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A few severe thunderstorms are possible this afternoon in a corridor across western through central New York (state) and adjacent southern Vermont.
← back to overviewSPC AC 160609
Day 1 Convective Outlook CORR 1 NWS Storm Prediction Center Norman OK 0109 AM CDT Thu Apr 16 2026
Valid 161200Z - 171200Z
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON ACROSS PARTS OF WESTERN AND CENTRAL NEW YORK INTO SOUTHERN VERMONT
CORRECTED FOR TYPOS AND WORDING
SUMMARY
A few severe thunderstorms are possible this afternoon in a corridor across western through central New York (state) and adjacent southern Vermont.
Discussion
A significant mid-level trough and embedded low now digging across the Pacific Northwest is forecast to split as it continues inland through this period. One perturbation, perhaps including a continuing cyclonic circulation, is forecast to turn eastward across the northern Rockies through the central Canadian/U.S. border area. Another perturbation is forecast to dig southeastward across the Great Basin into early Friday. It appears that the larger-scale evolving troughing will be preceded by a significant cold frontal surge to the lee of the northern U.S. Rockies, through much of the northern and central Great Plains by 12Z Friday.
Downstream, initially prominent mid-level ridging centered near the southern Atlantic Seaboard is forecast to become increasingly suppressed, as one short wave trough, approaching southwestern portions of the Great Lakes region early today, turns eastward then southeastward across the lower Great Lakes vicinity into northern Mid Atlantic. It appears that this will be trailed by another perturbation, which is forecast to progress east of the Ozark Plateau through the lower Ohio and Tennessee Valleys, before digging across the southern Appalachians, downstream of short wave ridging building across and east of the mid/upper Mississippi Valley.
Mid South into lower Great Lakes and Northeast
The primary and trailing short wave troughs advancing to the east of the Mississippi Valley are forecast to be preceded by the remnants of overnight convection across parts of the lower Great Lakes, Ohio Valley, and Mid South at the outset of the period. The impacts of associated cloud cover and outflow on destabilization within the warm sector of a broad, but weak, surface low migrating northeast of the lower Great Lakes during the day remain unclear. However, various model output, including convection allowing guidance, suggest that destabilization and strengthening shear along a warm frontal zone (as it strengthens with differential heating) may become a focus for organized strong thunderstorm development across New York state by afternoon. It appears that this may include an evolving cluster, perhaps preceded by more discrete thunderstorm activity, in an environment conducive to evolving supercell structures, with potential to produce severe hail, wind and a risk for a couple of tornadoes.
Additional thunderstorm activity may eventually develop and strengthen, accompanied by at least a risk for strong to severe wind gusts by late afternoon, in a corridor of stronger daytime heating ahead of a developing cold front spreading into the upper Ohio Valley/Allegheny and Cumberland Plateau.
Farther west/southwest, there is not a well-defined signal in the latest model output, but a corridor of differential surface heating along weakening trailing convective outflow across the Mid South vicinity could become a focus for supercell development. It currently appears that this potential could peak across north central into northeastern Arkansas by late this afternoon, aided by moderate boundary-layer destabilization and stronger mid-level forcing for ascent associated with a cyclonic vorticity center migrating across the region.
Southern Great Plains
Moderate to strong potential instability is forecast to develop beneath steep lapse rates, along and east of a dryline which likely will be retreating westward across the high plains by early this evening. While this will be conditionally supportive of severe thunderstorm development, forcing to support initiation of sustained thunderstorms remains unclear, aside from, perhaps, the higher terrain near/east of the Texas Big Bend. Beneath moderate to strong southwesterly mid/upper flow, this could include an isolated supercell or two which could propagate across the Rio Grande River, before weakening in the presence of increasing inhibition this evening.
..Kerr/Lyons.. 04/16/2026
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
Widespread severe thunderstorms are expected from parts of the southern Plains to the Middle and Upper Mississippi Valley vicinity Friday into Friday night. Tornadoes, possibly strong, very large hail, and swaths of damaging winds will be possible.
← back to overviewSPC AC 160557
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1257 AM CDT Thu Apr 16 2026
Valid 171200Z - 181200Z
THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF OKLAHOMA…KANSAS…MISSOURI…IOWA…ILLINOIS…FAR SOUTHEAST MINNESOTA…AND WISCONSIN
### SUMMARY
Widespread severe thunderstorms are expected from parts of the southern Plains to the Middle and Upper Mississippi Valley vicinity Friday into Friday night. Tornadoes, possibly strong, very large hail, and swaths of damaging winds will be possible.
Southern Plains to Upper Midwest
A potent upper trough from is expected to eject over the Plains and Upper Midwest on Friday. Strong deep-layer southwesterly flow will overspread the region early in the forecast period, with 850-700 mb flow around 40-50 kt common from parts of OK/KS into WI. At the surface, forecast guidance has trended a bit further north with the position of a surface low Friday morning. This low is expected to be located along the MO River near the SD/IA/NE border, and will develop northeast into northern WI/MI U.P. by late afternoon. A trailing cold front will push southeast across Upper MS/Mid-MO Valley as this occur, becoming oriented from central MI to northwest MO and southeast KS by 00z. Meanwhile, a second low is forecast to develop over the TX Panhandle/western OK within strong heating near a dryline extending southwest from western OK into west-central/western TX. Ahead of these surface features, a seasonally moist airmass will be in place, or, in the case of the Upper Midwest, rapidly advect northward during the morning hours.
A plume of steep midlevel lapse rates, supported by cool to cold temperatures aloft (near -16 C at 500 MB across portions of IA/MN/WI at 21z, and -14 to -12 C further southwest) will overspread the moist boundary layer. This will result in strong destabilization, with MLCAPE around 2500-3500 J/kg expected across the warm sector. This kinematic and thermodynamic environment will support robust convective development near the Upper Midwest surface low southwestward along the cold front into KS by midday. Initial supercells are possible, especially closer to the surface low in the Upper Midwest, and near the triple point/dryline in northwest OK/south-central KS. More rapid upscale growth into a robust line/LEWP is expected along the cold front from parts of IA into MO and eastern KS. Given robust instability and very steep lapse rates, significant damaging wind swaths will be possible. Additionally, large to very large hail will be possible with any discrete supercells, and possibly within line-embedded supercells. Low-level wind profiles will also support a aerially extensive tornado risk, both with QLCS mesovortex circulations, and with discrete supercells. A corridor of perhaps greater tornado risk/coverage may develop near the surface low from northeast IA into central WI. Low-level SRH will be maximized in this area and forecast soundings indicate large, curved hodographs becoming elongated above 2-3 km. Furthermore, mixing ratios near 14 g/kg and very steep lapse rates should support robust updrafts with low cloud bases. This are may become a focused corridor for stronger tornadoes.
Linear convection should continue east across the MS River and Lake Michigan during the evening and overnight hours, with a gradually waning severe risk into portions of central/southern IL, Lower MI and IN. Additional convection may develop during the evening and/or overnight across parts of TX near the dryline, though this scenario is more conditional. If storms do develop, large will be the main risk.
..Leitman.. 04/16/2026
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 1730Z
Isolated strong to severe thunderstorms capable of damaging winds and hail will be possible on Saturday across part of the Ohio Valley.
← back to overviewSPC AC 160705
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0205 AM CDT Thu Apr 16 2026
Valid 181200Z - 191200Z
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE OHIO VALLEY
### SUMMARY
Isolated strong to severe thunderstorms capable of damaging winds and hail will be possible on Saturday across part of the Ohio Valley.
Ohio Valley
A large-scale upper trough oriented over the Upper Midwest and Plains will shift east over the Great Lakes, Midwest and TN Valley on Saturday/Saturday night. Strong deep-layer southwesterly flow will overspread the Ohio Valley ahead of an eastward-advancing cold front. This front should be located from Lower MI into southeast MO Saturday morning, moving across the Ohio Valley through early evening. Modest boundary-layer moisture will be in place ahead of the front. Daytime heating into the 70s and modestly steep midlevel lapse rates will support weak destabilization (generally less than 1000 J/kg MLCAPE). While instability will be modest, strong low and midlevel flow will support organized cells and/or line segments capable of strong gusts. Any discrete cellular activity also may produce marginally severe hail. These severe risk should gradually wane during the evening with eastward extent.
TX to the Lower MS Valley
Thunderstorms are expected along a southeast-advancing cold front Saturday afternoon and evening. Deep-layer flow will be oriented parallel to the front, and convection may largely be anafrontal or quickly undercut by the front. While weak MUCAPE is noted in forecast soundings, severe potential is not expected at this time.
..Leitman.. 04/16/2026
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 | Sunday, April 19 | potential too low |
| Day 5 | Monday, April 20 | potential too low |
| Day 6 | Tuesday, April 21 | potential too low |
| Day 7 | Wednesday, April 22 | predictability too low |
| Day 8 | Thursday, April 23 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 160838 SPC AC 160838
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0338 AM CDT Thu Apr 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Severe thunderstorm potential will be low through at least Day 6/Tuesday. In the wake of a cold front moving offshore the Atlantic coast and into the Gulf, strong surface high pressure will build east of the Rockies and persist across parts of the South and East through Day 6/Tuesday. As a result, a dry and stable boundary layer will preclude severe thunderstorm potential.
By the middle of the week, and upper trough is forecast to overspread the western U.S. As this occurs, lee surface troughing will allow for increasing southerly winds over the Plains, and Gulf moisture will begin to return northward Days 7-8/Wed-Thu. It remains uncertain if the upper trough will begin to eject eastward toward the Plains at the end of the period. If this occurs, some severe potential may develop across the Plains, though predictability is low.
..Leitman.. 04/16/2026
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 | Sunday, April 19 | potential too low |
| Day 5 | Monday, April 20 | potential too low |
| Day 6 | Tuesday, April 21 | potential too low |
| Day 7 | Wednesday, April 22 | predictability too low |
| Day 8 | Thursday, April 23 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 160838 SPC AC 160838
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0338 AM CDT Thu Apr 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Severe thunderstorm potential will be low through at least Day 6/Tuesday. In the wake of a cold front moving offshore the Atlantic coast and into the Gulf, strong surface high pressure will build east of the Rockies and persist across parts of the South and East through Day 6/Tuesday. As a result, a dry and stable boundary layer will preclude severe thunderstorm potential.
By the middle of the week, and upper trough is forecast to overspread the western U.S. As this occurs, lee surface troughing will allow for increasing southerly winds over the Plains, and Gulf moisture will begin to return northward Days 7-8/Wed-Thu. It remains uncertain if the upper trough will begin to eject eastward toward the Plains at the end of the period. If this occurs, some severe potential may develop across the Plains, though predictability is low.
..Leitman.. 04/16/2026
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 | Sunday, April 19 | potential too low |
| Day 5 | Monday, April 20 | potential too low |
| Day 6 | Tuesday, April 21 | potential too low |
| Day 7 | Wednesday, April 22 | predictability too low |
| Day 8 | Thursday, April 23 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 160838 SPC AC 160838
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0338 AM CDT Thu Apr 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Severe thunderstorm potential will be low through at least Day 6/Tuesday. In the wake of a cold front moving offshore the Atlantic coast and into the Gulf, strong surface high pressure will build east of the Rockies and persist across parts of the South and East through Day 6/Tuesday. As a result, a dry and stable boundary layer will preclude severe thunderstorm potential.
By the middle of the week, and upper trough is forecast to overspread the western U.S. As this occurs, lee surface troughing will allow for increasing southerly winds over the Plains, and Gulf moisture will begin to return northward Days 7-8/Wed-Thu. It remains uncertain if the upper trough will begin to eject eastward toward the Plains at the end of the period. If this occurs, some severe potential may develop across the Plains, though predictability is low.
..Leitman.. 04/16/2026
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 | Sunday, April 19 | potential too low |
| Day 5 | Monday, April 20 | potential too low |
| Day 6 | Tuesday, April 21 | potential too low |
| Day 7 | Wednesday, April 22 | predictability too low |
| Day 8 | Thursday, April 23 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 160838 SPC AC 160838
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0338 AM CDT Thu Apr 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Severe thunderstorm potential will be low through at least Day 6/Tuesday. In the wake of a cold front moving offshore the Atlantic coast and into the Gulf, strong surface high pressure will build east of the Rockies and persist across parts of the South and East through Day 6/Tuesday. As a result, a dry and stable boundary layer will preclude severe thunderstorm potential.
By the middle of the week, and upper trough is forecast to overspread the western U.S. As this occurs, lee surface troughing will allow for increasing southerly winds over the Plains, and Gulf moisture will begin to return northward Days 7-8/Wed-Thu. It remains uncertain if the upper trough will begin to eject eastward toward the Plains at the end of the period. If this occurs, some severe potential may develop across the Plains, though predictability is low.
..Leitman.. 04/16/2026
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 | Sunday, April 19 | potential too low |
| Day 5 | Monday, April 20 | potential too low |
| Day 6 | Tuesday, April 21 | potential too low |
| Day 7 | Wednesday, April 22 | predictability too low |
| Day 8 | Thursday, April 23 | predictability too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 160838 SPC AC 160838
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0338 AM CDT Thu Apr 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Severe thunderstorm potential will be low through at least Day 6/Tuesday. In the wake of a cold front moving offshore the Atlantic coast and into the Gulf, strong surface high pressure will build east of the Rockies and persist across parts of the South and East through Day 6/Tuesday. As a result, a dry and stable boundary layer will preclude severe thunderstorm potential.
By the middle of the week, and upper trough is forecast to overspread the western U.S. As this occurs, lee surface troughing will allow for increasing southerly winds over the Plains, and Gulf moisture will begin to return northward Days 7-8/Wed-Thu. It remains uncertain if the upper trough will begin to eject eastward toward the Plains at the end of the period. If this occurs, some severe potential may develop across the Plains, though predictability is low.
..Leitman.. 04/16/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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