Another round of moderate-to-heavy snow is expected to fall over the state Thursday afternoon into Friday evening associated with a shortwave dropping into the region from Canada.
Snow will begin falling from northwest to southeast on Thursday, beginning in the early-to-mid afternoon in the northwest and closer to evening in the southeast. This will impact the evening commute for communities in the northwest to central parts of the state. As we get further into the overnight hours, snowfall will intensify, up to a half inch to an inch at times, with the heaviest snow falling from about 10:00 p.m to 3:00 a.m. over the state, again in the form of a dry snow as we saw with the last event. Snowfall should end before daybreak in the far northwest and closer to mid-morning farther southeast.
Winds will be relatively light initially, northwesterly at about 8-12 MPH. As the pressure gradient tightens, winds will increase to about 10-15 with gusts to 25. This will lead to travel concerns during the overnight while the snow falls, but some blowing snow can be expected further into the morning-to-afternoon hours Friday. Our main area of concern is along the entirety of Interstate 380 and Interstate 80 east of Des Moines. Those that travel in these areas should be extra cautious as they head into work on Friday morning!
As far as amounts go, six-to-eight inches is possible across much of east central Iowa, including the Waterloo, Cedar Rapids, Iowa City, Dubuque, and Davenport metro areas. These are the areas with concerns further into the morning hours on Friday, Outside of this, four-to-six inches is expected in the northeast half of the state, including Mason City, Spencer, Decorah, Fort Dodge, and Ames. Closer to 1-4″ can be expected in southwest Iowa with just a dusting in the far southwest. These amounts are subject to change as we get closer to the event as we still are over 24 hours out at this point in time.
In advance of this system, the National Weather Service has issued a Winter Storm Watch for the potential of heavy snow over east central Iowa. A Winter Weather Advisory has been posted elsewhere, where amounts will likely be lower. Details on times can be found on our active alerts page.
Another round of light-to-moderate snow will be possible across southern Iowa on Friday night. Additional information will be posted on that later tonight.
Stay tuned to the Iowa Weather Network for the latest information!