693
ACUS11 KWNS 232146
SWOMCD
SPC MCD 232145
ALZ000-MSZ000-LAZ000-ARZ000-232245-
MESOSCALE DISCUSSION 0255
NWS STORM PREDICTION CENTER NORMAN OK
0445 PM CDT SUN MAR 23 2025
AREAS AFFECTED...PORTIONS OF THE LOWER MS VALLEY INTO NORTHWEST AL
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 232145Z - 232245Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...SCATTERED THUNDERSTORMS CAPABLE OF HAIL AND DAMAGING GUSTS
ARE BECOMING MORE LIKELY THIS AFTERNOON/EVENING. A FEW SUPERCELLS
MAY ALSO FAVOR SOME TORNADO A RISK. A WW IS LIKELY NEEDED.
DISCUSSION...AS OF 2140 UTC, REGIONAL VISIBLE AND RADAR IMAGERY
SHOWED INITIAL CONVECTIVE UPDRAFTS WERE STEADILY DEEPENING OVER
PARTS OF THE LOWER MS VALLEY AHEAD OF A SLOW MOVING COLD FRONT.
ONGOING WITHIN A BROAD AND WEAKLY FORCED WARM AIR ADVECTION REGIME,
SCATTERED THUNDERSTORM DEVELOPMENT APPEARS LIKELY OVER THE NEXT
COUPLE OF HOURS. SURFACE TEMPERATURES IN THE LOW 80S AND DEWPOINTS
IN THE LOW TO MIDDLE 60S F ARE SUPPORTING 2000-2500 J/KG OF MLCAPE
WITH RELATIVELY STEEP LOW AND MID-LEVEL LAPSE RATES. DEEP-LAYER
SHEAR AROUND 35-40 KT WILL GRADUALLY STRENGTHEN ALONG WITH THE
LOW-LEVEL JET THIS EVENING. THIS WILL FAVOR A MIXED CONVECTIVE MODE
WITH BOWING SEGMENTS AND FEW SUPERCELLS LIKELY.
LARGE HAIL AND DAMAGING WINDS APPEAR TO BE THE MOST RELEVANT THREATS
INITIALLY GIVEN THE STEEP LAPSE RATES AND FAIRLY LARGE BUOYANCY.
SOME TORNADO RISK MAY EVOLVE IF MORE DOMINANT SUPERCELLS OR BOWING
SEGMENTS EMERGE WITH SLIGHTLY STRONGER LOW-LEVEL SHEAR THIS EVENING.
STORMS MAY EVENTUALLY MERGE WITH ADDITIONAL CONNECTION DEVELOPING
CLOSER TO THE FRONT, AS INDICATED BY SOME HI-RES GUIDANCE. THIS
WOULD FAVOR A GREATER RISK FOR DAMAGING WINDS OR A BRIEF TORNADO AS
A LOOSE LINE OR CLUSTER DEVELOPS WITH EASTWARD EXTENT. GIVEN THE
STEADY INCREASE IN CONVECTION AND THE POTENTIAL FOR SEVERE WIND AND
HAIL, A WATCH APPEARS LIKELY SOON.
..LYONS/GLEASON.. 03/23/2025
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...BMX...HUN...MEG...JAN...
LAT...LON 31619018 31759128 32209182 32599187 33029183 33759079
34208919 34728777 34608751 33108801 32028922 31768985
31619018
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