Late-Week Snowstorm To Dip Into The South

Wednesday, January 23, 2013

AccuWeather reports the combination of lingering arctic air and two merging storms has the potential to spread a large swath of snow, wintry mix and slippery travel from the Midwest to the part of the South and Atlantic Coast at the end of the week.

As with many winter storms, it's complicated.

The storm scenario continues to trend colder and farther south than indications to start this week.

How much snow falls depends on how quickly two storms come together. One storm is coming from western Canada (an Alberta Clipper), and the other is a storm from the southern United States.

Midwest

Part of the Upper Midwest will be solely under the influence of the Alberta Clipper.

A broad area of snow and flurries will occur from around the Ohio River northward to the Great Lakes with coating to an inch of snow. Chicago, Louisville, Indianapolis, Cincinnati and Detroit fall within this area.

Part of this area could find a way into a heavier band of snow that brings a few inches. This is a little more likely farther east in Ohio, West Virginia and southwestern Pennsylvania, while areas farther west are more likely to have issues with dry air limiting the precipitation. Little or no precipitation is likely around St. Louis, but even a light amount of sleet or freezing rain can cause slippery travel.

A wintry mix and slippery conditions are likely from southwestern Kentucky to middle Tennessee including the Paducah, Ky. and Nashville, Tenn. areas.

Mid-Atlantic and the South

Farther east, the area from the northern Shenandoah Valley to Washington, D.C., Philadelphia, Atlantic City, N.J., and Dover, Del. northward to upstate New York, lie in a swath where it is a snow or no situation like that of the Ohio Valley states.

Colder air will have been around for a few days ahead of the late-week storm. As a result, the snow and wintry mix has a greater potential to adhere to paved and concrete surfaces, raising the risk of slippery conditions and travel delays.

It appears that farther south, a wedge of cold air will lead to snow and a wintry mix into northern and western North Carolina to a large part of southeastern Virginia and the southern Delmarva Peninsula. This includes the cities of Beckley, W.Va., Greensboro, Charlotte and Raleigh, N.C., Roanoke and Richmond, Va., and Salisbury, Md. Accumulations in this area would range from a slippery coating due to an icy mix to several inches of snow.

New York City, New England

Odds favor, cold dry air winning out around New York City and interior New England. It is possible that enough moisture from one or the other of the two storms produces a band of light snow in the area.

Southeastern New England (Cape Cod) is likely to share the same fate as New York City, unless the storms get together quickly and turn northward at the last minute. The more likely scenario being radar snow and a spotty light accumulation. The other outlier being an all-out blizzard.

Forecast Challenges

Just as the chance that the western Canada and southern U.S. storms may fail to come together, leaving spotty light snow from the Ohio Valley to the East, there is still the potential the two late-week storms to fully merge.

The latter would produce a swath of heavy snow over part of the South and farther north over the mid-Atlantic and southern New England.

Because of the extend of arctic air, it will not take a great deal of moisture to produce several inches of snow. In this case a tenth of an inch of liquid (rain) could yield 3 inches of snow. A typical liquid to snow equivalent for storms in the East is 10 to 1, where a tenth of an inch of water would yield an inch of snow or an inch of water would yield 10 inches of snow.

The arctic air has already unleashed locally heavy lake-effect snow even in areas missed by the path of the general storms this week.

The dense arctic air is playing a major role in driving the storms farther south.

AccuWeather.com will have further updates on the potential for snow as the week progresses. Remember to refresh your browser as we will be doing live edits within this story.



Copies Of Remaining Chattanooga Photo Books Available At Zarzour's Restaurant; By Mail

Remaining copies of the Chattanooga Photo books are available at Zarzours Restaurant on Rossville Avenue off Main Street. It is near Fire Hall #1. They include the Remarkable Stokes Collection, Railroads In and Around Chattanooga, and Paul Hiener's Historic Chattanooga.  All were published by Chattanoogan.com.  and printed by College Press at Collegedale. The ... (click for more)

Latest Hamilton County Jail Booking Report

Here is the latest jail booking report from Hamilton County: AGNEW, JOHN ROBERTSON  209 Old Mountain Rd Chattanooga, 37409  Age at Arrest: 23 years old Arresting Agency: Chattanooga DOMESTIC ASSAULT/AGGRAVATED --- ANGUS, WILLIAM DEAN  7 CENTRAL AVENUE TULLAHOMA, 37388  Age at Arrest: 35 years old Arresting Agency: Chattanooga Booked for ... (click for more)

Stormwater Fiasco And East Ridge Camping

When did the Chattanooga City Council get replaced by members of the East Ridge City Council? I don't recall a time in Chattanooga where they've voted to shoot the city in the foot more than they have lately.  If this goes through despite the environmental impact warnings and then Camp Jordan has increased flooding after spending millions on sports ball fields, ... (click for more)

Roy Exum: Why I Am Thankful

You would think that after 40 years of publishing an annual list of things for which I am thankful, I’d be getting to the bottom of it, but it seems the older I get I have found I appreciate so much more around me. I take absolute delight in planting a flower, feeding the birds and throwing a ball for my dog. I find that the more people who I come to know the more who I come to ... (click for more)

Rodney Stoker Wins Turkey Trot 8K Again

It has been about 15 years since Rodney Stoker captured first place overall in the annual Sports Barn Turkey Trot, but he’s been doing some serious training in recent weeks and it paid off Thursday morning as the 41-year-old former UTC standout was victorious with a time of 27 minutes, 18 seconds. Dylan Hassett, a promising 24-year-old from Atlanta who is making her way as a ... (click for more)

JOHN HUNT: Thanksgiving 2017 Special As Always

I can’t believe it’s that time again.  Another year has come and gone and where did it all go? My father once told me that time really flies as you get older and I’m starting to believe him. But we’re back to one of my favorite holidays of the year – Thanksgiving – and I’m looking forward to spending quality time with family and friends.  I’m sure that I’ll eat too ... (click for more)