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March 1-3, 2023 | Severe Weather Outbreak


ElectricStorm

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SPC dropped the 15% tornado area, which makes sense considering how quick this will probably go linear after the initial hail threat. Strong tornadoes still possible, just likely less of them than initially feared. 

That being said, serious hail risk for DFW, and wind threat further east, hopefully everyone is prepared. 

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  • The title was changed to March 1-3, 2023 | Severe Weather Outbreak

Tomorrow is looking more and more interesting by the model run in TN/KY. A lot of the models are showing a linear storm mode with big winds, but LR HRRR picking up on some discrete activity ahead of the front on the last several runs. FV3 shows it as well but it's pretty low resolution comparatively so hard to judge. Definitely will be keeping an eye what the models do as it gets a bit closer.

12Z HRRR

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C. KY

hrrr_2023030212_032_37.95--83.46.png

N. TN

hrrr_2023030212_032_36.51--84.45.png

New Day 2

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Quote
SPC AC 021734

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1134 AM CST Thu Mar 02 2023

   Valid 031200Z - 041200Z

   ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM MIDDLE
   TENNESSEE AND CENTRAL KENTUCKY...

   ...SUMMARY...
   Severe thunderstorms capable of damaging wind gusts and a few
   tornadoes will be possible on Friday across parts of the Southeast
   into the Tennessee and Ohio Valleys.

   ...Synopsis...
   A negatively tilted shortwave trough is forecast to extend from the
   AR/OK border into LA early Friday morning. This wave is expected to
   eject quickly northeastward throughout the day, reaching the lower
   OH Valley by Friday afternoon and the Upper Great Lakes by Saturday
   morning. Very strong mid to upper flow will accompany this system,
   with over 100 kt at 500-mb throughout its southern periphery. Strong
   mass response will also foster a strong and broad low-level jet,
   with a large area of 60+ kt at 850mb preceding the wave from the
   Southeast across the TN Valley into the Mid/Upper OH Valley. 

   A deepening surface low will move just ahead of this shortwave, as
   an attendant cold front sweeps eastward across the Southeast States
   and TN Valley. A broad warm sector characterized by 60s dewpoints
   will initially be in place ahead of this low and associated front.
   Severe thunderstorms are anticipated along this front as it moves
   eastward, with the highest severe potential anticipated from middle
   TN into central KY during the afternoon. 

   ...OH and TN Valleys...
   The surface low will likely be centered near southeast MO/northeast
   AR early Friday morning, before then moving quickly northeastward
   through the Lower OH Valley while occluding. This will lead to a
   narrowing of the warm sector with eastern extent. Even so, at least
   low 60s dewpoints are anticipated ahead of the low and attendant
   cold front from western TN/KY through middle TN and central KY.
   Heating ahead of the line will be modest, but some  limited buoyancy
   is still expected to develop, particularly during the afternoon
   across middle TN and central KY. Strong forcing for ascent is
   expected, with vigorous large-scale ascent augmented by ascent along
   the front and surface low. This buoyancy and ascent will be
   colocated with robust wind fields. These environmental conditions
   are expected to support thunderstorms capable of strong gusts, and
   potentially a few tornadoes. A linear mode looks most probable,
   although some guidance has begun to indicate the potential for a few
   discrete storms ahead of the line. As of now, the discrete scenario
   has not been given too much weight, due to limited surface-based
   potential ahead of the line. That being said, any discrete storms
   that mature would likely be supercellular.

   ...Southeast...
   Instability will be limited by warm temperatures aloft, with the
   main forcing for ascent displaced northwest of the region. Even so,
   robust wind fields and moderate low-level moisture are expected to
   support severe thunderstorms along a cold front moving quickly
   eastward across the region. Primary threat is damaging wind gusts,
   although a tornado or two is also possible.

   ..Mosier.. 03/02/2023

 

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1 hour ago, ClicheVortex2014 said:

Glad they dropped the 15% tornado. Early day stability is an issue and doesn’t seem like there’s much reason to expect warm sector/discrete activity right now. That said, the early day stability in NE TX appears to be moving out with an effective warm front pushing it out

You posted it in the wrong forum.

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14 minutes ago, ClicheVortex2014 said:

Another note here… gotta watch this “warm front” for enhanced tornado potential later if a cell can take advantage of it. Definitely have some backed surface winds in its vicinity.

Another post in the wrong forum...

 

Not trying to be rude or anything though, I will stop if you want me to.

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Just now, Neoncyclone said:

Models definitely didn't pick up on this much discrete warm-sector convection, which is why the 15% hatched was removed earlier today, yet here we are with from my count at least 6 maturing supercells.

 

Screenshot_20230302_165220_RadarScope.jpg

They're going to reinstate that, this took them by surprise.

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3 minutes ago, Iceresistance said:

They're going to reinstate that, this took them by surprise.

I doubt they re-upgrade unless it becomes apparent that every supercell is maturing well and taking full advantage of the environment, not saying they won't, but we'd have to see each of these cells really mature and have multiple start producing to see that happen. Regardless, dangerous evening ahead for arklatex!!

Edited by Neoncyclone
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