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Scattered severe storms capable of large hail and severe gusts are expected this evening into tonight over parts of the central and southern Plains into the Lower Missouri Valley. Isolated large hail may also occur in the southern Great Lakes.
← back to overviewSPC AC 140100
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0800 PM CDT Tue Oct 13 2026
Valid 140100Z - 141200Z
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHERN AND CENTRAL PLAINS INTO THE LOWER MISSOURI VALLEY
### SUMMARY
Scattered severe storms capable of large hail and severe gusts are expected this evening into tonight over parts of the central and southern Plains into the Lower Missouri Valley. Isolated large hail may also occur in the southern Great Lakes.
Southern and Central Plains
The latest water vapor imagery shows an anticyclonic flow pattern in place over the eastern two-thirds of the nation, with southwesterly mid-level flow from the Desert Southwest into the southern and central Plains. At the surface, a cold front is located from near the Oklahoma Panhandle northeastward into north-central Missouri. A 1007 mb low is analyzed over the northeastern Texas Panhandle. Low-convergence is maximized along the front over the central Plains, where scattered thunderstorms are ongoing. The convergence axis extends southward into the Low Rolling Plains of northwest Texas, where a cluster of storms is also ongoing. Ahead of the convergence axis, surface dewpoints are in upper 60s and lower 70s F over much of the southern and central Plains, which is contributing to moderate instability, with the RAP estimating MLCAPE mostly in the 2000 to 2500 J/kg range.
In addition to the instability,the WSR-88D VWP at Wichita, KS has 0-6 km shear near 35 knots with 40 to 45 knots of southwesterly flow in the mid-levels. Some directional shear is present in the boundary layer. This environment will support a threat for supercells with cells that remain discrete. Supercells will be capable of large hail, severe wind gusts and perhaps a tornado or two. Severe wind gusts are expected to become the primary severe threat as the primary mode becomes linear, later this evening.
Further south into western Oklahoma and northwest Texas, the latest WSR-88D VWP at Frederick has about 35 knots of 0-6 km shear. The RAP also has steep mid-level lapse rates in the 7 to 7.5 C/km range. This should support supercells with a potential for large hail and severe wind gusts.
Southern Great Lakes
A minor shortwave trough appears to be moving into the western Great Lakes early this evening. Ahead of this feature, thunderstorms have developed over far southern Wisconsin. The storms will track east-southeastward into the southern Great Lakes this evening into the overnight. The RAP currently shows an axis of instability analyzed from western Illinois northeastward into the southwestern Great Lakes. Along and near this axis, RAP forecast soundings late this evening have MUCAPE around 1500 J/kg with effective shear near 40 knots. This may be enough for an isolated large hail threat, with the stronger elevated storms.
..Broyles.. 10/14/2026
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z
Severe thunderstorms capable of mainly damaging wind gusts, isolated hail and a tornado or two are possible across portions of the southern Plains into the Ozark Plateau, and in the parts of the upper Ohio Valley and Mid-Atlantic Wednesday afternoon and evening.
← back to overviewSPC AC 131730
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1230 PM CDT Tue Oct 13 2026
Valid 141200Z - 151200Z
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM WESTERN NORTH TEXAS…ACROSS OKLAHOMA…TO THE WESTERN OZARK PLATEAU
### SUMMARY
Severe thunderstorms capable of mainly damaging wind gusts, isolated hail and a tornado or two are possible across portions of the southern Plains into the Ozark Plateau, and in the parts of the upper Ohio Valley and Mid-Atlantic Wednesday afternoon and evening.
Southern Plains to the Ozarks
An upper low, initially over the Four Corners, is forecast move eastward over the High Plains while southwesterly flow aloft increases. A series of convectively enhanced vorticity maxima will move along a cold front through the Mid-Atlantic, OH and mid-MS Valleys, and into portions of the southern Plains. Western portions of the front, modified by convection, may eventually stall and perhaps retreat north Wed night in response to falling pressures with a deepening lee low over eastern CO and the central Plains.
Scattered to numerous thunderstorms, in one or more clusters, are likely to be ongoing from the mid MS valley into southern/eastern KS and central OK at 12z Wed. The cold front will likely be reinforced by the convection with the morning outflow potentially causing it to sag slowly across central OK and the western Ozarks Plateau through the day. To the south of the boundary, the air mass should remain very moist (70s F dewpoints), with modest heating contributing to weak to moderate diurnal destabilization. Large-scale ascent will gradually increase as the upper low approaches, aiding in thunderstorm redevelopment along the dryline across the TX Panhandle/western OK, and within the broader warm sector by early afternoon. Increasing deep-layer shear (40-50 kt) will be supportive of a mix of organized supercells and lines/clusters. Damaging winds are the most likely threat given modest low/mid-level lapse rates and a mixed convective mode. However, isolated hail and perhaps a tornado, are also possible with any more persistent supercells.
As the main upper low moves eastward into the evening/overnight, the stalled surface front may gradually return northward as a warm front across OK and KS. The air mass will remain very moist, aided by further moisture advection associated with a developing 30-40 kt low-level jet. As low-level warm air advection increases near the boundary, storm redevelopment is possible through the evening/overnight. Expanding low-level hodographs (ESRH 150-200 m2/s2) and the very moist PBL could support a tornado or two with any supercells or linear clusters able to develop near the surface low and warm front into early Thursday.
OH Valley to the Mid Atlantic
Daytime heating combined with boundary-layer dewpoints in the mid 60s to low 70s F is expected to contribute to pockets of moderate instability with MLCAPE near 1000 J/kg by mid-late afternoon ahead of the cold front. Thunderstorms ongoing over the mid MS valley, and additional development from the aforementioned vorticity maxima, are expected to increase in areal coverage along the front through the afternoon. Steepening low-level lapse rates coupled with strengthening west-southwesterly winds with height (yielding up to 35-40 kt of deep-layer shear) appear supportive of isolated damaging wind gusts into evening.
..Lyons.. 10/13/2026
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z
Isolated severe storms are possible over portions of the mid- Mississippi Valley and Midwest Thursday afternoon and evening.
← back to overviewSPC AC 131930
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Tue Oct 13 2026
Valid 151200Z - 161200Z
THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE MID MISSISSIPPI VALLEY AND MIDWEST
### SUMMARY
Isolated severe storms are possible over portions of the mid- Mississippi Valley and Midwest Thursday afternoon and evening.
Mid MS Valley/Midwest
The upper low ejecting over the central Plains is forecast to weaken to a positive-tilt open wave as it continues eastward and merges with a northern stream trough from southern Canada late Thursday. The lee low over KS will continue eastward and strengthen as a diffuse warm front lifts northward across the Mid MS and lower OH Valleys. A cold front will trail the low, sweeping south and east from the MO valley into the southern Plains.
Scattered to numerous thunderstorms are expected to be ongoing early Thursday ahead of the low within a zone of low-level warm air advection from the central Plains into the mid-MS Valley. A narrow plume of upper 60s to low 70s F dewpoints will be advected northeastward ahead of this activity across eastern IA/MO into western IL. Modest clearing/heating of the air mass should support weak destabilization with MLCAPE of 500-750 J/kg. This will allow for intensification of the storms/new development through the afternoon. Increasing ascent/vertical shear (EBWD 45-60 kt) will support the potential for one or more organized clusters of storms capable of damaging wind gusts through Thursday evening.
Farther southwest across OK/TX, a broken band of showers and storms may still be ongoing ahead of the surging cold front Thursday morning. Low-level flow should quickly veer as the front accelerates favoring undercutting. Poor lapse rates, multiple rounds of prior precipitation and rapidly decreasing surface moisture suggest only weak buoyancy will be present. This should limit severe potential, though a stray severe gust cannot be completely ruled out.
..Lyons.. 10/13/2026
CLICK TO GET WUUS03 PTSDY3 PRODUCT
NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z
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 | Friday, October 16 | predictability too low |
| Day 5 | Saturday, October 17 | potential too low |
| Day 6 | Sunday, October 18 | potential too low |
| Day 7 | Monday, October 19 | potential too low |
| Day 8 | Tuesday, October 20 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 130830 SPC AC 130830
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0330 AM CDT Tue Oct 13 2026
Valid 161200Z - 211200Z
DISCUSSION
Day 4/Friday
An intense midlevel trough will progress from the Great Lakes to off the Atlantic Coast by Saturday morning. An associated surface low is forecast to develop from the lower Great Lakes to off the New England coast while a trailing cold front advances through much of the eastern CONUS. A moist and at least marginally unstable air mass is forecast in portions of the Mid-Atlantic by afternoon, with thunderstorms possible along and ahead of the front. Vertical shear is expected to be relatively strong, suggesting the potential for isolated severe weather. Level-1/Marginal Risk probabilities may be required in the subsequent Day 3 Outlook for this time period.
### Days 5 through 8/Saturday through Tuesday
A considerably drier and more stable low-level air mass will persist at many locations over the weekend with non-severe storms possible in portions of FL and the lower-CO Valley. By early next week, there is good model agreement that a midlevel trough will move into the western CONUS. In response, a deepening lee trough over the High Plains will lead to increasing moisture return, particularly over the southern Plains by Tuesday. However, no severe weather is expected through that time frame.
..Mead.. 10/13/2026
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 | Friday, October 16 | predictability too low |
| Day 5 | Saturday, October 17 | potential too low |
| Day 6 | Sunday, October 18 | potential too low |
| Day 7 | Monday, October 19 | potential too low |
| Day 8 | Tuesday, October 20 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 130830 SPC AC 130830
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0330 AM CDT Tue Oct 13 2026
Valid 161200Z - 211200Z
DISCUSSION
Day 4/Friday
An intense midlevel trough will progress from the Great Lakes to off the Atlantic Coast by Saturday morning. An associated surface low is forecast to develop from the lower Great Lakes to off the New England coast while a trailing cold front advances through much of the eastern CONUS. A moist and at least marginally unstable air mass is forecast in portions of the Mid-Atlantic by afternoon, with thunderstorms possible along and ahead of the front. Vertical shear is expected to be relatively strong, suggesting the potential for isolated severe weather. Level-1/Marginal Risk probabilities may be required in the subsequent Day 3 Outlook for this time period.
### Days 5 through 8/Saturday through Tuesday
A considerably drier and more stable low-level air mass will persist at many locations over the weekend with non-severe storms possible in portions of FL and the lower-CO Valley. By early next week, there is good model agreement that a midlevel trough will move into the western CONUS. In response, a deepening lee trough over the High Plains will lead to increasing moisture return, particularly over the southern Plains by Tuesday. However, no severe weather is expected through that time frame.
..Mead.. 10/13/2026
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 | Friday, October 16 | predictability too low |
| Day 5 | Saturday, October 17 | potential too low |
| Day 6 | Sunday, October 18 | potential too low |
| Day 7 | Monday, October 19 | potential too low |
| Day 8 | Tuesday, October 20 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 130830 SPC AC 130830
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0330 AM CDT Tue Oct 13 2026
Valid 161200Z - 211200Z
DISCUSSION
Day 4/Friday
An intense midlevel trough will progress from the Great Lakes to off the Atlantic Coast by Saturday morning. An associated surface low is forecast to develop from the lower Great Lakes to off the New England coast while a trailing cold front advances through much of the eastern CONUS. A moist and at least marginally unstable air mass is forecast in portions of the Mid-Atlantic by afternoon, with thunderstorms possible along and ahead of the front. Vertical shear is expected to be relatively strong, suggesting the potential for isolated severe weather. Level-1/Marginal Risk probabilities may be required in the subsequent Day 3 Outlook for this time period.
### Days 5 through 8/Saturday through Tuesday
A considerably drier and more stable low-level air mass will persist at many locations over the weekend with non-severe storms possible in portions of FL and the lower-CO Valley. By early next week, there is good model agreement that a midlevel trough will move into the western CONUS. In response, a deepening lee trough over the High Plains will lead to increasing moisture return, particularly over the southern Plains by Tuesday. However, no severe weather is expected through that time frame.
..Mead.. 10/13/2026
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 | Friday, October 16 | predictability too low |
| Day 5 | Saturday, October 17 | potential too low |
| Day 6 | Sunday, October 18 | potential too low |
| Day 7 | Monday, October 19 | potential too low |
| Day 8 | Tuesday, October 20 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 130830 SPC AC 130830
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0330 AM CDT Tue Oct 13 2026
Valid 161200Z - 211200Z
DISCUSSION
Day 4/Friday
An intense midlevel trough will progress from the Great Lakes to off the Atlantic Coast by Saturday morning. An associated surface low is forecast to develop from the lower Great Lakes to off the New England coast while a trailing cold front advances through much of the eastern CONUS. A moist and at least marginally unstable air mass is forecast in portions of the Mid-Atlantic by afternoon, with thunderstorms possible along and ahead of the front. Vertical shear is expected to be relatively strong, suggesting the potential for isolated severe weather. Level-1/Marginal Risk probabilities may be required in the subsequent Day 3 Outlook for this time period.
### Days 5 through 8/Saturday through Tuesday
A considerably drier and more stable low-level air mass will persist at many locations over the weekend with non-severe storms possible in portions of FL and the lower-CO Valley. By early next week, there is good model agreement that a midlevel trough will move into the western CONUS. In response, a deepening lee trough over the High Plains will lead to increasing moisture return, particularly over the southern Plains by Tuesday. However, no severe weather is expected through that time frame.
..Mead.. 10/13/2026
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 | Friday, October 16 | predictability too low |
| Day 5 | Saturday, October 17 | potential too low |
| Day 6 | Sunday, October 18 | potential too low |
| Day 7 | Monday, October 19 | potential too low |
| Day 8 | Tuesday, October 20 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 130830 SPC AC 130830
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0330 AM CDT Tue Oct 13 2026
Valid 161200Z - 211200Z
DISCUSSION
Day 4/Friday
An intense midlevel trough will progress from the Great Lakes to off the Atlantic Coast by Saturday morning. An associated surface low is forecast to develop from the lower Great Lakes to off the New England coast while a trailing cold front advances through much of the eastern CONUS. A moist and at least marginally unstable air mass is forecast in portions of the Mid-Atlantic by afternoon, with thunderstorms possible along and ahead of the front. Vertical shear is expected to be relatively strong, suggesting the potential for isolated severe weather. Level-1/Marginal Risk probabilities may be required in the subsequent Day 3 Outlook for this time period.
### Days 5 through 8/Saturday through Tuesday
A considerably drier and more stable low-level air mass will persist at many locations over the weekend with non-severe storms possible in portions of FL and the lower-CO Valley. By early next week, there is good model agreement that a midlevel trough will move into the western CONUS. In response, a deepening lee trough over the High Plains will lead to increasing moisture return, particularly over the southern Plains by Tuesday. However, no severe weather is expected through that time frame.
..Mead.. 10/13/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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