Monday will be dangerously hot and humid across Minnesota with mostly sunny skies. Temperatures are expected to reach the mid to upper 90s; the Twin Cities metro area may reach 97°F. With dew points in the 70s, heat index values could range from 100°F to 110°F.
Most of Monday will remain dry, but thunderstorms may develop after sunset and continue overnight. Any storms could become severe, with hail and damaging winds as the primary threats. Monday night will remain warm and muggy, with lows only in the 70s.
Warnings and Advisories
An extreme heat warning is in effect from 9 a.m. Monday through midnight Tuesday for parts of central and southern Minnesota, extending into northwest and west-central Wisconsin. A heat advisory is also in effect for parts of western and north-central Minnesota, where heat index values may exceed 100°F.
Storm Potential
Dangerous heat and humidity may fuel storm development Monday evening as a cold front pushes into western Minnesota. If storms develop, they could become severe. A broken line of storms is expected to form as the cold front moves eastward.
Much of Minnesota is under a level 2 slight risk for severe weather Monday evening. Northwestern Minnesota faces a level 3 enhanced risk late Monday morning into early afternoon. Primary threats include damaging wind gusts (60-75+ mph) and hail (1-1.5 inches or larger). An isolated tornado and locally heavy downpours are also possible.
Storms are expected to move into the Twin Cities metro between 9 p.m. and midnight, with the greatest threat from 7 p.m. to 1 a.m. Most storms should move east of Minnesota shortly after midnight.
Extended Forecast
Tuesday will remain hot and humid, with highs in the low 90s and heat index values near 100°F. Another round of thunderstorms may develop late Tuesday afternoon and evening. The pattern is expected to remain hot and unsettled through much of the week, with highs in the 90s and periodic storm chances. Temperatures may ease into the 80s by the end of the holiday weekend.