Sep 14, 2011 at 10:33 pm
ST. CLOUD, Minn. (KNSI) - With temperatures set to plunge during the overnight hours, a freeze warning has been issued for St. Cloud and the rest of central Minnesota as well as much of the southern portion of the state early Thursday morning, according to the National Weather Service.
The warning runs from midnight through 8 a.m. Thursday.
A strong Canadian high pressure system moving over the St. Cloud region tonight was expected to bring a combination of light winds, a clear sky and well below normal temperatures for mid-September, the NWS reported.
St. Cloud State meteorologist Bob Weisman said a frost is nearly guaranteed and a freeze, accompanied by low temperatures in the upper 20s, were a good possibility.
"We could see temperatures of 28 or colder...that's the killing frost. That means the end of the growing season, crops stop growing," Weisman said.
The freeze warning is issued primarily during the growing season. The National Weather Service recommended growers take precautions against the conditions and cover crops and other sensitive vegatation as best they can before Thursday morning. Homeowners were also encouraged to cover or bring in any sensitive outdoor plants.
"This is going to leave us a relatively short growing season, relatively speaking, about 20 days ler than normal," Weisman said.
Weisman said according to St. Cloud weather figures compiled between 1981 and 2010, the first freeze in St. Cloud has normally come on October 5. If temperatures should reach freezing Thursday morning, it would make the 2011 growing season of 133 days the shortest such season in St. Cloud since 2007, Weisman said.
Temp: 68°F (20°C)
Wind: Calm N