Accumulating Snow Possible Tomorrow

Lots of Forecast Uncertainty
2020 CJ Surface Map

Good evening… we are watching a couple of features on the weather maps tonight. The first is a warm front sitting just to our south. This front has been the cause of some light snow that has been falling across parts of the area during the afternoon into the early evening. The snow from this front should gradually taper off with little accumulation later this evening. The second feature is a low pressure system moving through the Pacific Northwest. This system will cross the area tomorrow and tomorrow evening and bring a good shot at snow. Temperatures will also play a role in this system as they will be warm enough for liquid precip to mix in with the snow. When and where this occurs will have major implications as to how much snow actually falls. Because of this, snowfall amounts with this system may need to be lowered.

For tonight, look for a slight chance of light snow this evening with that warm front to our south. Little accumulation is expected. Look for clouds to hang on through the night as temperatures drop in to the lower to middle 20s.

As we head into Monday, look for snow to move in during the mid-morning hours, then continue into the afternoon and evening. The snow may be mixed with freezing rain or even rain, especially across northeastern Iowa and southwestern Wisconsin. Snow totals will range from 2” to 5” across areas along the I-90 corridor, lesser amounts of 1”to 3” look likely farther north. In addition to the snow, a light glaze of ice is also possible. Should liquid precipitation become more dominant, then snow totals may be dramatically lower. A WINTER WEATHER ADVISORY has been issued for much of the area for tomorrow. Be sure to monitor road conditions as they are expected to become snow covered and slick. In addition, a light glaze of ice could form. It should be noted that confidence in this forecast is quite low and it is quite likely snow amounts may be tweaked over the next 18 to 24 hours, so be sure to check later forecasts. Because of the threat of accumulating snow and ice, we are calling tomorrow and ALERT DAY. Look for highs in the lower to middle 30s.

As we head into tomorrow night, look for evening snow or a mix to gradually end by mid evening with little additional accumulation. Temperatures will slip back into the teens to near 20.

Tuesday will bring a partly cloudy day, with highs in the 20s.

Looking ahead… much of the week looks dry, but we’ll have to deal with another one of those short-lived arctic blasts. Look for highs to tumble into the teens Wednesday and Thursday, with lows in the single digits and teens below zero at night. By Friday, we say goodbye to the arctic air and say hello to much milder temperatures. Look for temperatures to return to the 30s Friday, then rise into the 40s for next weekend and early the following week. This could set the stage for a really nice weekend.

Our next chance of precipitation arrives next Monday. It appears to be warm enough for a rain and snow mix that changes to all rain by afternoon.

Have a great night and be sure to check later forecasts regarding tomorrow’s snow potential as I am expecting additional tweaks to snow totals. –WKBT Cory Malles