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Clusters of storms will move across parts of the Allegheny Plateau into the Mid-Atlantic, with potential for numerous damaging wind gusts. Additional severe thunderstorms are expected across the Great Plains this afternoon and evening, posing a risk for severe wind gusts and large hail.
← back to overviewSPC AC 041601
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1101 AM CDT Sat Jul 04 2026
Valid 041630Z - 051200Z
THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE MID-ATLANTIC AS WELL AS ACROSS PORTIONS OF SOUTHERN KANSAS AND NORTHERN OKLAHOMA
### THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE CENTRAL PLAINS INTO THE MID ATLANTIC AND SOUTHERN NEW ENGLAND
### SUMMARY
Clusters of storms will move across parts of the Allegheny Plateau into the Mid-Atlantic, with potential for numerous damaging wind gusts. Additional severe thunderstorms are expected across the Great Plains this afternoon and evening, posing a risk for severe wind gusts and large hail.
Mid Atlantic
A hot summer day is forecast across the Mid Atlantic region today with temperatures well into the 90s and dewpoints ranging from the mid 60-lower 70s F. Full sun will result in steep low-level lapse rates and high CAPE values beneath moderately strong northwest mid-level flow. Scattered thunderstorms are expected to develop along/east of the Blue Ridge and spread eastward across parts of PA/VA/NJ/DE through the late afternoon and evening. Parameters remain favorable for downburst winds in these clusters of storms.
PA/NY into southern New England
A weak shortwave trough and associated mid level speed max is rotating southeastward out of Ontario/Quebec into the northeast US. Ample low-level moisture and pockets of moderate CAPE will result in widely scattered afternoon thunderstorm development from northern PA into central NY. These storms will spread southeastward into southern New England by early evening. The strongest cells will pose a risk of damaging wind gusts.
..IL/IN
A remnant MCV from overnight convection is analyzed over eastern IA, with a surface boundary extending eastward just south of CHI. The air mass to the south of the boundary across IL will become very unstable by mid-afternoon, leading to scattered thunderstorms. Favorable thermodynamic parameters suggest a risk of damaging winds as these storms organize and track into IN by evening.
KS/MO
An ongoing cluster of strong/severe storms is affecting eastern KS. Given the moist and unstable air mass to the east and sufficient mesoscale organization, it is probable that this cluster will persist into the afternoon. Storms will track into western MO with a continued risk of locally damaging wind gusts.
KS/OK/AR
In the wake of the aforementioned cluster of storms, new development is likely later this afternoon along the remnant outflow boundary across southern KS and northern OK. High CAPE values to the south of the boundary will promote the ENH risk of damaging winds and some hail as storms build southeastward across central/eastern OK and into western AR this evening.
TX Panhandle
A weak surface boundary will be the focus for scattered late afternoon thunderstorms over the southern/eastern TX Panhandle. The strongest cells may produce damaging wind gusts and large hail for a few hours.
Northeast CO
Southerly low level winds will maintain dewpoints in at least the 40s over parts of eastern CO this afternoon despite strong heating/mixing. This will be sufficient to allow scattered thunderstorms to form along the foothills and DCVZ. A few severe cells are possible with large hail being the main risk.
MN/SD
Similar to yesterday, a few afternoon and early evening thunderstorms are expected to develop ahead of a weak shortwave trough. The strongest cells might produce large hail or gusty winds.
..Hart/Weinman.. 07/04/2026
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z
Scattered wind damage is possible with thunderstorms across the Mid-Atlantic Sunday afternoon and evening. Isolated strong storms also are possible across Montana and western North Dakota, and portions of the southern Plains to the Tennessee Valley.
← back to overviewSPC AC 041703
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1203 PM CDT Sat Jul 04 2026
Valid 051200Z - 061200Z
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE MID-ATLANTIC SUNDAY AFTERNOON AND EVENING
### SUMMARY
Scattered wind damage is possible with thunderstorms across the Mid-Atlantic Sunday afternoon and evening. Isolated strong storms also are possible across Montana and western North Dakota, and portions of the southern Plains to the Tennessee Valley.
Mid-Atlantic
A weak surface low is forecast to move west to east along a sagging cold front/baroclinic zone draped across PA into northern NJ/southeast NY on Sunday/Sunday evening. Meanwhile, lee troughing will develop across VA. A hot and very moist airmass will reside near and south of these boundaries, which will serve as a focus for severe storm development during the afternoon and into evening. Southwesterly flow aloft will weaken through the day as an upper shortwave impulse lifts northeast of the region, but around 20-30 kt mid/upper-level flow will persist. Moderate to strong destabilization is expected and thunderstorm clusters are expected by early to mid-afternoon. Sufficient clustering could occur along the southward-sagging cold front and one or more forward propagating clusters will be possible from northern VA into southeast PA until storms move offshore the Mid-Atlantic coast during the evening. Sufficient consistency among deterministic/CAMs and AI/ML guidance exists regarding storm coverage to warrant an upgrade to 30 percent wind probabilities for portions of the region.
Southern Plains to TN Valley
An remnant/weakening MCS is expected to be located over OK or AR Sunday morning. An MCV related to this feature will progress eastward toward the Lower MS and TN Valley vicinity through the day. Further south and west near the Red River Valley/North Texas into the southern High Plains, outflow associated with the late-Day 1/Saturday into early Day 2/Sunday MCS may arc across this region. Differential heating could occur along this boundary, providing support for redevelopment during the afternoon/evening. Boundary layer moisture will be modest with westward extent into the High Plains, but steep lapse rates aloft, and increasing moisture with eastward extent into the Lower MS Valley will support a corridor of moderate instability in the vicinity of the surface boundary. Northwesterly flow aloft will also modestly strengthen through the day, fostering weak, but perhaps sufficient vertical shear for transient organized cells/clusters along the boundary.
Further east, the MCV will locally enhance vertical shear amid a very moist and moderately unstable airmass. This could foster potential for one or more forward propagating storm clusters, and some risk for damaging gusts from wet microbursts, leading to a broad expansion of the Marginal (level 1 of 5) risk across parts of the Lower MS/TN Valley vicinity.
Northern Rockies into North Dakota
West/southwest flow aloft will strengthen across MT into ND as an upper shortwave trough moving across western Canada glances northern portions of the U.S. A plume of steep midlevel lapse rates will stretch from the northern Great Basin through southern/eastern MT into the western Dakotas. Low-level moisture will not be impressive, but the steep lapse rates aloft will support a corridor of modest destabilization across MT, and somewhat greater across western ND where boundary-layer moisture will be marginally better along a surface trough. Vertically veering wind profiles, with increasing speeds above 700 mb will support effective shear magnitudes greater than 30 kt, and organized storms are possible. Strong gusts and isolated hail will be the main hazards with these storms during the afternoon into evening.
..Leitman.. 07/04/2026
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z
Strong thunderstorm development posing at least some risk for severe hail and wind is possible across parts of the central and eastern Dakotas into northwestern Minnesota Monday into Monday night.
← back to overviewSPC AC 040729
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0229 AM CDT Sat Jul 04 2026
Valid 061200Z - 071200Z
THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS MONDAY AFTERNOON AND EVENING ACROSS PARTS OF THE CENTRAL AND EASTERN DAKOTAS AND NORTHWESTERN MINNESOTA
### SUMMARY
Strong thunderstorm development posing at least some risk for severe hail and wind is possible across parts of the central and eastern Dakotas into northwestern Minnesota Monday into Monday night.
Discussion
Downstream of digging large-scale mid-level troughing and an associated surface cyclone slowly approaching the British Columbia and Pacific Northwest coast, ridging may become increasingly prominent across Baja California through the southern Rockies and central Great Plains during this period. Mid-level heights may tend to remain steady or slowly rise as far north as the eastern Montana/North Dakota international border, in the wake of a notable mid-level trough forecast to progress through northwestern Ontario and Hudson Bay by late Monday night.
It appears that one vigorous impulse embedded within the troughing, and forecast to continue accelerating east-northeastward, to the north of the international border, may provide support for stronger secondary cyclogenesis near the northern Manitoba/Ontario border into southern Hudson Bay late Monday/Monday night.
To the east of the mid-level ridging, weak mid-level troughing may continue to drift slowly east of the Mississippi Valley, toward the Appalachians.
In association with this evolving regime, the potential for organized severe thunderstorm development appears generally low Monday through Monday night across most areas, with the possible exception of parts of the central/eastern Dakotas into northwestern Minnesota
Northern Great Plains
Deeper surface troughing and mid-level height falls are forecast to pass to the north of the international border through this period. However, there appears at least some signal in model output that boundary-layer moisture return to the vicinity of weak pre-frontal surface troughing, coincident with southeastward suppression of warmer and more strongly capping elevated mixed-layer air, could allow for scattered strong thunderstorm development posing a risk for severe hail and wind across parts of the central/eastern Dakotas into northwestern Minnesota. Preceding the leading edge of the cooling in lower/mid-levels, it is possible that a zone of strengthening ascent associated with warm advection could support an upscale growing cluster, aided by updraft inflow of moderately unstable air. However, this remains more uncertain at this time.
..Kerr.. 07/04/2026
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, July 7 | predictability too low |
| Day 5 | Wednesday, July 8 | predictability too low |
| Day 6 | Thursday, July 9 | predictability too low |
| Day 7 | Friday, July 10 | predictability too low |
| Day 8 | Saturday, July 11 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 040843 SPC AC 040843
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0343 AM CDT Sat Jul 04 2026
Valid 071200Z - 121200Z
DISCUSSION
Based on the latest medium-range guidance, it appears that considerable amplification within the flow across the mid- and subtropical latitudes of the Pacific during this period may lead to the evolution of an increasingly prominent high becoming centered near or to the northeast of the Four Corners by early next weekend. Surrounding ridging may encompass much of the Intermountain West through Great Plains, as far north as the Canadian Prairies.
Associated monsoonal moisture return into parts of the Southwest may be accompanied by increasing convective potential that could include evolving clusters capable of producing strong to severe wind gusts. However, much as will likely remain the case in preceding days across and east of the Rockies, organized severe weather potential, if any, will be strongly influenced by sub-synoptic developments yet to evolve, and with low predictability at this extended time frame.
..Kerr.. 07/04/2026
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, July 7 | predictability too low |
| Day 5 | Wednesday, July 8 | predictability too low |
| Day 6 | Thursday, July 9 | predictability too low |
| Day 7 | Friday, July 10 | predictability too low |
| Day 8 | Saturday, July 11 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 040843 SPC AC 040843
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0343 AM CDT Sat Jul 04 2026
Valid 071200Z - 121200Z
DISCUSSION
Based on the latest medium-range guidance, it appears that considerable amplification within the flow across the mid- and subtropical latitudes of the Pacific during this period may lead to the evolution of an increasingly prominent high becoming centered near or to the northeast of the Four Corners by early next weekend. Surrounding ridging may encompass much of the Intermountain West through Great Plains, as far north as the Canadian Prairies.
Associated monsoonal moisture return into parts of the Southwest may be accompanied by increasing convective potential that could include evolving clusters capable of producing strong to severe wind gusts. However, much as will likely remain the case in preceding days across and east of the Rockies, organized severe weather potential, if any, will be strongly influenced by sub-synoptic developments yet to evolve, and with low predictability at this extended time frame.
..Kerr.. 07/04/2026
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, July 7 | predictability too low |
| Day 5 | Wednesday, July 8 | predictability too low |
| Day 6 | Thursday, July 9 | predictability too low |
| Day 7 | Friday, July 10 | predictability too low |
| Day 8 | Saturday, July 11 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 040843 SPC AC 040843
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0343 AM CDT Sat Jul 04 2026
Valid 071200Z - 121200Z
DISCUSSION
Based on the latest medium-range guidance, it appears that considerable amplification within the flow across the mid- and subtropical latitudes of the Pacific during this period may lead to the evolution of an increasingly prominent high becoming centered near or to the northeast of the Four Corners by early next weekend. Surrounding ridging may encompass much of the Intermountain West through Great Plains, as far north as the Canadian Prairies.
Associated monsoonal moisture return into parts of the Southwest may be accompanied by increasing convective potential that could include evolving clusters capable of producing strong to severe wind gusts. However, much as will likely remain the case in preceding days across and east of the Rockies, organized severe weather potential, if any, will be strongly influenced by sub-synoptic developments yet to evolve, and with low predictability at this extended time frame.
..Kerr.. 07/04/2026
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, July 7 | predictability too low |
| Day 5 | Wednesday, July 8 | predictability too low |
| Day 6 | Thursday, July 9 | predictability too low |
| Day 7 | Friday, July 10 | predictability too low |
| Day 8 | Saturday, July 11 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 040843 SPC AC 040843
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0343 AM CDT Sat Jul 04 2026
Valid 071200Z - 121200Z
DISCUSSION
Based on the latest medium-range guidance, it appears that considerable amplification within the flow across the mid- and subtropical latitudes of the Pacific during this period may lead to the evolution of an increasingly prominent high becoming centered near or to the northeast of the Four Corners by early next weekend. Surrounding ridging may encompass much of the Intermountain West through Great Plains, as far north as the Canadian Prairies.
Associated monsoonal moisture return into parts of the Southwest may be accompanied by increasing convective potential that could include evolving clusters capable of producing strong to severe wind gusts. However, much as will likely remain the case in preceding days across and east of the Rockies, organized severe weather potential, if any, will be strongly influenced by sub-synoptic developments yet to evolve, and with low predictability at this extended time frame.
..Kerr.. 07/04/2026
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, July 7 | predictability too low |
| Day 5 | Wednesday, July 8 | predictability too low |
| Day 6 | Thursday, July 9 | predictability too low |
| Day 7 | Friday, July 10 | predictability too low |
| Day 8 | Saturday, July 11 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 040843 SPC AC 040843
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0343 AM CDT Sat Jul 04 2026
Valid 071200Z - 121200Z
DISCUSSION
Based on the latest medium-range guidance, it appears that considerable amplification within the flow across the mid- and subtropical latitudes of the Pacific during this period may lead to the evolution of an increasingly prominent high becoming centered near or to the northeast of the Four Corners by early next weekend. Surrounding ridging may encompass much of the Intermountain West through Great Plains, as far north as the Canadian Prairies.
Associated monsoonal moisture return into parts of the Southwest may be accompanied by increasing convective potential that could include evolving clusters capable of producing strong to severe wind gusts. However, much as will likely remain the case in preceding days across and east of the Rockies, organized severe weather potential, if any, will be strongly influenced by sub-synoptic developments yet to evolve, and with low predictability at this extended time frame.
..Kerr.. 07/04/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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