More often than not forecasters can really nail down expected snow totals over a certain area. This is one of those cases where that might not be the case. Late this evening, the National Weather Service expanded the Blizzard Warning to include a few more counties in northeast Iowa (highlighted in red in the graphic to the right). Counties in green are under a Blizzard Watch and the blue counties are under a Winter Weather Advisory.
Tonight’s latest model runs show some indications the storm system could produce more snowfall over the eastern half of Iowa. Really it all comes down to when the precipitation will change from rain or a mix to all snow. For eastern Iowa, I expect this changeover to happen sometime between 9:00am and noon on Saturday.
Depending on where the heaviest snow bands set up between noon and 6:00pm, I am starting to believe the current forecasts of 1”-2” over much of east central and southeast Iowa might be a little bit too low. I would at least expand the range to about 1”-4” with locally higher amounts. At any rate, regardless of how much snow falls, wind gusts that at time could top the 50mph mark will blow it all around, creating blizzard or near blizzard conditions.
We will continue to monitor the latest from the National Weather Service and plan to write another full update early tomorrow morning. And don’t forget we’ll bring you our live coverage right here at iowachase.com beginning at 10:00am and running until 6:00pm on Saturday.