Blizzard Conditions Tonight and Thursday

UPDATED at 4:10 PM

Tonight: Snow heavy at times with blizzard conditions. Low: 23-28. Wind: NE 15-30 mph.

Thursday: Snow heavy at times before noon. Strong wind causing blizzard conditions all day. High: 25-30. Wind: NW 20-40 mph.

Thursday Night: Clear and windy with blowing snow and near blizzard conditions. Low: 5-9. Wind: NW 20-30 mph.

Friday: Mostly sunny. High: low 20s.

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

Sunday: Mostly sunny. High: low 20s.

Monday: Mostly cloudy. High: mid 20s.

Christmas Day: Mostly cloudy. High: low-mid 20s.

Wednesday: Mostly cloudy with a 20% chance of snow. High: low 20s.

A BLIZZARD WARNING is in effect through Thursday night for all of eastern Iowa.

An area of low pressure is centered over the Oklahoma panhandle early this afternoon. The forecast track is expected to move northeast into central Illinois by Thursday morning and Michigan by Thursday evening.

There is some warm air across southern Iowa this afternoon with rain showers. There will be a rain/snow mix as the precipitation begins to fall this evening south of Highway 20. The transition to all snow will occur fairly quickly tonight. North of 20 is expected to be all snow. The snow will increase in intensity as we get closer to midnight. Heavy snow will fall from midnight to about noon Thursday. Snowfall rates will be 1-1.5” per hour. The wind will increase after midnight and remain strong through Thursday causing blizzard conditions. The snow will taper off Thursday afternoon. Here are the storm totals:

Later tonight and Thursday the roads conditions will be terrible. Travel is not recommended after midnight into Thursday morning. The wind will be strong enough to produce snow drifts up to four feet in some locations. Country roads will most likely drift closed. Do not travel later tonight and Thursday morning unless you absolutely have to.

The wind will not diminish until early Friday morning.

Once the storm moves away, high pressure will move into the Midwest with dry weather and cold temperatures. More clouds are expected early next week with a chance of snow Wednesday.


Posted under Forecast Discussion, Winter Weather

This post was written by Schnack on December 19, 2012

December 19

From NWS
: December was an intensely cold month with particularly bitter temperatures prevailing from the 18th-26th. During the first several days of this stretch the coldest temperatures were reached on the morning of the 19th when most areas fell into the 20s below zero, excepting south central and southeastern sections where lows were in the teens below zero, and many stations established daily records that still stand today. Even in southwestern Iowa temperatures fell to remarkable levels for so early in the season, including readings of -25 F at Glenwood and Shenandoah and -33 F at Atlantic. After the Atlantic reading the lowest reported temperatures included -27 F at Decorah, Northwood, and Sibley, -28 F at Elkader and Ida Grove, -29 F at Pocahontas, and -30 F at Cresco. After the second stretch of particularly intense cold from December 22-25, the month finished as the coldest December on record in Iowa.


Posted under Weather History

This post was written by Schnack on December 19, 2012