Oh, Northern Iowa. You thought you were done with winter didn’t you? Looks like we might have jinxed it. After a warm couple of days with a severe weather threat on Friday, Iowa looks to return to the winter wonderland on Saturday as cold air plunges back into the area on the backside of a low pressure system late Friday night.
The aforementioned low will setup shop in northwest Missouri early Saturday morning with a cold front draped to the south and a warm front to the northeast. Precipitation will be well-developed by this point, with a changeover to snow beginning in northwest Iowa in the late evening to overnight hours. There may be a brief period of light sleet or freezing rain during this transition, but the warm component of this system should not last long with a rather quick transition to snow.
Precipitation should be completely changed over to snow over much of northwest Iowa by 8 or so Saturday morning. We should see improvement by the time Saturday evening and night comes around in the northwest, with snow continuing farther southeast with blowing snow continuing into Sunday morning. Coupled with winds at 40-50 MPH, blizzard conditions and dangerous travel can be expected.
Moderate-to-heavy snowfall accumulations are expected over our far northwest Iowa counties, however, uncertainty exists on how heavy these amounts will be and how far to the southeast this axis will extend. The heaviest amounts will fall in areas such as Lyon county and further into South Dakota and Minnesota where a deep frontogenic band establishes itself. A Winter Storm Watch is in effect for ten counties in northwest Iowa from late Friday night through late Saturday night. This is where confidence is currently highest for these winter issues. Expect this area to potentially be expanded further southeast as we go on through time.
Stay tuned to the Iowa Weather Network for the latest information!