Weather

Miller A and Bs continue to show up

They have been largely absent the past 3 winters

Main storm tracks into Monday

If you’re new to following me on Twitter or here in the blog I’ve explained dozens of times the importance of a Miller A or an A-B hybrid to winter weather in the South. You can use a search engine to go in-depth if you’re unfamiliar.

What’s interesting is how often they’ve been showing up this Autumn and start to winter season after years of being MIA.

The next Miller A brings Atlanta rain again by Wednesday, with ICE and a little snow possible for parts of NC/SC into West VA and a snowstorm for parts of Virginia North to the New Englands states by Thursday into Friday.

WEDNESDAY 12/16 COMPUTER MODEL PROG CHARTS:

GFS ensemble 500mb forecast 12/16
GFS ensemble 500mb cyclonic relative vorticity 12/16
GFS ensemble shows classic CAD pattern for SE
GFS Ensemble surface weather chart forecast 12/16

NO two CAD events “wedges” are ever alike. And since it is 4-5 days away there WILL be changes in the forecast specifics.

The maps below ARE NOT specific to the possible event in the coming week but are merely for illustrative/educational purposes:

Wedge/CAD, Wikipedia
CAD Wedge
Wedge/CAD Cold Air Damming National Weather Service


Traditional classic CAD Wedge, Chris Robbins
Classic Cold Air Daming Wedge, SEweatheralerts
Snow to rain cross diagram, NC State and NWS

In case anyone can’t read and missed what I wrote above, ice is NOT forecast for Atlanta at this time, this is an educational-informational blog post.

It’s important to understand the Miller A/B and CAD because if and when Metro Atlanta gets ice or snow it is one or more of these type systems that will bring it. If it’s not one of these the Atlanta area usually gets little or nothing in terms of snow or ice.

For daily weather info follow me on Twitter @MellishMeterWSB.

Cox Media Group