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Severe thunderstorms are expected mainly tonight across the Dakotas. Large to very large hail and severe winds are the primary hazards. Thunderstorms capable of scattered wind damage are possible in parts of the Carolinas.
← back to overviewSPC AC 281959
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0259 PM CDT Sun Jun 28 2026
Valid 282000Z - 291200Z
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE NORTHERN PLAINS AND THE CAROLINAS
### SUMMARY
Severe thunderstorms are expected mainly tonight across the Dakotas. Large to very large hail and severe winds are the primary hazards. Thunderstorms capable of scattered wind damage are possible in parts of the Carolinas.
20Z Update
The SLGT risk in eastern IA was removed, given recent convective trends and displacement from the parent/weakening MCV. The MRGL risk in the wake of this activity was also trimmed in parts of the Midwest, where robust capping at the base of the EML will limit thunderstorm/severe potential.
Farther west, the SLGT risk in the northern Plains was expanded slightly southwestward in southwest SD, where steepening midlevel lapse rates and around 60 kt of effective shear will promote large hail with intensifying elevated supercells overnight.
..Weinman.. 06/28/2026
.PREV DISCUSSION… /ISSUED 1131 AM CDT Sun Jun 28 2026/
Dakotas/northern Plains
A belt of south-southwesterly mid-level flow near 50 kt will be maintained from Colorado to the Dakotas, east of the broad closed low over the northern Great Basin/Rockies. A separate lee cyclone is expected to form in the vicinity of northeast Colorado this afternoon and then progress northeastward across Nebraska/South Dakota overnight.
A few storms will be possible in North Dakota during the afternoon with perhaps an isolated severe risk developing, but the primary regional severe risk is expected tonight. Much of the severe threat will likely focus after dark immediately north of the lee cyclone into South Dakota as low-level moisture steadily spreads west-northwestward. This increasing moisture and forcing for ascent preceding the surface cyclone (and subtle embedded speed maxima aloft) will likely support thunderstorm development overnight across western South Dakota into southern North Dakota. The environment will favor supercells, which will tend to be elevated, and small thunderstorm clusters capable of large to very large hail and severe wind gusts.
Upper Mississippi Valley
A bowing cluster has weakened and tended to grow downscale this morning but otherwise persists across eastern Iowa at midday. Some redevelopment/re-intensification could occur on the cluster's southern periphery near a warm front. However, this is highly uncertain given the increasing mid-level capping/EML advection the remainder of the night.
Later tonight, a zone of low-level warm advection will be focused across Wisconsin along the northeast edge of the warm elevated mixed layer. Sufficient moistening above the surface and large CAPE will favor the potential for at least isolated large hail/strong gusts with mostly elevated storms tonight.
Carolinas and far southern Virginia this afternoon/evening
A convectively augmented mid-level disturbance over the southern Appalachians will move southeastward into the Piedmont by this afternoon. An airmass sampled by area 12 UTC raobs (PW near 2 inches) will heat/destabilize to the south of a patch of clouds that are more prevalent over western North Carolina. Steepening low-level lapse rates and a belt of slightly stronger westerly 3-6 km flow (30 kt) may act to loosely organize cold pools of developing thunderstorm clusters. Isolated to scattered wind damage (50-60 mph gusts) will be the primary hazard with the more intense water-loaded thunderstorm cores until around sunset.
West Texas late this afternoon/evening
Strong surface heating and deep mixing along a sharpening dryline will allow high-based thunderstorm development from late afternoon through late evening. Flow aloft will be weak, but inverted-V profiles will yield isolated severe outflow gusts of 60-75 mph.
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z
Severe thunderstorms are possible from parts of the central/northern Plains into the Upper Midwest on Monday. Large hail and severe winds are the primary concerns, though a couple of tornadoes may also occur.
← back to overviewSPC AC 281658
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1158 AM CDT Sun Jun 28 2026
Valid 291200Z - 301200Z
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE NORTHERN AND CENTRAL PLAINS AND UPPER MIDWEST
### SUMMARY
Severe thunderstorms are possible from parts of the central/northern Plains into the Upper Midwest on Monday. Large hail and severe winds are the primary concerns, though a couple of tornadoes may also occur.
Synopsis
An upper low and attendant shortwave trough, initially over the northern Rockies, will eject east/northeast across the northern Plains on Monday. This will bring a belt of enhanced mid/upper south/southwesterly flow across parts of the northern/central Plains to the Upper Midwest. At the surface, low pressure will deepen over SD and lift north/northeast through evening. A trailing cold front/dryline will move across the Dakotas and portions of NE after 00z while a warm front lifts northward across parts of eastern ND and northern MN through the day. A secondary lee surface low will develop over the central High Plains, with a dryline extending south/southwest across western KS into southwest TX.
Dakotas/Mid-MO Valley/Upper Midwest
Uncertainty over mesoscale details persists this forecast cycle, though overall model guidance continues to show better agreement. Convection appears likely to be ongoing Monday morning across the central Dakotas near the deepening surface low and northward extending frontal occlusion. This activity may be elevated, but supercell wind profiles are evident in forecast soundings with elongated/straight hodographs noted amid 50+ kt effective shear magnitudes. A plume of steep midlevel lapse rates will be in place across the region and elevated convection will pose a risk for large to very large hail early in the day as storms move northward.
A very moist and unstable airmass will reside across the region, with strong to extreme instability depicted in forecast guidance. Convective evolution is uncertain. The extent of morning convection could augment the northward extent of the richer boundary layer moisture and instability. Guidance also varies in regards to the evolution of the surface low, with some guidance being slower and other solutions much faster. Nevertheless, the surface low/triple point, warm front, and surface tough/cold front will be areas for concern for convective development during the day and into the afternoon. If supercells can develop and be surface-based near the warm front, an all-hazards severe risk is evident given the very favorable thermodynamic and kinematic parameter space. While initial supercells are possible during the evening along the cold front from the Mid-MO Valley into southern MN, boundary-parallel deep-layer flow and an intensifying low-level jet could result in rapid upscale growth into a bowing segment during the nighttime hours. This could result in an increase in damaging wind potential if nighttime convection can be near-surface based.
KS/OK/TX
Isolated to scattered high-based thunderstorms are likely during the evening along the dryline. Instability and vertical shear will be modest, limiting longevity of stronger updrafts. Nevertheless, a deeply mixed boundary layer with inverted-v sub-cloud thermodynamic profiles could support strong outflow gusts. Overall severe potential appears limited, precluding marginal probabilities at this time.
Southeast
Moderate instability will develop amid a seasonally moist airmass near the Savannah River into GA Monday afternoon/early evening. A backdoor/wedge front is expected to push south/southwest across SC and may contribute to isolated to scattered thunderstorm development by peak heating within a deep-layer northwesterly flow regime. Vertical shear will be weak, but occasional sub-severe gusty outflows will be possible, mainly across central/southern GA.
..Leitman.. 06/28/2026
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z
Severe thunderstorms will be possible from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast on Tuesday.
← back to overviewSPC AC 281909
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0209 PM CDT Sun Jun 28 2026
Valid 301200Z - 011200Z
THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM THE CENTRAL HIGH PLAINS TO THE UPPER GREAT LAKES…AND ACROSS PARTS OF THE NORTHEAST
### SUMMARY
Severe thunderstorms will be possible from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast on Tuesday.
Mid-MO Valley to Upper Great Lakes
A compact upper low and attendant shortwave trough will be located over the Canadian Prairies into the Upper Midwest Tuesday morning. This system will progress east/northeast through the day. While large-scale ascent will increasing be focused north of the international border, stronger southwesterly deep-layer flow will persist for most of the day before weakening by evening. At the surface, a stalled surface front will be oriented from northeast MN into southeast SD/northern NE. Convection may be ongoing near this boundary somewhere in MN or perhaps northern WI/Michigan Upper Peninsula vicinity. A very moist airmass will be in place and strong to extreme instability is forecast through the day across portions of the region. If organized storms can develop, a risk for damaging winds and hail is possible - particularly if upscale development into a bowing segment occurs. Overall the forecast remains uncertain and any corridors of greater severe potential will be heavily influenced by remnant convection from the Day 2/Monday period and mesoscale impacts thereof.
CO/KS/NE/SD
An upper shortwave impulse initially over the Great Basin early Tuesday will eject eastward across the central Rockies and into the adjacent High Plains during the evening/overnight hours. As this occurs, a lee surface low will develop. Increasing south/southeasterly low-level flow will transport modest boundary layer moisture north and west. Isolated storms may develop near the lee low and surface trough across eastern CO into western KS and northeastward across western NE into southern SD along the remnant cold front/effective warm front extending west to east near the NE/SD border. Damaging winds and hail are possible with this activity, though storm coverage and mesoscale details remain uncertain.
Northeast
Most forecast guidance suggest storms will develop southeast across the region from Canada within a mid/upper-level northwesterly flow regime on the eastern periphery of an upper ridge. A very moist airmass will support a corridor of moderate to strong instability, though the north and eastward extent of stronger instability is uncertain. Forecast soundings indicated 25-35 kt effective shear magnitudes, and isolated supercells will be possible. If sufficient clustering or outflow consolidation occurs, a forward propagating band of storms also is possible. Damaging wind gusts will be the primary hazard, though isolated hail or even a tornado also will be possible depending on storm mode and evolution. If confidence increases in a corridor of greater severe potential higher probabilities may be needed in subsequent outlooks.
..Leitman.. 06/28/2026
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 | Wednesday, July 1 | predictability too low |
| Day 5 | Thursday, July 2 | predictability too low |
| Day 6 | Friday, July 3 | predictability too low |
| Day 7 | Saturday, July 4 | predictability too low |
| Day 8 | Sunday, July 5 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 280846 SPC AC 280846
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0346 AM CDT Sun Jun 28 2026
Valid 011200Z - 061200Z
DISCUSSION
Relatively little change is expected in the upper-level pattern from mid to late this week. A broad trough in the West will bring southwesterly flow across the Rockies and parts of the Plains. In the East, an upper ridge will persist. During the weekend, models are in general agreement that the upper ridge will flatten and broaden across the southern U.S. This pattern will favor the maintenance of a very moist airmass within parts of the Plains into the Midwest and Southeast. The lack of more notable mid-level and surface features decrease predictability with regard to where severe convection may occur. That being said, subtle surface boundaries/shortwave troughs may promote convective development each day within parts of the Plains/Midwest. Trends in model guidance will continue to be monitored, but confidence remains low in placing severe probabilities.
..Wendt.. 06/28/2026
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 | Wednesday, July 1 | predictability too low |
| Day 5 | Thursday, July 2 | predictability too low |
| Day 6 | Friday, July 3 | predictability too low |
| Day 7 | Saturday, July 4 | predictability too low |
| Day 8 | Sunday, July 5 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 280846 SPC AC 280846
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0346 AM CDT Sun Jun 28 2026
Valid 011200Z - 061200Z
DISCUSSION
Relatively little change is expected in the upper-level pattern from mid to late this week. A broad trough in the West will bring southwesterly flow across the Rockies and parts of the Plains. In the East, an upper ridge will persist. During the weekend, models are in general agreement that the upper ridge will flatten and broaden across the southern U.S. This pattern will favor the maintenance of a very moist airmass within parts of the Plains into the Midwest and Southeast. The lack of more notable mid-level and surface features decrease predictability with regard to where severe convection may occur. That being said, subtle surface boundaries/shortwave troughs may promote convective development each day within parts of the Plains/Midwest. Trends in model guidance will continue to be monitored, but confidence remains low in placing severe probabilities.
..Wendt.. 06/28/2026
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 | Wednesday, July 1 | predictability too low |
| Day 5 | Thursday, July 2 | predictability too low |
| Day 6 | Friday, July 3 | predictability too low |
| Day 7 | Saturday, July 4 | predictability too low |
| Day 8 | Sunday, July 5 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 280846 SPC AC 280846
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0346 AM CDT Sun Jun 28 2026
Valid 011200Z - 061200Z
DISCUSSION
Relatively little change is expected in the upper-level pattern from mid to late this week. A broad trough in the West will bring southwesterly flow across the Rockies and parts of the Plains. In the East, an upper ridge will persist. During the weekend, models are in general agreement that the upper ridge will flatten and broaden across the southern U.S. This pattern will favor the maintenance of a very moist airmass within parts of the Plains into the Midwest and Southeast. The lack of more notable mid-level and surface features decrease predictability with regard to where severe convection may occur. That being said, subtle surface boundaries/shortwave troughs may promote convective development each day within parts of the Plains/Midwest. Trends in model guidance will continue to be monitored, but confidence remains low in placing severe probabilities.
..Wendt.. 06/28/2026
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 | Wednesday, July 1 | predictability too low |
| Day 5 | Thursday, July 2 | predictability too low |
| Day 6 | Friday, July 3 | predictability too low |
| Day 7 | Saturday, July 4 | predictability too low |
| Day 8 | Sunday, July 5 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 280846 SPC AC 280846
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0346 AM CDT Sun Jun 28 2026
Valid 011200Z - 061200Z
DISCUSSION
Relatively little change is expected in the upper-level pattern from mid to late this week. A broad trough in the West will bring southwesterly flow across the Rockies and parts of the Plains. In the East, an upper ridge will persist. During the weekend, models are in general agreement that the upper ridge will flatten and broaden across the southern U.S. This pattern will favor the maintenance of a very moist airmass within parts of the Plains into the Midwest and Southeast. The lack of more notable mid-level and surface features decrease predictability with regard to where severe convection may occur. That being said, subtle surface boundaries/shortwave troughs may promote convective development each day within parts of the Plains/Midwest. Trends in model guidance will continue to be monitored, but confidence remains low in placing severe probabilities.
..Wendt.. 06/28/2026
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 | Wednesday, July 1 | predictability too low |
| Day 5 | Thursday, July 2 | predictability too low |
| Day 6 | Friday, July 3 | predictability too low |
| Day 7 | Saturday, July 4 | predictability too low |
| Day 8 | Sunday, July 5 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 280846 SPC AC 280846
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0346 AM CDT Sun Jun 28 2026
Valid 011200Z - 061200Z
DISCUSSION
Relatively little change is expected in the upper-level pattern from mid to late this week. A broad trough in the West will bring southwesterly flow across the Rockies and parts of the Plains. In the East, an upper ridge will persist. During the weekend, models are in general agreement that the upper ridge will flatten and broaden across the southern U.S. This pattern will favor the maintenance of a very moist airmass within parts of the Plains into the Midwest and Southeast. The lack of more notable mid-level and surface features decrease predictability with regard to where severe convection may occur. That being said, subtle surface boundaries/shortwave troughs may promote convective development each day within parts of the Plains/Midwest. Trends in model guidance will continue to be monitored, but confidence remains low in placing severe probabilities.
..Wendt.. 06/28/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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