Sep-tober: Real deal cold front arrives

The season’s first significant cold front is sweeping across Minnesota. Shades of blue invade the northern U.S. this week.

Temperatures Monday afternoon show cold air diving south in the northern U.S. Data via Oklahoma Mesonet.

Back to the 50s

Temperatures in the 50s and 60s will be common the rest of this week across Minnesota. Overnight lows in the 30s and 40s will kick off the heating season in Minnesota this week.

NOAA via Weather Bell.

Frosty north

Frost will be common in north and central Minnesota the next several days. The Twin Cities inner core will likely escape frost this week but lows in the lower 40s will be common. Blue is taking over the weather maps in the Upper Midwest.

Projected low temperatures Wednesday morning via NOAA.

Frost is typical in northern Minnesota in late September. The average date for the first 32-degree temperature at MSP Airport is October 10.

Midwest Regional Climate Center.

Wet September

As predicted last week, parts of southern Minnesota picked up 3 to 6 inches of rainfall in the past week. Many farm fields in southern Minnesota are dealing with wet conditions.

So far this is the 7th wettest September on record. It’s also the wettest in 32 years.

Rivers running high

Runoff is keeping some rivers in flood this week. Here’s the Cottonwood River in New Ulm.