Severe Weather Threat May 20-21, 2025

[AJS]

storm is ramping up on a path just south of florence proper. looks to hit muscle shoals head on.

Yeah; that rotation is coming together pretty quick.

 

[Grand Poo Bah]

I think the fact these storms have initiated so much earlier than modelled the last few days has helped a lot. By the time the LLJ reaches them they've already reached the messy stage (for the most part).

 

[lake.effect]

Florence storm has a classic flying eagle structure, huge hook, rotation isn't tight yet but getting stronger

 

[Kds86z]

I think the fact these storms have initiated so much earlier than modelled the last few days has helped a lot. By the time the LLJ reaches them they've already reached the messy stage (for the most part).

Shhh

 

[Tennie]

storm is ramping up on a path just south of florence proper. looks to hit muscle shoals head on.

Brett Adair reports cool outflow forward of the mesocyclone. At the least, that should delay tornado development (at least unless/until the meso starts pulling in the outflow boundary...).

 

[Beachwalker]

That Iuka-Florence storm may be the one of the day. Really tracking due East. Down in the southern area.

 

[ColdFront]

Rapid motion on Campbellsville camera. Could have a touchdown soon

 

[Clancy]

Hodos are beginning to improve over parts of Mississippi and Tennessee. Correlates with a modest increase in low-level SRH across the same area. Expect this to continue and migrate eastward.

 

[kcyalater]

that is one mean looking monster fred is narrating.

 

[Clancy]

TVW had what appeared to be a lowering, maybe a tornado near Mt. Pleasant, TN.

 

[AJS]

Could be on the ground soon.

 

[TornadoFan]

Brett Adair reports cool outflow forward of the mesocyclone. At the least, that should delay tornado development (at least unless/until the meso starts pulling in the outflow boundary...).

Needs to start sucking in that boundary like its speghetti.

 

[ColdFront]

Environment of the Mt Pleasant cell. Rapidly improving in terms of tornado production.

 

[Clancy]

Tuscumbia, AL storm is intensifying.

 

[kcyalater]

couplet is TIGHT now. tornado likely imminent.

 

[Shakespeare 2016]

Wow, I think we are all starting to get tornadoed out. I know tornadoed isn't a real word but I think you know what I mean.

 

[NorthBamaWX]

BASEBALL SIZE HAIL IN FLORENCE

 

[lake.effect]

Rotation is getting tight west of Murphresyboro, TN

 

[Clancy]

Goliath, long-lead-time SVRC in northern AL now, for the hail threat associated with the Tuscumbia supercell.

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
457 PM CDT Tue May 20 2025

The National Weather Service in Huntsville Alabama has issued a

* Severe Thunderstorm Warning for...
Northwestern Madison County in north central Alabama...
Limestone County in north central Alabama...
Southeastern Lauderdale County in northwestern Alabama...
East central Colbert County in northwestern Alabama...
Northeastern Lawrence County in northwestern Alabama...

* Until 600 PM CDT.

* At 456 PM CDT, a severe thunderstorm was located over Sheffield,
moving east at 45 mph. This storm has previous history of
producing golfball size hail.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.

* Locations impacted include...
Madison, Cartwright, Northwest Alabama Regional Airport, French
Mill, Coxey, Florence, Oakland, Harvest, Tuscumbia, and Killen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

A Tornado Watch remains in effect until 1000 PM CDT for north
central, northeastern and northwestern Alabama...and Middle
Tennessee.

&&

LAT...LON 3492 8780 3493 8670 3465 8672 3473 8783
TIME...MOT...LOC 2156Z 268DEG 39KT 3479 8770

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

 

[Kolle]

I am late in posting this, but here is the 3pm sounding from UAH. We have AMPLE amounts of chonky CAPE, but the wind shear is very limited. If the LLJ increases after sunset, anything that forms ahead of the main line could be nasty.