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

December 18

From NWS
1976
: An abnormally cold December was interrupted by unseasonably warm weather on the 18th, particularly across about the southwestern third of Iowa where most locations climbed into the 60s. Many stations established daily records including Des Moines with a high of 64 F and Logan where the high of 72 F was only two degrees shy of the all-time state December record, which was set a full 12 days earlier in 1939. Other reported high temperatures included 64 F at Indianola and Mapleton, 65 F at Oakland, 66 F at Glenwood, Greenfield, and Jefferson, and 67 F at Sidney.

 This Day in National/World Weather History …
 18 December 1944 → The ships of the US Navy Task Force 38, seven fleet and six light carriers, eight battleships, 15 cruisers, and about 50 destroyers were operating about 300 miles east of Luzon in the Philippine Sea. A small but violent typhoon overtook the task force with relatively little warning. Many of the ships were caught near the center of the storm and buffeted by extreme seas and hurricane force winds. Three destroyers capsized and went down with practically all hands, while a cruiser, five aircraft carriers, and three destroyers suffered serious damage. Approximately 790 men were lost or killed. Fires occurred in three carriers when planes broke loose in their hangars and 146 planes on various ships were lost or damaged beyond economical repair by fires, impact damage, or by being swept overboard.
 18 December 1957 → An unusually late tornado outbreak for the time of year for so far north struck Missouri and Illinois. 18 tornadoes were rated F2 or greater. An F4 ripped through Jackson, Williamson, and Franklin counties in Illinois. Murphysboro was hard hit with 10 people killed. Sunfield, IL vanished completely as an F5 tornado swept it clean.
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Posted under Weather History

This post was written by Schnack on December 18, 2012