Severe WX December 29 & 30, 2021 Severe Threat

[OHWX97]

Very strangely shaped polygon that narrows to a point on the northeast end.

The warning was issued by JAN. The polygon is shaped so weird because north of it is MEG's area of repressibility.

 

[CheeselandSkies]

The warning was issued by JAN. The polygon is shaped so weird because north of it is MEG's area of repressibility.

Ah, I see Memphis now issued their own warning. Almost looks like two areas of rotation now, one northeast and one southwest of Bellefontaine.

 

[Jetstream]

Warning extended to Chickasaw Co. Some of Calhoun Co. as well

 

[Austin Dawg]

The warning was issued by JAN. The polygon is shaped so weird because north of it is MEG's area of repressibility.

Can anybody tell me why the line of storms west of Columbus looks so different on the Columbus radar than it does on the Jackson in Memphis radars?

 

[CheeselandSkies]

Southwestern cell just popped a meso marker on GR Level 3, but as far as I can tell the warning only refers to the lead one. Both are within a larger severe thunderstorm warning polygon.

 

[OHWX97]

Southwestern cell just popped a meso marker on GR Level 3, but as far as I can tell the warning only refers to the lead one. Both are within a larger severe thunderstorm warning polygon.

That one is clearly becoming more dominate than the leading cell.

 

[ghost]

I just checked again and our temp has climbed rapidly to 66F.

 

[Hailey]

The storm in redbay is starting to hook and is getting some rotation to go along with it

 

[CheeselandSkies]

That one is clearly becoming more dominate than the leading cell.

Looks like another little cell (also with a hook) just popped up in its inflow region. These mergers often take a while to sort themselves out, sometimes they cause a would-be dominant cell to peter out, and sometimes they abruptly absorb the other cells and explode in intensity.

 

[Clancy]

 

[Tennie]

Looks like another little cell (also with a hook) just popped up in its inflow region. These mergers often take a while to sort themselves out, sometimes they cause a would-be dominant cell to peter out, and sometimes they abruptly absorb the other cells and explode in intensity.

Let's wait and see which of those options this particular cell will choose...

 

[Equus]

Very impressive low level shear environment for those NW AL cells, appears to be a small surface low in NE MS there shifting winds to the SSE and greatly increasing low level helicity right along the thermal boundary

 

[CheeselandSkies]

I don't expect anything quite on that caliber tonight, but the 12/10 beast cell seemed to struggle for a while, rapidly organized as it approached Jonesboro/Bay and put down a series of small tornadoes, then found top gear as it passed near Lake City and produced the first of the two long-track violent monsters.

 

[MichelleH]

RadarScope keeps showing TVS signature on the Russellville, AL cell.

 

[W4TVS]

RadarScope keeps showing TVS signature on the Russellville, AL cell.

The Columbus Radar keeps putting a TVS on that cell...

 

[Equus]

This has got my attention, we have a mesolow developing in the line across NE MS and that's riding along the still very obvious thermal boundary backing surface winds even further; that is definitely a volatile low level shear environment IF the cells out ahead can get rooted in the warm sector. That's essentially forming a triple point around Russellville so it's not surprising to see the low level velocities on those cells get cranking big time

 

[Equus]

That said, cells ahead of the line seem to be struggling to get going, so they haven't been able to take advantage of it; either way the line will probably start spitting out tornadoes with a shear environment like that

 

[Jetstream]

One that now has my attention is the cell near Philadelphia Ms.

 

[Chris3024]

One that now has my attention is the cell near Philadelphia Ms.

That storms motion is more to the east, then northeast also

 

[bwalk]

Some weak to low moderate rotation on the cell that just passed Russellville.