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Isolated hail and strong outflow winds may accompany thunderstorms across portions of the southern Plains late this afternoon into the early evening.
← back to overviewSPC AC 261615
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1115 AM CDT Sat Sep 26 2026
Valid 261630Z - 271200Z
THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON/EVENING FROM WESTERN OKLAHOMA INTO NORTHWEST TEXAS
### SUMMARY
Isolated hail and strong outflow winds may accompany thunderstorms across portions of the southern Plains late this afternoon into the early evening.
Synopsis
A midlevel shortwave trough over KS/OK will continue generally eastward through the larger-scale ridge and slowly weaken by tonight. Scattered convection and widespread clouds persist this morning from southwest OK into KS in the primary zone of ascent preceding the midlevel trough, though clearing from the west is expected this afternoon. Surface heating west of the clouds and within an axis of low-level moisture (boundary-layer dewpoints in the low-mid 60s) along a weak surface trough could support additional, surface-based thunderstorms this afternoon across western OK into northwest TX. Relatively deep mixing/inverted-V profiles appear to favor isolated strong outflow gusts as the primary hazard late this afternoon/evening. Vertical shear will be on the lower margins for supercells with marginally severe hail.
Elsewhere, occasional/mainly elevated thunderstorms will be possible through tonight from northeast OK northward to IA. Other isolated lightning flashes will remain possible through the day near the southeast New England coast with elevated convection atop a low-level warm advection regime.
..Thompson/Chalmers.. 09/26/2026
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z
Severe thunderstorms are not expected on Sunday.
← back to overviewSPC AC 261711
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1211 PM CDT Sat Sep 26 2026
Valid 271200Z - 281200Z
NO SEVERE THUNDERSTORM AREAS FORECAST
### SUMMARY
Severe thunderstorms are not expected on Sunday.
Synopsis
A broad western trough will evolve into an upper low in central California with another weaker shortwave trough within the northern Rockies into Monday morning. A modest surface trough will extend from parts of the northern High Plains into the southern High Plains. While some low-level moisture will be maintained within the High Plains on the western flank of a surface high, overall moisture quality/depth will be limited. Furthermore, increasing cloud cover across much of these regions will limit the degree of destabilization that will occur. Capping is likely to limit storm development during the afternoon in the northeast Wyoming/Black Hills vicinity where a stronger storm would be conditionally possible otherwise. Later in the evening, a strengthening low-level jet in the northern Plains will promote scattered storm development. Mid-level lapse rates could support small hail. A weak surface low in the southern High Plains could allow isolated storms to initiate where surface heating will be greater than farther north. Weak shear should limit any organization of that activity. Overall severe potential appears low across the CONUS.
..Wendt.. 09/26/2026
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z
Severe thunderstorms are not expected on Monday.
← back to overviewSPC AC 260716
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0216 AM CDT Sat Sep 26 2026
Valid 281200Z - 291200Z
NO SEVERE THUNDERSTORM AREAS FORECAST
### SUMMARY
Severe thunderstorms are not expected on Monday.
Synopsis
An upper low will gradually morph into an open wave while ejecting into the Atlantic from the Northeast and another upper trough traverses the Southwest on Monday. Weak surface lee troughing and associated low-level moisture return will continue over the Plains, supporting increased thunderstorm chances. Meanwhile, some cooling aloft and deep-layer ascent will encourage thunderstorm development ahead of the aforementioned upper trough over the Interior West. Nonetheless, the lack of a favorable overlap of buoyancy and shear will inhibit organized severe thunderstorm potential, as also suggested by the latest ML/AI calibrated guidance.
..Squitieri.. 09/26/2026
CLICK TO GET WUUS03 PTSDY3 PRODUCT
NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 1930Z
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:
If you bookmark this page, it will continue to update with each new outlook that is issued.
| Day 4 | Tuesday, September 29 | potential too low |
| Day 5 | Wednesday, September 30 | predictability too low |
| Day 6 | Thursday, October 1 | predictability too low |
| Day 7 | Friday, October 2 | potential too low |
| Day 8 | Saturday, October 3 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 261129 SPC AC 261129
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0629 AM CDT Sat Sep 26 2026
Valid 291200Z - 041200Z
DISCUSSION
An upper trough is poised to gradually track eastward across the Interior West and eject into the Plains states through next week. Surface low development is likely across the southern Plains sometime in the Days 5-6 (Wednesday-Thursday) time frame, when low-level moisture advection and accompanying buoyancy will appreciably increase. However, vertical wind shear is expected to be limited, so organized severe potential does not appear evident, though at least isolated severe is possible across the southern Plains around next Thursday. Thereafter, a cold front will progress southeastward across much of the CONUS, displacing buoyancy across much of the Plains and MS Valley, further limiting the severe threat.
..Squitieri.. 09/26/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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:
If you bookmark this page, it will continue to update with each new outlook that is issued.
| Day 4 | Tuesday, September 29 | potential too low |
| Day 5 | Wednesday, September 30 | predictability too low |
| Day 6 | Thursday, October 1 | predictability too low |
| Day 7 | Friday, October 2 | potential too low |
| Day 8 | Saturday, October 3 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 261129 SPC AC 261129
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0629 AM CDT Sat Sep 26 2026
Valid 291200Z - 041200Z
DISCUSSION
An upper trough is poised to gradually track eastward across the Interior West and eject into the Plains states through next week. Surface low development is likely across the southern Plains sometime in the Days 5-6 (Wednesday-Thursday) time frame, when low-level moisture advection and accompanying buoyancy will appreciably increase. However, vertical wind shear is expected to be limited, so organized severe potential does not appear evident, though at least isolated severe is possible across the southern Plains around next Thursday. Thereafter, a cold front will progress southeastward across much of the CONUS, displacing buoyancy across much of the Plains and MS Valley, further limiting the severe threat.
..Squitieri.. 09/26/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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:
If you bookmark this page, it will continue to update with each new outlook that is issued.
| Day 4 | Tuesday, September 29 | potential too low |
| Day 5 | Wednesday, September 30 | predictability too low |
| Day 6 | Thursday, October 1 | predictability too low |
| Day 7 | Friday, October 2 | potential too low |
| Day 8 | Saturday, October 3 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 261129 SPC AC 261129
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0629 AM CDT Sat Sep 26 2026
Valid 291200Z - 041200Z
DISCUSSION
An upper trough is poised to gradually track eastward across the Interior West and eject into the Plains states through next week. Surface low development is likely across the southern Plains sometime in the Days 5-6 (Wednesday-Thursday) time frame, when low-level moisture advection and accompanying buoyancy will appreciably increase. However, vertical wind shear is expected to be limited, so organized severe potential does not appear evident, though at least isolated severe is possible across the southern Plains around next Thursday. Thereafter, a cold front will progress southeastward across much of the CONUS, displacing buoyancy across much of the Plains and MS Valley, further limiting the severe threat.
..Squitieri.. 09/26/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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:
If you bookmark this page, it will continue to update with each new outlook that is issued.
| Day 4 | Tuesday, September 29 | potential too low |
| Day 5 | Wednesday, September 30 | predictability too low |
| Day 6 | Thursday, October 1 | predictability too low |
| Day 7 | Friday, October 2 | potential too low |
| Day 8 | Saturday, October 3 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 261129 SPC AC 261129
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0629 AM CDT Sat Sep 26 2026
Valid 291200Z - 041200Z
DISCUSSION
An upper trough is poised to gradually track eastward across the Interior West and eject into the Plains states through next week. Surface low development is likely across the southern Plains sometime in the Days 5-6 (Wednesday-Thursday) time frame, when low-level moisture advection and accompanying buoyancy will appreciably increase. However, vertical wind shear is expected to be limited, so organized severe potential does not appear evident, though at least isolated severe is possible across the southern Plains around next Thursday. Thereafter, a cold front will progress southeastward across much of the CONUS, displacing buoyancy across much of the Plains and MS Valley, further limiting the severe threat.
..Squitieri.. 09/26/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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:
If you bookmark this page, it will continue to update with each new outlook that is issued.
| Day 4 | Tuesday, September 29 | potential too low |
| Day 5 | Wednesday, September 30 | predictability too low |
| Day 6 | Thursday, October 1 | predictability too low |
| Day 7 | Friday, October 2 | potential too low |
| Day 8 | Saturday, October 3 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 261129 SPC AC 261129
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0629 AM CDT Sat Sep 26 2026
Valid 291200Z - 041200Z
DISCUSSION
An upper trough is poised to gradually track eastward across the Interior West and eject into the Plains states through next week. Surface low development is likely across the southern Plains sometime in the Days 5-6 (Wednesday-Thursday) time frame, when low-level moisture advection and accompanying buoyancy will appreciably increase. However, vertical wind shear is expected to be limited, so organized severe potential does not appear evident, though at least isolated severe is possible across the southern Plains around next Thursday. Thereafter, a cold front will progress southeastward across much of the CONUS, displacing buoyancy across much of the Plains and MS Valley, further limiting the severe threat.
..Squitieri.. 09/26/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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