905
ACUS02 KWNS 020601
SWODY2
SPC AC 020600

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
0100 AM CDT Wed Apr 02 2025

Valid 031200Z - 041200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE SOUTHERN
PLAINS TO THE MID MS/OH VALLEYS...AND INTO THE MID ATLANTIC...

...SUMMARY...
Several clusters of strong to severe storms are expected along a
broad frontal zone from the Southern Plains, Mid Mississippi Valley
to the Ohio/Tennessee Valleys and the Mid Atlantic. Damaging gusts
and hail are the primary risks, though a few tornadoes are possible.

...Synopsis...
A stalled front will provide the main impetus for severe storm
development from the ArkLaTex to the Mid Atlantic Thursday and
Thursday night. Broad troughing over the central US will gradually
amplify as strong flow aloft overspreads the frontal zone. Deep
moisture and seasonably warm temperatures along and south of the
elongated frontal zone will support the potential for strong to
severe storms over a large area.

...ArkLaTex to the MS/TN Valleys...
Elevated storms are likely to be ongoing near the stalled front
early in the period across parts of the Red River and ArkLaTex
vicinity. Flow aloft will turn more southerly, aiding in increasing
low-level warm advection through the day despite relatively neutral
mid-level height tendency. With surface dewpoints in the upper 60s
to low 70s F, moderate buoyancy is likely with only partial diurnal
heating. This should sustain the early storms, allowing them to
spread east, and potentially become surface based over parts of the
MS/TN Valleys. Effective shear of 55+ kt will favor a mix of
supercells and bowing segments capable of damaging gusts and a few
tornadoes.

Additional storms are likely along the dryline over northeast TX and
within the warm sector across parts of southern AR and northern LA
by mid afternoon. Deep veering wind profiles suggests these storms
will likely be supercellular, though the weak capping will favor
multiple interactions and relatively quick upscale growth into one
or more clusters with time. Until then, strong low/mid-level shear,
steep mid-level lapse rates and strong instability will support a
risk for all hazards.

With multiple rounds of convection likely to pass through the area,
confidence in the placement of the front is low. Some consideration
was given to higher probabilities across parts of northeast TX,
southern AR and northern LA, given the potential for several
supercells or a well organized bowing segment.

Another round of elevated storms is likely late Thursday into early
Friday as the flow aloft becomes increasingly meridional over the
southern Plains. Strong low-level warm advection and steep mid-level
lapse rates will support a risk for large hail as storms overrun the
stalled front across central and northwest TX, into southern OK
overnight.

...OH Valley into the Mid Atlantic...
Complications abound from overnight convection likely persisting
into the daylight hours across the OH Valley. The front is forecast
to continue to sag south and stall eventually across the OH Valley
and Mid Atlantic by midday Thursday. South of the boundary low 60s F
surface dewpoints and some filtered diurnal heating should support
around 1000 J/kg of MLCAPE. Several embedded mid-level perturbations
may provide enough ascent for additional convective development
through the day.  Vertical shear will remain strong as increasingly
zonal winds aloft overspread the frontal zone. Several clusters of
strong to severe storms are possible along the front with a risk
primarily for damaging winds and tornado or two, given the
relatively poor mid-level lapse rates and veered low-level flow.

..Lyons.. 04/02/2025

$$