SPC Day 4-8 Discussion: "After a lull in precipitation potential around Days 5-6/Mon-Tue,
thunderstorm potential may increase late in the forecast period. An
upper ridge over the western U.S. will shift east across the Plains
on Day 7/Wed before a deepening trough ejects across the Rockies to
the MS Valley on Day 8/Thu. During this time, lee low development
over the southern Plains will result in strengthening southerly
low-level flow over the western Gulf. Increasing moisture return
ahead of the eastward developing low and attendant cold front will
likely result in thunderstorm development from the ArkLaTex to the
Mid-South vicinity on Day 8/Thu. While some severe potential could
become favorable in this pattern, uncertainty regarding northward
extent of moisture return, and timing of key features at this longer
time range, precludes severe probabilities at this time."