Major Winter Storm Wednesday Night & Thursday

UPDATED at 4:30 PM

Tonight: Mostly cloudy with some patchy fog. Low: 23-27. Wind: NE 5-10 mph.

Wednesday: Cloudy with a 70% chance of snow in the afternoon. High: 34-37. Wind: NE 5-15 mph.

Wednesday Night: Snow heavy at times. Low: 21-27. Wind: N 15-30 mph.

Thursday: Cloudy and windy (NW 20-40 mph) with an 100% chance of snow. High: upper 20s.

Friday: Mostly sunny. High: low 20s.

Saturday: Mostly sunny. High: low-mid 20s.

Sunday: Mostly sunny. High: low 20s.

Monday: Mostly cloudy. High: low 20s.

Christmas Day: Mostly cloudy with 20% chance of snow. High: low 20s.

There will be some patchy fog overnight and as temperatures drop below freezing there could be some slippery spots on the roads.  Please drive with caution tonight.

Now for the pending blizzard…

The National Weather Service has upgraded part of the Winter Storm Watch to a Winter Storm Warning. See maps below.

We have been tracking this storm since last week. The forecast track has not changed from yesterday. The map below shows the forecast track.

Snow: The track still puts eastern Iowa in the ideal position to get heavy snow. Light snow will develop Wednesday afternoon with the snow increasing in intensity after the sun goes down. Heavy snow is likely Wednesday night and Thursday morning. The snow will taper off Thursday afternoon.


Wind: As low the low moves east of the Mississippi River it will strengthen and will result in a strong wind. The wind will increase Wednesday evening and be the strongest Wednesday night through Thursday night. The wind will be from the north and northwest at 20-40 mph. This will cause considerable blowing and drifting snow. Blizzard or near blizzard conditions are expected late Wednesday night through Thursday. The wind will diminish late Thursday night. The snow drifts from the wind and snow combined will be measured in feet. Country roads will probably drift closed. Removing snow will be difficult Thursday due to the wind. Friday the wind will be light making for snow removal much easier.

After the storm moves northeast, high pressure will bring cold air and lots of sunshine Friday and Saturday. Low temperatures at night with new snow and little to no wind will be near zero and the usual colder locations below zero.

Dry and cold weather will be around Friday through Monday. There is a chance of snow on Tuesday (Christmas).

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Posted under Forecast Discussion, Winter Weather

This post was written by Schnack on December 18, 2012

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