Residents of the Gogebic Range never experienced a colder temperature so late in the season on June 24, 1979. It fell to 29 degrees, as a chilly Canadian high-pressure system settled almost right over the Upper Peninsula (Image 1 above). More records were set at Iron Mountain (36) and the National Weather Service (NWS) near Negaunee (33).
June 1979 was a wet one. Over six inches of rain was recorded at the NWS. The month ended nearly a degree below average.
Through the 23rd, the mean temperature at the NWS is very close to normal at 0.3 degrees above average. Rainfall, on the other hand, is well above average. Last night a slow-moving band of heavy showers moved through and dropped 1.67 inches in a short period of time. Then this morning, an area of heavy rain with imbedded thunder rolled through adding to the monthly total. As of this evening, the total for the month is 5.51 inches. The long-term average for the entire month is about three-and-a-quarter inches.
Other locations had heavy rain the last 24 hours. Watton in Baraga County collected 1.65 inches while a NWS observer near Mineral Hills in Iron County reported 2.25 inches in just a few hours.
Scattered showers may persist over parts of Upper Michigan (especially in the south) into Wednesday. We should have a break in the wet weather Thursday and probably Friday, too. Then over the weekend a new low approach from the west. Warm and humid air will be drawn into Upper Michigan and there is a good chance of several clusters of showers and thunderstorms over the weekend into next week.