A strong winter storm is set to impact Iowa late Sunday through late Monday. A mixture of snow and freezing rain will spread northward across Iowa late Sunday night and early Monday morning. The greatest threat for freezing rain will be across southeast Iowa while the best threat for heavy snow will be over western and northern Iowa.
Freezing rain and snow will spread into southern Iowa late Sunday night. Freezing rain will persist across southern Iowa through the morning on Monday before transitioning to snow. The snow will persist through the rest of the day on Monday and into Monday night.
Total snow amounts are still all over the board due to the track of the low as shown in the graphic above. The GFS and GEM continues to track the low into central Illinois, which places the heaviest snow across central and eastern Iowa. The ECMWF brings the low across eastern Iowa, which places the heaviest snow across northwest Iowa. For now, snowfall totals will range from a few inches across southeast Iowa to as much as 10″ across western Iowa with locally higher amounts possible. These totals will need to be adjusted depending on the track of the low.
The greatest potential for ice will be across east/southeast Iowa. At this moment, total ice amounts will range from 0.1″ to as much as 0.3″ to 0.4″ with locally higher amounts possible over southeast Iowa.
Winds will increase out of the east to northeast during the morning on Monday and reach sustained speeds of 25-mph to 30-mph with gusts over to 40-mph. These winds will lead to blowing snow conditions in the north and may help take down tree branches and power lines in the south. Snow and ice will lead to hazardous travel conditions. Ice buildup may lead to downed power lines and tree branches.
Continue to check back for all of the very latest updates over the next 24 to 36 hours.
For additional information, follow me us on Twitter @IAStormChasing, or me on Twitter @StormChaserZach. You can also follow me on Facebook by clicking the following link: https://www.facebook.com/Zach-Sharpe