A long duration winter storm is expected to hit the central US later tonight through Thursday with Iowa on the northern edge of the event so read on for the details…
A cold front will slide through the state today with gusty northwesterly winds around level 2 on my wind scale. Temperatures will then crash later this evening back into the teens and single digits across the state. Even areas below zero across northern Iowa later tonight. The event will start with snow across southeastern Iowa later tonight and continue overnight into Wednesday. We will see snow come to an end across the southeast part of the state by later Wednesday afternoon. A second wave of snow will follow on Thursday but I do think this will be mainly south of the state.
The main uncertainty to this forecast is the northern extent of the amounts including the trace-2″ area seen below. This can easily bust due to the cold dry air sliding in from the north. Regardless, snowfall accumulations will be fairly light with the exception of an area across extreme southeastern Iowa in for a quick 2-6″ of snow accumulation. In addition to the precipitation, we will have breezy north/northeasterly winds on Wednesday with around level 1 and isolated spots of level 2 on my wind scale. The temperatures, snowfall forecast and wind risk is below.
Low Temperatures Tonight –
Snowfall Forecast –
Iowa Storm Center Wind Gust Intensity Scale –
Level 6. Damage may occur to buildings and trees. Power outages possible. High Profile Vehicle Roll-Over Likely. Do NOT recommend traveling in this zone.
Level 5. Some trees are broken, building damage possible. High Profile Vehicle Roll-Over Likely. HIGH WIND WARNING CRITERIA
Level 4. Slight damage may occur to trees/buildings. High Profile Vehicle Roll-Over Possible.
Level 3. Small branches may break, walking is difficult.
Level 2. Large trees sway, becoming difficult to walk. WIND ADVISORY CRITERIA
Level 1. Small trees sway, breezy
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