648
ACUS11 KWNS 280434
SWOMCD
SPC MCD 280433 COR
OKZ000-280545-

Mesoscale Discussion 0555
NWS Storm Prediction Center Norman OK
1133 PM CDT Sat Apr 27 2024

Areas affected...Eastern Oklahoma

Concerning...Tornado Watch 152...

Valid 280433Z - 280545Z

CORRECTED FOR AREA OUTLINE

The severe weather threat for Tornado Watch 152 continues.

SUMMARY...Tornado potential is greatest across eastern Oklahoma.

DISCUSSION...Influence of mid-level speed max appears to be
affecting convection over central/southern Oklahoma. Low-level SRH
has increased markedly across eastern OK this evening as LLJ is
focused into this region of the southern Plains. 0-1 SRH values are
currently around 600 m2/s2 at INX, and weak inhibition that was
observed on 00z OUN sounding is now negligible.

Late-afternoon convection that evolved over northwest TX/southwest
OK has grown upscale and progressed downstream. Leading edge of
well-defined MCS now arcs from near Payne-Okfuskee-Garvin County.
While embedded circulations are noted along this line, especially
the northern portions, of more concern are the discrete supercells
that have developed ahead of the MCS. Several notable, long-lived
supercells have evolved from south-central OK into Hughes County.
Tornado potential appears significant with these discrete pre-MCS
updrafts. As these updrafts are overtaken by the MCS a more complex
MCS will ultimately evolve within the larger warm advection
corridor. A few strong tornadoes are likely with this activity.

..Darrow.. 04/28/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...TSA...OUN...

LAT...LON   35459666 36339693 36929563 36479472 35669520 34019600
            34149719 35459666