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That Canadian low will strengthen as it cruises southeastward into western Ontario by tomorrow morning. Temperature Switches to Cooler Than Average Middle to Late Work Week (Frost Threat Mainly in Northern Minnesota) I have a 1 in 3 chance for rain this afternoon into early this evening. Because the clouds associated with the front will get here by midday or early afternoon, I am keeping highs around 80 degrees, but with uncomfortable humidity. There will be a lot of low-level moisture available, but the lack of mid-level moisture means that any thunderstorms are likely to develop very late this afternoon or this evening, and that would push the best chance for storms into Wisconsin, including a chance for large hail. That front will arrive near sunset tonight. This afternoon, however, the low pressure system spinning from Saskatchewan to Manitoba overnight (see counterclockwise swirl on the Mid-Tropospheric water vapor loop from Colorado State satellite slider) will pull the cold front near the US-Canadian border (see latest NWS WPC North American zoom-in map) into Minnesota. Without yesterday's fog, we are beginning the day with a good supply of sunshine (see Shortwave Albedo loop from Colorado State satellite slider), so temperatures will climb rapidly to the upper 70's to near 80.
![weatherradar mn weatherradar mn](https://s3.amazonaws.com/content.interactivehailmaps.com/radar-images/radar-image-81440.png)
And Continuing Through Midday Today (Chance of Few Late Day Showers?) The moisture is still relatively limited, but showers and thunderstorms broke out in east central Minnesota, mainly from the Twin Cities northward, that have moved on into Wisconsin (set frames to 48 on the College of DuPage north central US radar loop). It is much more humid near the front over Iowa with dew points in the 60's and even a few oppressive lower 70's. Even warmer air from the western Dakotas and Montana has been flowing in on southeast winds overnight (see NWS Aviation Weather Center METAR map click on Minnesota). The dew points allowed for a morning low in the upper 40's, but crept up into the noticeable middle to upper 50's yesterday afternoon ( see NWS: 3-day of St. Warmer air began to move back into Minnesota yesterday as highs topped out around 80 degrees in much of central Minnesota (see 4 PM Monday NWS WPC North American zoom-in map). Getting Warmer Yesterday with Some Late Night Storms in Eastern MN
![weatherradar mn weatherradar mn](https://bringmethenews.com/.image/t_share/MTY2MzExNzAzNjE1NjQ1MzI2/9672381030_14f25f0d72_k.jpg)
You can see this contrast in yesterday's high temperatures, with more 100-plus temperatures in Kansas than in the Desert Southwest, but highs only in the 60's and even 50's in central Alberta, Saskatchewan, and Manitoba (see 4 PM Monday NWS WPC North American zoom-in map). While we have spent most of this month in the middle so far, there are going to be some wild swings through the rest of this week. Cloud September high-low temperature chart) and the record low temperatures are below freezing (bottom of light blue). Cloud record high temperatures are still in the lower 90's (top of light red on the NWS Twin Cities St. The next three days are going to live up to the reputation that Minnesota fall (and spring) temperatures can do just about anything. Tuesday, Septem4 :30 AM Bob Weisman Meteorology Professor Saint Cloud State University Atmospheric and Hydrologic Sciences Department September Weather About to Do Anything
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