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You are looking at an outlook that is part of the medium range forecast (the outlook for days 4-8). The most important thing to note is that lack of a risk does not mean zero risk. Generally speaking, confidence has to be pretty high for the Storm Prediction Center to have an outlook area this far into the future.
When no specific risk areas are shown, you might see one of these phrases:
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| Day 4 | Thursday, June 18 | 15% |
| Day 5 | Friday, June 19 | predictability too low |
| Day 6 | Saturday, June 20 | predictability too low |
| Day 7 | Sunday, June 21 | predictability too low |
| Day 8 | Monday, June 22 | predictability too low |
ZCZC SPCSWOD48 ALL ACUS48 KWNS 150757 SPC AC 150757
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0257 AM CDT Mon Jun 15 2026
Valid 181200Z - 231200Z
DISCUSSION
Day 4/Thursday – Mid-Atlantic/Northeast
Strong mid/upper level westerly flow will overspread portions of the Ohio Valley into the Northeast as a shortwave trough pivots across Quebec/Ontario and the Northeast U.S. on Thursday. Quite a bit of uncertainty exists regarding severe potential. Early day convection and cloud cover may limited destabilization from the Upper Ohio Valley into parts of the southern Mid-Atlantic and northeast. Additionally, stronger mid/upper level flow will become increasingly displaced to the north from richer boundary-layer moisture and stronger instability. Nevertheless, sufficient overlap of strong flow atop a moist airmass should occur from southern Ohio/eastern KY into the Mid-Atlantic, supporting a risk for severe thunderstorms on Thursday. This area will likely shift some in the coming days as mesoscale details become better resolved.
Days 5-8/Friday-Monday
A surface front will sag southward across the Gulf Coast states, with surface high pressure centered over the Mid-South vicinity on Friday. This should suppress the overall severe risk as richer boundary layer moisture remains confined to TX and the Gulf Coast. On Saturday, northward transport of Gulf moisture across the Plains is expected beneath a building upper ridge. By Sunday, an upper trough over the West may eject eastward into the Plains, resulting in some return of severe thunderstorm potential this weekend, though spread among forecast guidance is quite large and predictability is low late in the forecast period.
..Leitman.. 06/15/2026
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