Monday, March 18, 2013

Supercells Erupting Over Alabama, Georgia

An absolutely vicious cluster of supercells is erupting over Mississippi and Alabama, partially into Georgia as well at this time.

Radar imagery indicates isolated supercells are blossoming over the aforementioned states this afternoon as instability and shearing become conducive for severe weather. An overview of instability parameters reveals the strongest buoyancy is to the south of these supercells, but a sufficient level of energy is on hand for these cells to really get going. Wind shear analysis shows that these storms are pumped with 40-60 knots of shearing- more than enough for severe weather. Composite analysis by the Storm Prediction Center tells me the highest tornado threat is not centered in the supercells crossing into Georgia, but is actually centered over central Alabama. A combination of enhanced spinning and additional instability in the midsection of AL is allowing an increased tornado potential to evolve, making for a very dangerous situation over much of the Gulf Coast this afternoon.



Anonymous said...

Those are NOT isolated supercells. Isolated supercells imply that they are on their own for quite a few miles: 50-100 miles. Only one tornado was reported yesterday all the way up in Tennessee.

Andrew said...

Anonymous at 7:15: They were isolated supercells in that they were not in a cluster and were abnormally strong. Not all supercells produce tornadoes, contrary to popular belief.

Anonymous said...

1) I doubt you could tell me how many supercells produce tornados (it's about 30 percent). 2) You made it sound like the earth was going to end down there due to these supercells. 3) You don't forecast severe storms with indices. You need to look at soundings, hodographs, and do a lot of analysis work. Simply looking at maps of EHI and CAPE is not NEARLY enough. Read a book or two on it. 4) They were not isolated supercells. Have some humility, instead of changing the definition of isolated just so you seem right. "They were isolated in that they were not in a cluster". Way to not make that clear.

Andrew said...

Anonymous at 8:37: Not about to get into a big argument with you, that's a waste of my time. It is worth noting that a total of five tornadoes were reported from yesterday's event. Also, I would appreciate it if you would crank down the attitude- this isn't a screaming debate and condemnation, this is a civilized weather blog.