57 F. high in the Twin Cities Thursday. That's the average high on October 19.
74 F. average high on September 11.
86 F. high on September 11, 2013.
September 11 in Minnesota Weather History. Source: MPX National Weather Service:
1982: Two tornadoes touched down in Benton County. The F2 tornado caused $250,000 worth of damaged and the F0 caused $25,000.
1931: The fifth consecutive day of 90 degrees or above in the Minneapolis area.
1923: Snow pays an early visit to northern Minnesota. Some cities that saw flurries and sleet were Roseau and Virginia.
1903: 4.96 inches of rain fell in the Minneapolis area.
1869: A hail storm between 1 and 3 am broke windows and caused considerable damage to late vegetables at Madilia in Watonwan County.
No, the growing season isn't over. Not yet. Odds are plants and flowers within 25 miles of Minneapolis and St. Paul will not freeze their buds off early Saturday.
Thank the urban heat island for that. Concrete and asphalt absorbs heat during the day and slowly radiates it into space at night, acting as a thermal blanket.
Frost during the second week of September is a bit unusual, but not unprecedented. The mercury at MSP International sank to a crisp 32F on September 3, 1974. The locals were not amused.
It may be hard to imagine out there today, with building clouds and showers over southern Minnesota keeping temperatures in the low 50s, more than 20F cooler than average, but you should be able to work up a minor sweat within a week. Long-range guidance shows a warming trend next week; 80F not out of the question next Friday and Saturday.
You'll need a jacket or sweatshirt for Friday football games; the best chance of a cold rain south of the Minnesota River.
Our internal models show the best chance of frost over southeastern Minnesota early Saturday, but highs rebound to near 60F tomorrow; mid-60s Sunday. At the risk of playing therapist - a milder spell is imminent.
Image credit above: "A NASA image of the ozone layer over the past 35 years. From 2000 to 2013, ozone levels climbed 4 percent in the key mid-northern latitudes at about 30 miles up."
File photo credit above: National Geographic.
“To ease another's heartache is to forget one's own.” – Abraham Lincoln
Climate Change Accelerating Death of Western Forests. Warmer, drier overall, creating an environment where pests, especially pine beetles, can weaken trees, making them more prone to drought and fire. Here's a clip from USA TODAY: "...Colorado alone could lose 45% of its aspen stands over the next 45 years, says the report released Thursday by the Union of Concerned Scientists and the Rocky Mountain Climate Organization. Pine bark beetles alone have killed 46 million acres of trees across the west, an area nearly the size of Colorado. "The wildfires, infestations and heat and drought stress are the symptoms; climate change is the underlying disease," Jason Funk, the report's co-author and a senior climate scientist at Union of Concerned Scientists, said in a statement..."
Image credit above: "