Rain and Thunderstorms on the way with significant rainfall for most

Rain and embedded thunderstorms expected to move in within the next few hours, current KTIV radar image at 12:59am Tuesday

Showers and embedded thunderstorms are possible overnight into Tuesday morning with 30 to 75mm expected, locally higher amounts are possible. Image from KTIV Interactive Futurecast.

Tonight an area of low pressure will swing in from the south bringing a large area of rainfall into the province, thunderstorms have already developed and persisted in southern and central north dakota for the past few hours. This area of rainfall and embedded thunderstorms will evolve and develop northwards overnight into tomorrow morning covering all of southern Manitoba. Rainfall amounts could be as much as 10 to 30mm in the Red River Valley and 70mm in the southwest. For those who are affected by thunderstorms mostly in the overnight and morning hours you could pick up higher amounts. 

A thunderstorm threat exists Tuesda afternoon and evening

As we get into the morning hours the rain and thunderstorms will clear out of the Red  River Valley, leaving behind a dry slot where the sun should come out. With daytime heating there should be increased chances for showers and non severe thunderstorms to develop especially in the evening hours along the cold front. However in the southwest rain is expected to continue to fall under the stubborn occluded front where 70mm is expected by the end of the day. A rainfall warning is in place for the southwestern portion of the province read here... http://weather.gc.ca/warnings/report_e.html?mb5 Temperatures should be near 20C in Winnipeg and in the mid to high teens for most of the province. Cooler and rainer conditions are expected Tuesday night into Wednesday

Long Range:
Warmer weather is expected to arrive by midweek with a increased chance of more showers and storms for the end of the week as another couple of low pressure systems move into the area. As we are entering June on Wednesday I expect the real heat and humidity to start pumping in a week or two and severe weather may start becoming a common occurrence here in a very short while. You know being in Manitoba things can change quite quickly.