A cold front over western Manitoba late this afternoon is triggering a line of thunderstorms mainly northwest of the Red River valley through the western Interlake areas late today, with some potentially severe storms developing. (see 5:50 pm radar image left) A severe thunderstorm watch has been posted for much of southern Manitoba including Winnipeg and the Red River valley for the potential for severe thunderstorms into this evening as the cold front approaches. It looks like the bulk of storms will pass to the north of Winnipeg through the Interlake region, but the potential is there for isolated storms to develop further south. This front will usher in a cooler airmass for the next few days with highs only in the low 20s through the weekend. Warmer weather is expected to return to southern MB early next week.