding Mountains between Wasagaming and McCreary as of 2:40 pm CDT. #mbstorm

Dangerous thunderstorms have developed in western Manitoba. Take shelter if they approach! #mbstorm

Severe thunderstorms are possible today in eastern SK and southern MB, developing this afternoon and continuing into the evening. The strongest storms could produce tornadoes as shown by the white hatched area. #mbstorm #skstorm