LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0632 PM CST Wed Feb 04 2026
Valid 050100Z - 051200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorms probabilities across the U.S. appear less than 10
percent tonight.
...01Z Update...
Larger-scale mid-level troughing may take on a bit less of a
positive tilt while approaching the southern Atlantic Seaboard later
tonight, as the most vigorous embedded short wave perturbation
begins to pivot eastward after digging into the northwestern Gulf
coast vicinity. However, colder mid-level temperatures are forecast
to continue to lag to the northwest and west of the associated
surface cold front, which may overspread much of northern Florida
and the west central peninsula by 12Z Thursday. Forecast soundings
suggest that lower/mid-tropospheric moistening and forcing for
large-scale ascent along and ahead of the front may contribute to a
layer of weak destabilization supportive of heavier showers into and
across the Greater Tampa vicinity, and perhaps much of the I-4
corridor, late tonight. However, given relatively warm equilibrium
(and likely cloud top) temperatures, the potential for lightning
appears low.
..Kerr.. 02/05/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TQmP6S
Windy.com Temps | Gusts | WU KORD KPWK |
CLICK for this month's BIG night sky ... | RADAR FULL MAP SCREEN |
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MOBILE DEVICE? Turn sideways. Weather conditions directly above are near Lakefront. Top tabs refer to O'Hare (official).
Archives for the SPC Convective Outlook are updated daily (approximately) with a live map at the beginning of each article. Follow the link at the end of the article to check for current updates on the NOAA/NWS Storm Prediction Center website. Also, see Archives for Chicago's hourly weather data on CARDINAL NEWS Magazine.
CONVECTIVE | TORNADO | WIND | HAIL
O'Hare International Airport KORD
(Arlington Heights South)
Chicago Executive Airport KPWK
(Arlington Heights North)
Wednesday, February 4, 2026
SPC Feb 5, 2026 0100 UTC Day 1 Convective Outlook
SPC Feb 4, 2026 1630 UTC Day 1 Convective Outlook
LIVE MAP (ABOVE) ... SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1029 AM CST Wed Feb 04 2026
Valid 041630Z - 051200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorms are not forecast through tonight.
...Synopsis...
Current satellite imagery shows a shortwave trough extending from
the Lower MO Valley through OK and the TX Panhandle. This shortwave
is forecast to continue progressing southeastward, moving from the
western to southern periphery of the mean upper troughing that
covers much of the eastern CONUS. This progression will deepen the
eastern CONUS troughing, while a Rex Block persists across the
western CONUS. This evolution will yield an strongly amplified upper
pattern over the CONUS by early tomorrow morning.
Surface analysis places a low over the southern Appalachians in
northern GA, with a cold front extending southwestward from this
through the central Gulf Coast. Showers and embedded thunderstorms
precede this front from the FL Panhandle through central and eastern
SC, although most of the lightning is currently offshore. As the
aforementioned shortwave trough continues southeastward, this front
is forecast to surge southeastward as well. Inland buoyancy ahead of
the front will be limited by tempered heating and poor lapse rates,
which is expected to keep any thunderstorm potential offshore for
the remainder of the period.
..Mosier/Thornton.. 02/04/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TQm8yR
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1029 AM CST Wed Feb 04 2026
Valid 041630Z - 051200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorms are not forecast through tonight.
...Synopsis...
Current satellite imagery shows a shortwave trough extending from
the Lower MO Valley through OK and the TX Panhandle. This shortwave
is forecast to continue progressing southeastward, moving from the
western to southern periphery of the mean upper troughing that
covers much of the eastern CONUS. This progression will deepen the
eastern CONUS troughing, while a Rex Block persists across the
western CONUS. This evolution will yield an strongly amplified upper
pattern over the CONUS by early tomorrow morning.
Surface analysis places a low over the southern Appalachians in
northern GA, with a cold front extending southwestward from this
through the central Gulf Coast. Showers and embedded thunderstorms
precede this front from the FL Panhandle through central and eastern
SC, although most of the lightning is currently offshore. As the
aforementioned shortwave trough continues southeastward, this front
is forecast to surge southeastward as well. Inland buoyancy ahead of
the front will be limited by tempered heating and poor lapse rates,
which is expected to keep any thunderstorm potential offshore for
the remainder of the period.
..Mosier/Thornton.. 02/04/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TQm8yR
SPC Feb 4, 2026 1300 UTC Day 1 Convective Outlook
LIVE MAP (ABOVE) ... SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0634 AM CST Wed Feb 04 2026
Valid 041300Z - 051200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not forecast through tonight.
...Synopsis...
Morning surface analysis places a cold front pushing southeast
across the northeast Gulf Coast southwestward through the Gulf of
America. As an upper trough over the lower MO Valley/southern Great
Plains pivots southeast into the central Gulf Coast, it will drive
the front into central portions of the FL Peninsula late tonight.
Scant buoyancy mainly over the FL Panhandle vicinity this morning
may yield a few weak thunderstorms before this activity diminishes
as it moves east into a more stable airmass. Elsewhere, quiescent
conditions for thunderstorms will prevail.
..Smith/Jewell.. 02/04/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TQlnX6
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0634 AM CST Wed Feb 04 2026
Valid 041300Z - 051200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not forecast through tonight.
...Synopsis...
Morning surface analysis places a cold front pushing southeast
across the northeast Gulf Coast southwestward through the Gulf of
America. As an upper trough over the lower MO Valley/southern Great
Plains pivots southeast into the central Gulf Coast, it will drive
the front into central portions of the FL Peninsula late tonight.
Scant buoyancy mainly over the FL Panhandle vicinity this morning
may yield a few weak thunderstorms before this activity diminishes
as it moves east into a more stable airmass. Elsewhere, quiescent
conditions for thunderstorms will prevail.
..Smith/Jewell.. 02/04/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TQlnX6
SPC Feb 4, 2026 0600 UTC Day 1 Convective Outlook
LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1146 PM CST Tue Feb 03 2026
Valid 041200Z - 051200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe storms are not expected today through tonight.
...Synopsis...
Late-evening surface observations show a cold front advancing south
into the northwestern Gulf/lower MS River Valley. This feature is
expected to continue southeastward over the next 24 hours amid
building high pressure across the central CONUS. Despite seasonal
moisture in place along the Gulf Coast, warm mid-level
temperatures/poor lapse rates will largely limit much appreciable
buoyancy. However, forecast soundings suggest sufficient MUCAPE for
isolated thunderstorms may develop within the pre-frontal air mass
by late morning/early afternoon across the northern Gulf into parts
of southern AL and the FL Panhandle. Given the poor thermodynamic
environment, severe/organized convection is not expected, and any
appreciable lightning threat to land should diminish after 00 UTC.
..Moore/Wendt.. 02/04/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TQlQ5w
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1146 PM CST Tue Feb 03 2026
Valid 041200Z - 051200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe storms are not expected today through tonight.
...Synopsis...
Late-evening surface observations show a cold front advancing south
into the northwestern Gulf/lower MS River Valley. This feature is
expected to continue southeastward over the next 24 hours amid
building high pressure across the central CONUS. Despite seasonal
moisture in place along the Gulf Coast, warm mid-level
temperatures/poor lapse rates will largely limit much appreciable
buoyancy. However, forecast soundings suggest sufficient MUCAPE for
isolated thunderstorms may develop within the pre-frontal air mass
by late morning/early afternoon across the northern Gulf into parts
of southern AL and the FL Panhandle. Given the poor thermodynamic
environment, severe/organized convection is not expected, and any
appreciable lightning threat to land should diminish after 00 UTC.
..Moore/Wendt.. 02/04/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TQlQ5w
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CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)
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