Meteorologist Sven Sundgaard reports a sultry, unstable weather pattern setting up over Minnesota just in time for Independence Day, with a potential for isolated storms followed by a more organized round of showers and thunderstorms by Friday night into Saturday.
Increasing heat and humidity across Minnesota
As of today, Wednesday, July 3, dew points are beginning to climb, pushing the air mass into oppressive territory. By Friday, expect highs near 90°F (32°C), but with the heat index likely reaching the mid 90s°F (35–37°C) across much of southern and central Minnesota. This is due to rising moisture levels and a building ridge of high pressure over the Upper Midwest.
Storms develop late Friday into Saturday
While Thursday evening may bring a few isolated showers or storms, the primary storm threat is expected to develop late Friday into Friday night. A slow-moving cool front, in combination with an upper-level system, could trigger scattered thunderstorms, especially over central and southern Minnesota.
The severe weather risk remains low for now, mainly due to a lack of vertical wind shear, but heavy rainfall, lightning, and gusty winds could still occur with any stronger storm cells.
Relief arrives Sunday and Monday
By Sunday, behind the departing system, cooler and much drier air will filter in from the northwest, bringing a refreshing change to Minnesota. Highs will drop back into the upper 70s°F to low 80s°F (25–28°C) with dew points retreating into the comfortable 50s°F (10–15°C) range.
Stay tuned for updated forecasts, especially heading into Friday evening, as storm details will become clearer closer to the event.
