Thursday, November 14, 2019
Despite a cold front passing early Thursday morning, temperatures aloft were actually warming. The warm and dry air helped trap
moisture near the surface, under what is known as an 'inversion'. During the warmer months, when the sun angle is stronger, an inversion is quick to dissipate because the higher sun angle allows the atmosphere to warm faster, helping mix the atmosphere. As we get further and further into the cooler months the sun angle isn't as strong, so temperatures are not able to warm as quickly - or efficiently. Sometimes moisture becomes trapped under that warm layer, leading to either fog or cloud cover sticking around longer during the day. This can have a major impact on temperatures during the afternoon.
The entire month of November so far has been below average. In fact, Rockford from November 1st to the 13th has logged an average temperature of 29.8°. That currently stands as the second coldest start to the month of November on record, second to 1991 (27.0°). We will continue the cooler than average trend today, but we’ll make a run at 32° this afternoon.
The weather expected for tonight is going to provide the perfect opportunity for temperatures to "bottom out" or rapidly fall. With mostly clear skies, calm winds, and all that snow covering the surface, temperatures are set to drop into the teens by Friday morning. A bit of patchy fog is also possible before the sun rises. We’ll see another day of sunshine tomorrow, with highs climbing into the upper 30s. It feels like it's been forever since we have seen temperatures above the freezing mark. Dry conditions look to stick around through the first half of the weekend. More cloud cover is expected to move in late Saturday ahead of our next system. A mix of rain and snow is possible late Saturday night before gradually transitioning to all liquid rainfall by Sunday. Until then, enjoy the sunshine and warmer temperatures!
Wednesday, November 13, 2019
Tuesday, November 12, 2019
Most of the snow will be wrapping up by Midnight Wednesday with gradually clearing skies heading into Thursday morning and afternoon. The rest of the week is expected to remain dry until either late Saturday night or Sunday afternoon.
It's morning's like this where you need to "dress for the weather". When it gets this cold, dress warmly in several layers if you have to spend a good chunk of time outdoors. It is important to cover as much skin as possible before taking that first step out the door. That means not only dressing up in layers, but putting on hats, gloves, scarfs, and those winter socks to keep yourself insulated and warm. Because any skin that is uncovered will be susceptible to frostbite, and you will higher your chances of getting hypothermia. Now that we are moving further into the season of "fall", it is important to know the signs of both. You can find all of that information by going to https://www.weather.gov/safety/cold-during.
Sunday, November 10, 2019
Where the snow is beginning to develop is where
A total of two to five inches of snow will be likely, with two to three inches falling during the overnight, and another two to three inches falling through the morning. Impacts to the commute Monday are likely with slick roads and reduced visibility. North winds will at times be gusting 25-30mph, and this will cause the snow to blow around as it falls, but also cause snow to drift and blow across roadways even after it stops.
Roads will likely be slick in the morning so give yourself the extra time you need to get to work, school, appointments, etc. There will likely be some impacts to the late afternoon and evening commute, especially for more open and rural roads/areas.