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Summer returns Tuesday; a month's worth of rain this week?

Heavy rain potential returns Wednesday and Thursday

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Meteorological summer — June to August — is over. But summer weather is not done with Minnesota yet.

A warmer and more humid air mass pushes into Minnesota this week. A series of low pressure waves will trigger scattered rain and thunderstorms. Many locations around Minnesota could pick up a month’s worth of rain this week.

Rainfall potential this week
Rainfall potential this week
Twin Cities National Weather Service

We’re in between rain systems Tuesday. Highs in southern Minnesota south of the warm front spike into the 70s and 80s Tuesday afternoon. Highs remain a little cooler in northern Minnesota.

Forecast Highs Tuesday
Forecast Highs Tuesday
Courtesy of National Oceanic and Atmospheric Administration

‘Aug-tember’

The weather maps look more August than September into next week. The upper air forecast charts continue to depict the jet stream on a Canadian vacation next week. That favors a warm, and mostly dry ridge of high pressure across most of the U.S. next week.

NOAA upper air forecast map for 7 pm Thursday September 19
NOAA upper air map for 7 p.m. Thursday, Sept. 19
Courtesy of National Oceanic and Atmospheric Administration

The European model suggests temperatures around 10 degrees warmer than average this weekend and early next week. That would put highs (well) into the 80s.

MSP Doppler down

The Twin Cities National Weather Service Doppler radar is down for an upgrade for the next week or so. The new pedestal upgrade should keep the radar going into the 2030s.