Chillier and chillier weather will gradually work its way into the weather forecast for the Twin Cities, with temperatures dropping far enough tonight to create the threat of patchy frost in some areas tonight.
Our first frost date, on average, is in the October 1-10 range… so it’s not too shocking. That doesn’t make it any easier for folks still not wanting to move past summer.
Luckily, if you don’t see frost tonight (and many of us will miss it), we’ll be warming up again for a few days after this. That’ll give your tomatoes a few more days to ripen… or if you don’t have a garden it’ll just be a few more days that you won’t need to wear gloves.
Here’s the weather situation tonight to tomorrow, depicted using temperatures about a mile up in the atmosphere:
Those blues over Minneapolis/St. Paul indicate temperatures around 28-30 degrees a mile up. While we won’t get that cold, if/when winds totally calm tonight that’ll be when temps drop quickly. That’d be when mostly outlying areas, generally in the suburbs, could see patchy frost.
Keep that in mind tonight – but even if you’re in the city if you want a guarantee against frost damage it’d be wise to cover your plants tonight.
Follow Meteorologist Aaron Shaffer on Twitter. Aaron is a meteorologist who lives in Minneapolis, is on the Midtown Greenway Coalition's board of directors, and is the digital communications and social media associate for the nonprofit Avivo in Minneapolis. Deep down he's a weather geek and has a degree in Atmospheric & Oceanic Sciences from UW-Madison to prove it. He's spent time working at TV stations in Wyoming, South Dakota, and Iowa prior to arriving in Minneapolis to work for WeatherNation and now forecasting for MinnyApple. His favorite weather career moment came while storm chasing for his Iowa station (he went on 40+ storm chases during that time), when he saw a mile-wide EF-4 rated tornado.