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Severe 3/17/21 Severe Weather Outbreak Al/Ms/Tn/Ar nowcast

That WAA is no joke. This keeps trending worse the closer it gets. Around what time is initiation of round 1 expected?

EDIT- nevermind, things starting to pop off as we speak.
 
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All 3 of those cells looking like Danger really quick! I applaud Alabama districts for closing schools... we don’t here in Georgia... until after the fact due to damage... I’m afraid for all the teachers driving to work and buses on the road tomorrow morning when that horrid line comes through. I do not like being in a hatched tornado area!!! We have several Alabama folks that teach here in Troup county.
 
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URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 29
NWS Storm Prediction Center Norman OK
1135 AM CDT Wed Mar 17 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Western and central Alabama
Central to eastern Mississippi

* Effective this Wednesday morning and evening from 1135 AM until
700 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

* Primary threats include...
Numerous tornadoes expected with a few intense tornadoes likely
Scattered damaging winds and isolated significant gusts to 80
mph likely
Scattered large hail and isolated very large hail events to 3
inches in diameter likely

SUMMARY...Numerous discrete supercells are expected to develop this
afternoon capable of producing strong to intense tornadoes.
Click to expand...

95/90 probs
 
Can someone explain why Huntsville NWS declined to put all the counties outlined by SPC in the watch? I've noticed this happens from time to time with different offices so just curious
 
Looks like the two cells joined together broad rotation but if it gets tight this one will be a big booger. Screenshot_20210317-124344.pngScreenshot_20210317-124337.png
 
blitzgunner said:
It is still pretty cloudy in Birmingham. If the sun can’t break out today does that lessen the chance of tornadoes occurring?
Click to expand...
The sun and heat helping fuel storms are just one ingredient of many for tornadoes to form. It can help limit the chances if cloudy but in no way means tornadoes aren’t possible just because it’s cloudy before hand. The Nashville ef3 tornado last March is probably a great example of this. That day just didn’t feel like a bad tornado day and wasn’t very warm that I recall.
 
The area outlined in the recent watch will be the most favorable for strong, long-track tornadoes, because there's just enough space for 2-3 discrete cells to form without being impeded by multicellular convective features.
 
That southern mississippi supercell with rotation, it's rotation keeps widening I'm guessing this one wants to be a wedge.
 
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