A “Miller B” type winter storm system

Long time follows have the knowledge of “Miler A” and “Miller B” type winter storm systems that affect the Southern and Eastern U.S.

Others can google the web machine :)

The system this weekend is a “Miller B”, with the low pressure storm tracks seen in the map above.

It includes “the wedge” pattern or “CAD event” which I’ve explained hundreds of times over the years, google if you’re unfamiliar.

The NORTHEAST CORNER of the state has the highest risk of significant ice accumulation from a wintry mix tomorrow evening that changes to just rain on Sunday. But...

In the far North and East suburbs of Metro Atlanta some ice accumulation is possible especially on elevated surfaces not in contact with the ground. The greatest odds as of now look to be Northern Hall County and adjacent areas. Some slippery spots possible on roads mainly bridges and overpasses.

For the majority of the Atlanta area just cold rain showers.

However, as I’ve explained in prior blogs all week long and in past years “the wedge” is notoriously tricky to forecast and most models lack the resolution to handle them well, we often find ourselves near or on the line between rain and ice or snow with a variance of just a degree or two making all the difference in the world, and the normal and expected margin of error in forecasts can NOT cover for that fact.

We will keep our eyes on ALL the lines but especially the “tweener” zone between green and orange.

Those lines are not written in stone and are not magic walls in the sky, but are a transition zone at least 30 miles North or South and can and will shift either direction in future forecast updates so stay tuned and check back.

SURFACE WEATHER CHART FIRST HALF OF SATURDAY: