The Quad Cites are where it’s at. Just a fun teaser: This is going to be the first winter storm forecast of the season. Ooooh.
At 752PM, CT, DAvenport was reporting a temperature of 34 degrees and clear skies. Eastern Iowa finds itself south of a strong, gusty area of low pressure, which is cycling in a healthy amount of cold air on the back of a stiff westerly breeze. The upper level trough is broad with a strong jet flowing through the base of it, so cold air isn’t expected to recede despite what will be a mainly pleasant morning tomorrow.
A jet streak embedded within the broader jet stream has developed over southern Idaho. This will lead to some increased vorticity and cyclogenesis, all embedded within a relatively moist, cold environment. Along the jet stream, expect training precipitation to arrive in eastern Iowa tomorrow afternoon , with the sharpest turning in the atmosphere developing in the Upper Mississippi Valley. The system’s heaviest precipitation will stall over eastern Iowa overnight Friday into Saturday, until the surface feature can get organized. The broader wave is quite longwaved, but the embedded feature is shortwaved, and clearing will come shortly after noon on Saturday, but only after around 6″ of snow falls on town.
Tomorrow – Rain snow mix in the afternoon, turning to all snow, High 42, Low 28
Saturday – Heavy snow through the morning, then clearing quickly. High 31, Low 13
TWC: Tomorrow – PM Showers late snow, High 44, Low 27
Saturday – AM snow/Wind (6-9 inches total) High 30, Low 16
AW: Tomorrow – Mostly cloudy with a shower in places in the afternoon (snow late) High 43, Low 26
Saturday – 1-3 inches of snow early in the morning; windy and colder with clouds giving way to some sun (2-6″ total) High 31, Low 15
NWS: Tomorrow – A 40 percent chance of rain, mainly after 5pm. Increasing clouds High 44, Low 28
Saturday – Snow likely before noon. Cloudy through mid morning, then gradual clearing, (~7″ total) High 31, Low 15
WB: Tomorrow – Partly sunny in the morning then cloudy with a 50% chance of light rain in the afternoon. Snow late, High 43, Low 29
Saturday – Blustery, colder. Cloudy with snow likely in the morning, thenn mostly sunny in the afternoon (5-6″) High 31, Low 14
WN: Tomorrow – Mostly Cloudy with Chance of Light Wintry Mix High 45, Low 28
Saturday – Partly Cloudy with Scattered Snow Showers High 30, Low 28
FIO: Tomorrow – Mixed precipitation (1–2 in. of snow) starting in the evening. High 44, Low 29
Saturday – Snow (2–5 in.) until evening. High 36, Low 15
The temperatures for WeatherNation don’t go far enough out to get to a midnight low, as everyone else did. They also don’t give snow totals, so we can’t verify against the crowd. That’s just for fun. Isn’t 6″ of snow fun? Take a look at the satellite. The clouds massing in the northwestern US will ultimately turn into tomorrow’s snows.