A developing low pressure system over southern Saskatchewan will tap an increasingly moist and unstable airmass over the Dakotas to trigger scattered thunderstorms over North Dakota today. Some of the storms over the Dakotas are expected to become severe later today into this evening with much of the northern Plains in a slight to moderate risk of severe thunderstorms. As the low pressure system advances east, showers and thunderstorms will spread over southern MB tonight.. with the potential for locally heavy rain (20-30 mm).. intense lightning.. and hail, especially over southwestern MB. This activity will push through Winnipeg and the Red River Valley Friday with drier conditions moving in by evening as a dry slot pushes in. Cooler unsettled weather will return for Saturday in behind the low with brisk northwest winds and a few showers over southern MB. Highs will likely struggle to reach 20 degrees Saturday. Sunny and warmer weather is expected for Sunday Monday and Tuesday with highs likely approaching the 30 degree mark by the July 1st holiday.