Posts Tagged ‘Illinois Valley’

Dangerous Temperatures & Wind Chills

Temperatures Tuesday evening dropped to below zero north of the Quad Cities before southerly winds brought in slowly rising temperatures.

Sterling, Illinois, dropped to -5°, while Davenport dropped to zero.

The coldest air of the season arrives tonight and Thursday morning.

Low temperatures will drop to below zero across all of the Mississippi and Illinois Valleys.   When the winds are factored in, it’ll feel like -20° to -30°, which is very dangerous if you have to be out for any period of time.


A “Wind Chill Advisory” goes into effect Wednesday evening through 10 a.m. Thursday.

Highs Thursday will likely stay in the single digits in our northern hometowns to around 12° in the Quad Cities and 15° in our southern hometowns.


Light snow will break out late Thursday night into Friday morning.  The best chance of seeing light accumulations during that time period will be around the Quad Cities to the northwest.

Snow will really kick in Friday afternoon into Saturday morning.  South and east of the Quad Cities, warm air aloft could cause the snow to change to sleet and then freezing rain.

While that’ll cut back on snow accumulations there, icy conditions will make it more dangerous.

The wintry mix will change back to snow Saturday before ending by evening.

Several inches of snow are likely.  By Thursday, I’ll have a much better idea of accumulations.

It gets even colder Sunday with highs only in the single digits with a low of -10° Sunday night.  That’s the temperature and not the wind chill!

The bottom line:  Bitterly cold temperatures through early next week and a winter storm is likely this Friday and Saturday.


Next Snow Looking Much More Likely

AFTERNOON UPDATE:  Sunday, February 24, 2013, 3:52 p.m.

After checking out the new GFS and NAM models this afternoon, there is no real reason to change my thoughts on the upcoming storm.

The only big deal is that it may be daybreak Tuesday before the snow makes it to the Quad Cities.

At this point, the worse case scenario is that the snow totals may be on the low end of the range that I gave earlier today.  However, it’s still too early to commit to that.  As I stated before, that’s a good starting point and I’ll leave everything the way I had it this morning.

Here is the new winter storm severe weather map.  Notice from this morning that to our south in northern Missouri, the “Watch” is now a “Winter Storm Warning”.


ORIGINAL POST:  Sunday, February 24, 2013, 8:42 a.m.

The snowstorm that I’ve been talking about for a few days for Monday night and Tuesday is looking more and more likely to be a big snow for the Quad Cities.

A “Winter Storm Watch” goes into effect late Monday night into Tuesday evening for much of the Mississippi and Illinois Valleys.  While Dubuque County, Iowa, and Jo Daviess and Stephenson counties in Illinois, are not included in the watch, at this time, you will see snow, too.

Today is going to be a perfect day with plenty of sunshine with highs of 33-38°.  While there will be more clouds Monday with the approaching storm, it’ll be seasonal with highs again in the 33-38° range.

As it looks right now, your Monday evening commute should be problem-free with the snow beginning after midnight into the pre-dawn hours of Tuesday.

This is NOAA’s GFS map for 6 a.m. Tuesday.

The heaviest snow with this system will fall Tuesday and Tuesday night.

Here are the maps for noon Tuesday and 6 p.m. Tuesday.  That heavier snow is indicated on these maps with the dark greens and blue.

While this storm is still about two days, there will likely be some slight shift in the storm’s path.  What is certain is that we’re likely going to pick up a decent snow.  What could change is the exact location of the heaviest snow.

Two days out and subject to change due to storm track and intensity, I’d say we’ll see anywhere from 3-5″ of snow around Iowa City and Dubuque, Iowa, over to Galena and Freeport, Illinois.

In the Quad Cities, Muscatine, Wapello, Fort Madison, Burlington, and Keokuk, Iowa, and Sterling, Mount Carroll, and Princeton, Illinois, 5-7″ could fall with the next system.

Right now, I’m expecting 7-9″ of snow from around Monmouth, Macomb, and Galesburg, Illinois.

These totals will mostly likely be altered and fine-tuned as we get closer to the storm.  This is just to give you a ball park, starting point of how much snow to expect.

Enjoy your Sunday!  I plan on making the best of my Sunday with an anniversary brunch (yes, we’re still celebrating), movies, and the Oscars, with a  later afternoon weather update thrown in there for good measure.