TZUTC: 0000
MSGID: 168269.weather@1:2320/105 2dc35102
PID: Synchronet 3.21a-Linux master/123f2d28a Jul 12 2025 GCC 12.2.0
TID: SBBSecho 3.28-Linux master/123f2d28a Jul 12 2025 GCC 12.2.0
BBSID: CAPCITY2
CHRS: ASCII 1
FORMAT: flowed
ACUS48 KWNS 050951
SWOD48
SPC AC 050949

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0349 AM CST Mon Jan 05 2026

Valid 081200Z - 131200Z

...DISCUSSION...
The noticeable model differences on D3/Wednesday in the evolution of
a low-latitude shortwave impulse, ejecting ahead of an amplifying
upper trough over the West, persist into D4/Thursday. This renders
low confidence in a greater than low-probability severe risk on
Thursday, which appears roughly centered on the Ark-La-Tex to
Mid-South.

Peak severe potential still appears centered on D5/Friday.
Predictability remains sub-optimal with the basal portion of the
amplified upper trough from the Southwest. This renders large spread
across guidance in timing and amplitude of downstream cyclogenesis
from the south-central Great Plains towards the Great Lakes,
impacting the breadth of severe potential. However, with preceding
days of airmass modification from the western Gulf, a pronounced
wintertime warm-moist sector should become established towards the
Lower OH Valley vicinity. This should be coincident with a broad
swath of strong southwesterly mid-level flow that should be
strengthening during the period.

The trio of latest NCAR ECENS-based and SPC-CSU GEFS-based ML
probabilities have trended upward again with similarly large 15
percent regions. Meanwhile, the NSSL GEFS-based V1.2 has increased
back to a 10 percent, but displaced farther south. For this
forecast, have opted to include a 15 percent highlight, centered on
the Lower MS to Lower OH Valleys where confidence is greater for a
favorable convective environment on Friday afternoon to night
despite the modest synoptic-scale predictability.

ML probs for D6/Saturday remain low, with only the NCAR_Pangu
highlighting a 5 percent area. But given the aforementioned timing
differences with the evolution of the upper trough/surface
cyclogenesis, very fast deep-layer wind fields could persist atop a
more limited thermodynamic environment. A conditional convective
damaging wind threat seems apparent, with low confidence on spatial
extent/amplitude at this time range.

..Grams.. 01/05/2026

= = =
To unsubscribe from WX-STORM and you already have a login, go to
https://lists.illinois.edu and use the "Unsubscribe" link.  Otherwise email
Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

--- SBBSecho 3.28-Linux
 * Origin: Capitol City Online (1:2320/105)
SEEN-BY: 19/10 104/119 105/81 106/201 114/10 120/302 128/187 129/14
SEEN-BY: 153/757 7715 154/10 30 50 110 700 218/700 840 220/10 20 30
SEEN-BY: 220/70 90 221/1 6 360 226/17 18 30 44 50 227/114 229/110
SEEN-BY: 229/134 206 275 300 307 317 400 426 428 470 664 700 705 266/512
SEEN-BY: 267/800 291/111 301/1 320/219 322/757 335/364 341/66 342/200
SEEN-BY: 396/45 460/58 633/280 712/848 770/1 100 340 350 772/210 220
SEEN-BY: 772/230 902/26 2320/0 105 304 3634/12 5020/400 5075/35
PATH: 2320/105 154/10 221/6 218/840 770/1 633/280 229/426