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Thunderstorms are possible across Pacific coastal areas much of California Tuesday, and across parts of the mid Missouri Valley into the Upper Midwest late. The risk for severe storms appears low.
← back to overviewSPC AC 170534
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1134 PM CST Mon Feb 16 2026
Valid 171200Z - 181200Z
NO SEVERE THUNDERSTORM AREAS FORECAST
### SUMMARY
Thunderstorms are possible across Pacific coastal areas much of California Tuesday, and across parts of the mid Missouri Valley into the Upper Midwest late. The risk for severe storms appears low.
Pacific Coastal States
An upper low will drop south toward the coastal Pacific Northwest today as a strong upper speed max noses into central CA by 00Z. This feature will translate southward overnight and into southern CA by 12Z Wed. North of the upper jet, very cold temperatures aloft will exist which will result in a few hundred J/kg SBCAPE despite cool surface conditions. While favorable shear profiles will develop southward through the central valleys, surface temperatures will largely be in the 40s to perhaps lower 50s F, with generally limited heating. Very small hail cannot be ruled out in the strongest convection given long hodographs and such cold temperatures aloft, but severe storms are not currently forecast.
Mid MO Valley / Upper Midwest
A leading shortwave trough will move into the Plains today, with a strong speed max aloft from NM into KS by 00Z. The strongest cooling aloft and lift will occur from NE into the Dakotas, and into western MN/IA be evening. Low pressure will develop into SD during the afternoon, with a cold front pushing toward the mid MO Valley. While surface heating as well as boundary-layer mixing will steepen low-level lapse rates in the veered flow, it appears capping may hold atop the plume of 40s F dewpoints ahead of the wind shift. An isolated thunderstorm cannot totally be ruled out through 00Z, but a greater chance will exist as minimal elevated instability develops near the nose of the 850 mb jet with lift focused across MN and WI. Instability does not appear strong enough to support severe hail with this elevated activity.
..Jewell/Squitieri.. 02/17/2026
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
Widely scattered areas of low probabilistic potential for thunderstorm development may evolve across the U.S. Wednesday through Wednesday night, but any storms that do form are expected to remain generally weak.
← back to overviewSPC AC 170549
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1149 PM CST Mon Feb 16 2026
Valid 181200Z - 191200Z
NO SEVERE THUNDERSTORM AREAS FORECAST
### SUMMARY
Widely scattered areas of low probabilistic potential for thunderstorm development may evolve across the U.S. Wednesday through Wednesday night, but any storms that do form are expected to remain generally weak.
Discussion
Notable spread persists within the latest model output concerning short wave (and related lower-level) developments within a cyclonic regime evolving inland of the Pacific coast through the Mississippi Valley by Wednesday.
In general, one initial perturbation and associated surface troughing, pivoting through the Upper Midwest and adjacent Great Lakes region by the beginning of this period, are still forecast to undergo substantive weakening Wednesday through Wednesday night. It is possible that a residual area of lower/mid-tropospheric forcing for ascent, coupled with limited moisture return, may maintain sufficient strength to support continuing convective development capable of producing lightning while spreading through the lower Great Lakes vicinity into the day Wednesday. This seems likely to remain rooted above an initially stable boundary layer, with little risk for severe weather before diminishing.
Upstream, another fairly significant short wave perturbation is forecast to accelerate east-northeast of the southern Sierra Nevada, as another digs toward the Oregon/northern California coast. Beneath strong mid-level cooling, models indicate that boundary-layer warming will probably contribute to weak destabilization supportive of convective development across the eastern Great Basin through the mountains of Colorado and Wyoming during the day. It doesn't seem entirely out of the question that some of this activity may become capable of producing lightning, particularly where surface temperatures are able to warm above freezing. However, this probably will remain very sparse in coverage. Otherwise, thunderstorm probabilities marginally sufficient for a categorical thunderstorm area are likely to linger near Pacific coastal areas, mainly from Oregon into and just south of San Francisco Bay.
It does still appear that the short wave trough emerging from the West will support notable cyclogenesis from the lee of the Colorado Rockies into the central Great Plains late Wednesday through Wednesday night. However, low-level flow, above the boundary-layer, across and east of the southern Great Plains is forecast to maintain a pronounced westerly component through the period. Modest inland moisture return off a gradually modifying Gulf boundary layer appears likely to remain focused east of the lower Mississippi Valley, into the Southeast, around the western periphery of low-level ridging centered over the southern mid- to subtropical latitudes of the western Atlantic. It is possible that a weak mid/upper impulse rapidly progressing eastward across parts of the Tennessee Valley and southern Appalachians, and/or low-level warm advection farther west into the vicinity of the confluence of the Mississippi and Ohio Rivers, could support weak thunderstorm development Wednesday night. But, probabilities appear near or below the minimum threshold for a categorical thunder area at the present time.
..Kerr.. 02/17/2026
CLICK TO GET WUUS02 PTSDY2 PRODUCT
NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 1730Z
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 | Thursday, February 19 | 15% |
| Day 5 | Friday, February 20 | predictability too low |
| Day 6 | Saturday, February 21 | predictability too low |
| Day 7 | Sunday, February 22 | potential too low |
| Day 8 | Monday, February 23 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 161000 SPC AC 161000
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0400 AM CST Mon Feb 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Medium-range guidance indicates that a sub-1000 mb surface cyclone, centered across the central Great Plains at the outset of the period, may undergo a period of further deepening as it migrates across and northeast of the lower Missouri Valley, toward the Great Lakes, late Thursday afternoon or evening. Perhaps most notable, latest model output appears a bit more aggressive than last night concerning a corridor of warm sector moisture return into the vicinity of the confluence of the Mississippi and Ohio Rivers. It now appears that this may include surface dew points increasing as high as the upper 50s to lower 60s F by around 20/00Z, which may advect at least a bit further east-northeastward through the lower Ohio Valley, before being cut off later Thursday evening. Though still somewhat modest, and perhaps only supportive of CAPE on the order of 500 J/kg, this probably will be conducive to severe thunderstorm development, in the presence of more than sufficient deep-layer shear and large-scale ascent to support organized convection. This may include supercells with potential to produce tornadoes, and perhaps an upscale growing cluster with strong to severe gusts for a period Thursday evening.
It appears that this cyclone will weaken substantively across the Great Lakes region on Friday, with renewed cyclogenesis possible to the east of the Blue Ridge, or perhaps primarily offshore of the Mid Atlantic coast. So, while increasing low-level moisture return may continue into the warm sector across parts of the Southeast and Mid Atlantic, the extent to which mid/upper support remains conducive to severe weather potential remains unclear.
By late this coming weekend into at least next Monday, convective potential appears likely to diminish as large-scale mid/upper ridging expands across and east of the Rockies toward the Atlantic Seaboard.
..Kerr.. 02/16/2026
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 | Thursday, February 19 | 15% |
| Day 5 | Friday, February 20 | predictability too low |
| Day 6 | Saturday, February 21 | predictability too low |
| Day 7 | Sunday, February 22 | potential too low |
| Day 8 | Monday, February 23 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 161000 SPC AC 161000
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0400 AM CST Mon Feb 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Medium-range guidance indicates that a sub-1000 mb surface cyclone, centered across the central Great Plains at the outset of the period, may undergo a period of further deepening as it migrates across and northeast of the lower Missouri Valley, toward the Great Lakes, late Thursday afternoon or evening. Perhaps most notable, latest model output appears a bit more aggressive than last night concerning a corridor of warm sector moisture return into the vicinity of the confluence of the Mississippi and Ohio Rivers. It now appears that this may include surface dew points increasing as high as the upper 50s to lower 60s F by around 20/00Z, which may advect at least a bit further east-northeastward through the lower Ohio Valley, before being cut off later Thursday evening. Though still somewhat modest, and perhaps only supportive of CAPE on the order of 500 J/kg, this probably will be conducive to severe thunderstorm development, in the presence of more than sufficient deep-layer shear and large-scale ascent to support organized convection. This may include supercells with potential to produce tornadoes, and perhaps an upscale growing cluster with strong to severe gusts for a period Thursday evening.
It appears that this cyclone will weaken substantively across the Great Lakes region on Friday, with renewed cyclogenesis possible to the east of the Blue Ridge, or perhaps primarily offshore of the Mid Atlantic coast. So, while increasing low-level moisture return may continue into the warm sector across parts of the Southeast and Mid Atlantic, the extent to which mid/upper support remains conducive to severe weather potential remains unclear.
By late this coming weekend into at least next Monday, convective potential appears likely to diminish as large-scale mid/upper ridging expands across and east of the Rockies toward the Atlantic Seaboard.
..Kerr.. 02/16/2026
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 | Thursday, February 19 | 15% |
| Day 5 | Friday, February 20 | predictability too low |
| Day 6 | Saturday, February 21 | predictability too low |
| Day 7 | Sunday, February 22 | potential too low |
| Day 8 | Monday, February 23 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 161000 SPC AC 161000
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0400 AM CST Mon Feb 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Medium-range guidance indicates that a sub-1000 mb surface cyclone, centered across the central Great Plains at the outset of the period, may undergo a period of further deepening as it migrates across and northeast of the lower Missouri Valley, toward the Great Lakes, late Thursday afternoon or evening. Perhaps most notable, latest model output appears a bit more aggressive than last night concerning a corridor of warm sector moisture return into the vicinity of the confluence of the Mississippi and Ohio Rivers. It now appears that this may include surface dew points increasing as high as the upper 50s to lower 60s F by around 20/00Z, which may advect at least a bit further east-northeastward through the lower Ohio Valley, before being cut off later Thursday evening. Though still somewhat modest, and perhaps only supportive of CAPE on the order of 500 J/kg, this probably will be conducive to severe thunderstorm development, in the presence of more than sufficient deep-layer shear and large-scale ascent to support organized convection. This may include supercells with potential to produce tornadoes, and perhaps an upscale growing cluster with strong to severe gusts for a period Thursday evening.
It appears that this cyclone will weaken substantively across the Great Lakes region on Friday, with renewed cyclogenesis possible to the east of the Blue Ridge, or perhaps primarily offshore of the Mid Atlantic coast. So, while increasing low-level moisture return may continue into the warm sector across parts of the Southeast and Mid Atlantic, the extent to which mid/upper support remains conducive to severe weather potential remains unclear.
By late this coming weekend into at least next Monday, convective potential appears likely to diminish as large-scale mid/upper ridging expands across and east of the Rockies toward the Atlantic Seaboard.
..Kerr.. 02/16/2026
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 | Thursday, February 19 | 15% |
| Day 5 | Friday, February 20 | predictability too low |
| Day 6 | Saturday, February 21 | predictability too low |
| Day 7 | Sunday, February 22 | potential too low |
| Day 8 | Monday, February 23 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 161000 SPC AC 161000
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0400 AM CST Mon Feb 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Medium-range guidance indicates that a sub-1000 mb surface cyclone, centered across the central Great Plains at the outset of the period, may undergo a period of further deepening as it migrates across and northeast of the lower Missouri Valley, toward the Great Lakes, late Thursday afternoon or evening. Perhaps most notable, latest model output appears a bit more aggressive than last night concerning a corridor of warm sector moisture return into the vicinity of the confluence of the Mississippi and Ohio Rivers. It now appears that this may include surface dew points increasing as high as the upper 50s to lower 60s F by around 20/00Z, which may advect at least a bit further east-northeastward through the lower Ohio Valley, before being cut off later Thursday evening. Though still somewhat modest, and perhaps only supportive of CAPE on the order of 500 J/kg, this probably will be conducive to severe thunderstorm development, in the presence of more than sufficient deep-layer shear and large-scale ascent to support organized convection. This may include supercells with potential to produce tornadoes, and perhaps an upscale growing cluster with strong to severe gusts for a period Thursday evening.
It appears that this cyclone will weaken substantively across the Great Lakes region on Friday, with renewed cyclogenesis possible to the east of the Blue Ridge, or perhaps primarily offshore of the Mid Atlantic coast. So, while increasing low-level moisture return may continue into the warm sector across parts of the Southeast and Mid Atlantic, the extent to which mid/upper support remains conducive to severe weather potential remains unclear.
By late this coming weekend into at least next Monday, convective potential appears likely to diminish as large-scale mid/upper ridging expands across and east of the Rockies toward the Atlantic Seaboard.
..Kerr.. 02/16/2026
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 | Thursday, February 19 | 15% |
| Day 5 | Friday, February 20 | predictability too low |
| Day 6 | Saturday, February 21 | predictability too low |
| Day 7 | Sunday, February 22 | potential too low |
| Day 8 | Monday, February 23 | potential too low |
← back to overviewZCZC SPCSWOD48 ALL ACUS48 KWNS 161000 SPC AC 161000
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0400 AM CST Mon Feb 16 2026
Valid 191200Z - 241200Z
DISCUSSION
Medium-range guidance indicates that a sub-1000 mb surface cyclone, centered across the central Great Plains at the outset of the period, may undergo a period of further deepening as it migrates across and northeast of the lower Missouri Valley, toward the Great Lakes, late Thursday afternoon or evening. Perhaps most notable, latest model output appears a bit more aggressive than last night concerning a corridor of warm sector moisture return into the vicinity of the confluence of the Mississippi and Ohio Rivers. It now appears that this may include surface dew points increasing as high as the upper 50s to lower 60s F by around 20/00Z, which may advect at least a bit further east-northeastward through the lower Ohio Valley, before being cut off later Thursday evening. Though still somewhat modest, and perhaps only supportive of CAPE on the order of 500 J/kg, this probably will be conducive to severe thunderstorm development, in the presence of more than sufficient deep-layer shear and large-scale ascent to support organized convection. This may include supercells with potential to produce tornadoes, and perhaps an upscale growing cluster with strong to severe gusts for a period Thursday evening.
It appears that this cyclone will weaken substantively across the Great Lakes region on Friday, with renewed cyclogenesis possible to the east of the Blue Ridge, or perhaps primarily offshore of the Mid Atlantic coast. So, while increasing low-level moisture return may continue into the warm sector across parts of the Southeast and Mid Atlantic, the extent to which mid/upper support remains conducive to severe weather potential remains unclear.
By late this coming weekend into at least next Monday, convective potential appears likely to diminish as large-scale mid/upper ridging expands across and east of the Rockies toward the Atlantic Seaboard.
..Kerr.. 02/16/2026
CLICK TO GET WUUS48 PTSD48 PRODUCT
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