What happened to 97L?

[Brent]

http://www.ssd.noaa.gov/PS/TROP/DATA/RT/WATL/IR4/20.jpg

[Josephine96]

My thoughts exactly Brent.. I think shear had something to do with it..

Maybe it'll reorganize and develop better at a later time.. I don't know

[Derecho]

Not shear in the classical sense everything thinks about it. It certainly wasn't decapitated by strong shear.

[HURAKAN]

I though it was going to refire again during the overnight hours as it has done during the last few days but maybe shear was stronger than what we expected.

[Air Force Met]

Right...it was not classical shear. It was sheared by the fact it was moving too fast. Had it been moving at 10 kts...the southwest shear was nothing it could not have handled...it wasn't that strong until you coupled it with a strong west motion.

[Derecho]

No, it moving too fast is still shear.....

Actually the speed issue doesn't seem to be all that material either. It would have LOOKED like classical-getting-the-top ripped off.

It actually entered a very complex col, and the issues with convection seem to be more convergence-divergence related than shear.

And it DID slow down markedly. It actually lost its convection when it slowed down.

[Anonymous]

It was the dry air, according to the tropical outlook via Accu Weather. After the wave weakened, the dry air decreased some, so the two cancelled each other out................

[stormchazer]

I agree kenl....the wave entered a pocket of dry, sinking air and it killed it. I thought if the circulation survived, it might re-fire this morning, but even that seems to have been killed.

[rbaker]

I believe the flare ups were associated with the ull when it was close to the ull, but in true fashion would wane out in afternoon and evenings. In fact llooking at sat. pictures the western side of flare ups had no inflow, and the east side always looked sheared. Now that the wave has gone futher west from the ull, there is no affect from it. Now its strong easterly shear. In fact as I was dissusing with stormchaser 16, winds were blowing in two different directions very close to the thunderstorms, just south of main convection west winds, and to the north east winds.

[tailgater]

Which area are you referring to rbaker I'm watching the area west of Jamaica looks like there could be a collaboration in this area later but strong easterly sheer will be preventive.

[Anonymous]

Rbaker is correct...the shear was the main reason this ever had convection while in the E Caribbean. The ULL to the N induced strong shear, which in turn lead to divergence aloft over 97L. The end result...more lift and more convection. The situation was good for convection but terrible for true tropical organization.