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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 | Friday, April 11 | predictability too low |
Day 5 | Saturday, April 12 | potential too low |
Day 6 | Sunday, April 13 | predictability too low |
Day 7 | Monday, April 14 | predictability too low |
Day 8 | Tuesday, April 15 | predictability too low |
ZCZC SPCSWOD48 ALL ACUS48 KWNS 080837 SPC AC 080837
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0337 AM CDT Tue Apr 08 2025
Valid 111200Z - 161200Z
DISCUSSION
On Day 4/Friday, an amplified large-scale trough will move slowly eastward across the Appalachians. Ahead of a related surface low in the lee of the Appalachians, weakly modified boundary-layer moisture will be in place across the coastal Mid-Atlantic states. While instability will be marginal, owing to the limited moisture and poor lapse rates, strong south-southwesterly midlevel flow may support a couple strong storms during the afternoon. The overall severe threat appears too marginal for severe probabilities at this time.
By Day 6/Sunday, a midlevel trough will advance eastward across the northern/central Plains, while an elongated downstream surface trough (with embedded surface lows) promotes partially modified Gulf moisture return across the southern/central Plains and MS Valley. Despite multiple surface boundaries across the Plains, current indications are that a strong EML and related capping atop the limited boundary-layer moisture should inhibit surface-based thunderstorm potential.
Thereafter, medium-range guidance varies considerably regarding the timing and evolution of the aforementioned midlevel trough and associated warm sector – limiting confidence in severe-storm potential for Days 7-8/Monday-Tuesday.
..Weinman.. 04/08/2025
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