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Isolated hail and strong outflow winds may accompany thunderstorms across portions of the southern Plains today.
← back to overviewSPC AC 260600
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0100 AM CDT Sat Sep 26 2026
Valid 261200Z - 271200Z
THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS PORTIONS OF WESTERN OKLAHOMA AND NORTHWEST TEXAS
### SUMMARY
Isolated hail and strong outflow winds may accompany thunderstorms across portions of the southern Plains today.
Synopsis
A series of three mid-level troughs will impact portions of the CONUS today. The easternmost trough is an occluding low off the Northeast coast that will bring gusty winds and a threat of isolated thunderstorms to portions of southern New England within the associated surface cyclone’s warm conveyor belt. The westernmost trough will lift northward from portions of the interior Pacific Northwest and northern Rockies into western Canada, resulting in breezy conditions in its wake.
The third trough, and associated moisture plume, will lift northeast across the central CONUS today. As it does, overnight/morning convection will slowly move east across portions of Oklahoma and Kansas before weakening during the late morning. In the wake of this convection, strong diurnal heating should promote a well-mixed boundary layer. Additionally, sufficient low-level convergence along a residual surface trough stretching from northwest Texas into central Kansas should yield at least scattered surface-based thunderstorms. Steep low-level lapse rates will support strong, gusty thunderstorm outflows. Additionally, cloud-layer shear may be sufficient to support an isolated large hail threat with the strongest thunderstorm cores.
..Marsh/Weinman.. 09/26/2026
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
Severe thunderstorms are not expected tomorrow (Sunday).
← back to overviewSPC AC 260547
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1247 AM CDT Sat Sep 26 2026
Valid 271200Z - 281200Z
NO SEVERE THUNDERSTORM AREAS FORECAST
### SUMMARY
Severe thunderstorms are not expected tomorrow (Sunday).
Synopsis
An upper low will meander over the lower Hudson Valley and upper ridging will prevail over the Plains as an upper trough impinges on the West Coast tomorrow (Sunday). A surface low will develop over the Great Basin ahead of the approaching upper trough, with a weak surface low over northwestern TX encouraging low-level moisture advection across the Plains, with isolated to widely scattered thunderstorms expected across both regimes. Deterministic guidance consensus shows a general lack of overlapping buoyancy and vertical wind shear over the Great Basin to the Plains states, suggesting that severe potential should be quite limited, as also shown by the latest ML/AI guidance consensus.
..Squitieri.. 09/26/2026
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 1730Z
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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