Cloud cover through midday helped keep temperatures in the Twin Cities slightly cooler than originally forecast on Sunday, but that won't be the case Monday as record temperatures will be shattered across southern Minnesota.
The hottest weather will be in place south of a line from Montevideo to the Twin Cities, the National Weather Service predicts, with highs ranging from 95-100 degrees and heat index values 100+ degrees from Mankato northeast to the metro area and east towards Eau Claire.
The actual air temperature is forecast to reach 99 degrees in much of the metro, which the NWS says is extremely rare, happening in May just twice in history – 106 degrees in May of 1994 and 99 in May of 1925.
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Meanwhile, east-central and southeast Minnesota are under an air quality alert from 12 p.m. to 8 p.m. Monday. The condition of the air will be unhealthy during those times, especially for people with asthma or other breathing conditions.
There are a number of cooling stations being made available across the Twin Cities.