Frosty mornings are coming

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1:06
Cold and breezy start Friday with lake effect snow showers
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1:49
Preventing gun thefts after SBPD releases new data
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0:16
Knox High School on lockdown after sounds of gunfire
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0:42
Rep. Jim Banks endorsed by Fmr. President Trump for Senate bid
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New mural anticipated on popular stairway in St. Joe
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0:53
Veteran center receives $10,000 donation from SB airport Thursday
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South Bend’s Meet the Mayor on Feb. 7 at Riley High School
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low response to survey, asking for feedback at in-person meetings
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Michigan State University: free courses in Adulting 101
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Frigid Friday with some snow on the way
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0:46
Potawatomi Poppy’s 2023 Groundhog Day prediction
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2:25
Kroc Center looking for seniors to participate in free Healthy...
As we start the month of October, naturally, our temperatures will start to fall. That means mornings will be getting colder and colder, and we've already had a few chilly mornings over this past weekend. Frost will slowly start to creep into Michiana as we move through October, with the southern portions of the area usually seeing their first frost of the season within the first 10 days of the month. But, you might be wondering, how does frost develop?
During calm and clear nights, the heat that the ground absorbs from the Sun during the day leaves the surface and escapes into the atmosphere. At the same time, cooler air slowly sinks down to the surface. As temperatures continue to fall towards 32 degrees, that air close to the ground condenses on the grass, crops, and plants, and can freeze to form frost.
And, interestingly, frost can form even when lows stay above freezing. That coldest pocket of air right next to the ground can be up to 10 degrees colder than the surrounding environment, so freezing at the surface is possible even if the current temperature if only 36 degrees!
