Severe Weather Outlook

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Outlook for Friday, July 17

Outlook Images

any severe predictability too low

Note on Medium Range Outlooks

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:

Predictability Too Low: This means that severe storms might be possible, but forecasters aren't confident enough about where or when they might occur. Think of it as the models showing different possibilities, like pieces of a puzzle that haven't come together yet.
Potential Too Low: This means forecasters are fairly confident that widespread severe weather is NOT expected on that day. While isolated storms might still occur, the chance of reaching severe criteria across any given area is very low.

If you bookmark this page, it will continue to update with each new outlook that is issued.

Days Covered in this Outlook

Day 4	Monday, July 13	predictability too low
Day 5	Tuesday, July 14	15%
Day 6	Wednesday, July 15	predictability too low
Day 7	Thursday, July 16	predictability too low
Day 8	Friday, July 17	predictability too low

Detailed Outlook

ZCZC SPCSWOD48 ALL ACUS48 KWNS 100859 SPC AC 100859

Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0359 AM CDT Fri Jul 10 2026

Valid 131200Z - 181200Z

DISCUSSION

Ensemble guidance continues to indicate that the western US mid-level ridge will build into the north-central US during the first part of the forecast period. Toward the middle and end of the week, this ridge should retrograde westward as a series of mid-level troughs move across the apex of the ridge in central Canada. One particularly strong trough will impact New England on Tuesday into Wednesday.

### Tuesday/Day 5

GEFS and EPS ensemble guidance is in remarkably good agreement that a strong short-wave trough will approach New England during the day on Tuesday and move across the region Tuesday night. Ahead of this trough, both ensemble systems have mean surface temperatures in the 70Fs and 80Fs with surface dewpoints in the mid-to-upper-60Fs across much of the area. The result will be MUCAPE values in the 1000-2000 J/kg range amidst seasonably strong vertical shear. Supporting this are ensemble probabilities greater than 50 percent for the supercell composite index to be greater than 1.

As the trough approaches New England, the expectation is for one or more clusters of storms to develop during the afternoon across portions of Quebec and move into and then across New England during the late afternoon into evening/overnight hours. Although there is some spread within the ensemble regarding the timing of the wave moving across the area, with solutions ranging from afternoon to overnight, the overall environment should remain favorable for damaging thunderstorm winds to occur, even into the early overnight hours.

### Friday/Day 8

Ensemble guidance is beginning to suggest some severe potential across portions of the Ohio Valley into the Mid-Atlantic region. This area is forecast to be on the eastern periphery of the strong western US ridge and near the basal region of a long-wave trough across eastern Canada and New England. Surface temperatures are expected to range from the upper-80Fs to mid-90Fs with surface dewpoint temperatures in the 60Fs. Parcel trajectories around the western ridge do not favor much in the way of an elevated mixed layer, so scattered thunderstorm development is likely. The magnitude of the severe potential will likely rest on the strength of the deep-layer shear and the number of storms.

..Marsh.. 07/10/2026

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National Risk Overview

Friday, July 10: TORNADO: low; HAIL: 15%; WIND: 15%
Saturday, July 11: TORNADO: low; HAIL: 5%; WIND: 15%
Sunday, July 12: ANY SEVERE: 5%
Monday, July 13: ANY SEVERE: predictability too low
Tuesday, July 14: ANY SEVERE: 15%
Wednesday, July 15: ANY SEVERE: predictability too low
Thursday, July 16: ANY SEVERE: predictability too low
Friday, July 17: ANY SEVERE: predictability too low

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