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| Day 4 | Tuesday, April 28 | 15% |
| Day 5 | Wednesday, April 29 | predictability too low |
| Day 6 | Thursday, April 30 | predictability too low |
| Day 7 | Friday, May 1 | predictability too low |
| Day 8 | Saturday, May 2 | predictability too low |
ZCZC SPCSWOD48 ALL ACUS48 KWNS 250855 SPC AC 250855
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0355 AM CDT Sat Apr 25 2026
Valid 281200Z - 031200Z
DISCUSSION
In the wake of a significant surface cyclone, which may be in the process of migrating northeast of the upper Great Lakes region by 12Z Tuesday, it appears that a cold front will gradually advance across the Atlantic Seaboard and into the Gulf coast vicinity before stalling later this work week into next weekend. It appears that this will occur coincident with the southwestward suppression of subtropical ridging, initially centered over southern Mexico and influential as far north as the Gulf coast at the outset of this period.
Near the southern periphery of the westerlies/northern periphery of the subtropical ridging, there appears a similar signal in both ECENS and GEFS related medium-range guidance concerning potential for organized severe thunderstorm development by late Tuesday afternoon into Tuesday evening. An evolving pre-frontal corridor of moderate to strong potential instability across the Ark-La-Tex through Ark-La-Miss vicinity may provide a focus for an upscale growing thunderstorm cluster, aided by forcing for ascent and shear associated with a mid-level speed maximum progressing across the region.
Through the remainder of the week, into early next weekend, the lingering frontal zone across the Gulf coast region may provide a focus for occasional continuing thunderstorm development, particularly as an initially notable short wave perturbation, emerging from the southern mid-/subtropical latitudes of the eastern Pacific, progresses east of the southern Rockies. However, barring more substantive frontal wave development than currently forecast, potential for organized severe convection remains unclear.
..Kerr.. 04/25/2026
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