spc ac 130716
day 3 convective outlook
nws storm prediction center norman ok
0216 am cdt mon apr 13 2026
valid 151200z - 161200z
...there is a slight risk of severe thunderstorms across portion of
the southern plains into southern wisconsin...
...summary...
severe thunderstorms posing a risk for large hail and strong wind
gusts will be possible across portions of the southern plains toward
the great lakes on wednesday afternoon and evening.
...southern plains to great lakes...
an upper trough will move from the plains to the ms valley vicinity
on wednesday. as associated corridor of enhanced southwesterly
deep-layer flow will overspread a moist/unstable airmass ahead of a
surface dryline. the southern plains portion of the dryline will not
move too much on wednesday. however, the northern extent of this
boundary will intersect a weak surface low moving from the lower mo
valley toward lake michigan. this portion of the boundary will
advance eastward toward the ms river during the evening/overnight
hours.
areas of showers and thunderstorms may be ongoing across portions of
the region wednesday morning. as a result, there is uncertainty
regarding how the boundary layer may recover/destabilize during the
afternoon. nevertheless, at least pockets of moderate
destabilization (1000-2000 j/kg mlcape) are expected within a
corridor along and east of the surface boundary. effective shear
magnitudes greater than 40 kt will be sufficient for organized
convection, with large hail and strong wind gusts being the primary
hazards.
..leitman.. 04/13/2026
click to get wuus03 ptsdy3 product
note: the next day 3 outlook is scheduled by 1930z