Clear and feels like 22°
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40° / 27°
42° / 28°
49° / 40°
51° / 33°
39° / 25°
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First Alert Forecast
The STORM MODE INDEX is a 3 out of 5 for the upcoming winter storm set to arrive around 4pm this afternoon through Wednesday morning. Roads are likely to be snow covered and icy.
Tuesday morning will be cloudy, but dry. Temps will be in the low 20s, setting the stage for air cold enough for snow by the afternoon. High temps in the afternoon are forecast to reach the low to mid 30s, but could trend colder due to cooling effects in the atmosphere while snow attempts to develop.
Moisture will actually move in overhead in the early afternoon hours but will have to fight through a very dry lower atmosphere. Snow onset is most likely between 4pm and 7pm from south to north through mid-Missouri, when the atmosphere finally becomes saturated.
Snow will fall at a moderate speed and winds will gust around 25 mph. This will lead to low visibility. It will begin accumulating on surfaces pretty quickly after it begins to fall. It will likely be more of a wet snow even from the beginning, but certainly as it gets going. This is because temperatures at the surface will be within two degrees of the freezing mark most of the night.
Eventually, between 9pm and midnight, warmer air will infiltrate the system. This will force snow to change into sleet (briefly) and freezing rain. This will create ice accumulations on surfaces and will wash away pretreatment on roads.
The entire system is expected to exit between 7-10am on Wednesday morning.
Areas south of I-70 will see more sleet, freezing rain and regular rain than snow and therefore snow accumulations will be lower, with 1 to 2 inches possible. Then, a glaze of ice up to 0.10" is possible. The lower accumulations will also because temps could periodically warm enough to produce regular rain every now and then, melting some of the previous accumulation a bit. This area has the best chance to have an okay Wednesday morning commute.
Areas within the I-70 corridor and north will see more snow and less of the mix, with 2-4" possible and a glaze to 0.10" possible.
For those north of HWY 36, the precipitation type will be mainly snow and these areas in northern MO could see 3-6" of snowfall accumulation. However, depending on how far north the freezing line gets and how much freezing rain/drizzle hang on Wednesday morning, up to 0.10" of ice cannot be ruled out.
We'll be tracking temps very closely. Slick road conditions are expected Tuesday late afternoon through Wednesday morning and travel is not encouraged during this time. The good news is that temps should warm above freezing by late morning on Wednesday and this will leave the noon and afternoon commute in much better condition. Some areas may reach near 40 on Wednesday.
A wintry mix will continue into early Wednesday morning and will keep roads icy at least until 9am for those in central and northern MO. Eventually, temps will go above freezing and as warm as 40 degrees. This will melt all ice and most snow on roads. A re-freeze is expected Wednesday night with lows in the middle 20s.
High pressure will move in overnight, leading to dry conditions, but cloud cover may hold on. Temps should reach near 40 degrees under partly to mostly cloudy skies.
Warmer weather and sunshine will continue to move into Missouri and most snow will have melted by Friday afternoon as temps look to rise into the upper 40s.
Possibly the warmest day of the week comes Saturday with spring-like rain showers in the forecast throughout the day. Temps will be in the upper 40s to low 50s, cooling back to the 30s for Sunday. A few flurries are possible Sunday morning.
Stay tuned right here, on air and on the free KOMU 8 Weather & Traffic app for the latest forecast updates.
KOMU 8's interactive radar provides a customizable radar map for Columbia and mid-Missouri.
Get updated on highway conditions from MoDOT before you head out on the road.