Your midday Minnesota weather update Multiple flood warnings are in effect across Minnesota this Saturday, with the most serious concerns along our river valleys where spring snowmelt and recent rains have pushed water levels dangerously high. We're starting the day cool at 47 degrees, but temperatures will climb quickly through the morning, reaching 71 by noon. That warming will fuel thunderstorm development, with rain chances jumping from 20 percent this morning to over 80 percent by 5 P.M.