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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.

ARLINGTON HEIGHTS WEATHER
O'Hare International Airport KORD (Arlington Heights South)
Chicago Executive Airport KPWK (Arlington Heights North)

Wednesday, January 7, 2026

SPC Jan 7, 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
1017 AM CST Wed Jan 07 2026

Valid 071630Z - 081200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM WEST TEXAS
INTO CENTRAL OKLAHOMA...

...SUMMARY...
Marginally severe storms are possible from late tonight into the
early morning on Thursday from parts of west and northwest Texas
northeastward into Oklahoma.

...Southwest TX into Central OK...
Water-vapor imagery this morning shows a mid-level shortwave trough
immediately west of Baja California while a progressive flow regime
prevails across the northern half of the Lower 48. The
aforementioned upper disturbance is forecast to quickly move east
across the Sonoran and Chihuahuan deserts and into west/northwest TX
by early Thursday morning.

A reservoir of partially modified Gulf moisture (60s deg F surface
dewpoints) resides over the coastal plain of TX this morning. As
the upper trough approaches the southern Great Plains tonight,
strengthening low-level flow will advect this moisture northwestward
into parts of northwest TX into central OK during the 08-12 UTC
period. Although the primary cyclone will remain near the
CO-NM-OK-KS-TX border region while deepening considerably, the
attendant warm front will serve as the main low-level feature of
interest. Warm advection/isentropic lift will favor isolated to
scattered showers and thunderstorms developing late tonight over
west into northwest TX and eventually into central OK. Model-based
soundings imply elevated parcels and MUCAPE ranging from 500-1000
J/kg amidst strong deep-layer shear. An isolated risk for large
hail may accompany the stronger storms along with the possibility of
localized severe gusts.

..Smith/Wendt.. 01/07/2026


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TQCdM1

SPC Jan 7, 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
1136 PM CST Tue Jan 06 2026

Valid 071200Z - 081200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE SOUTHERN PLAINS...

...SUMMARY...
Marginally severe storms are possible from late tonight into the
early morning on Thursday from parts of west and northwest Texas
northeastward into Oklahoma.

...West and Northwest Texas/Oklahoma...
A mid-level trough will move quickly east-northeastward from the
eastern Pacific this morning to the southern Plains tonight. Ahead
of the system, a lee surface trough will develop across the High
Plains, as winds become south to southeasterly over much of the
southern Plains. In response, moisture advection will increase over
the southern Plains, as a moist airmass spreads northwestward into
parts of west-central and north-central Texas by midnight. Along the
northwestern edge of this airmass, low-level convergence is forecast
to increase after midnight, which will aid scattered thunderstorm
development during the overnight period. Instability along a
southwest-to-northeast corridor is forecast to remain weak, with
MLCAPE peaking around 500 J/kg. In addition, a low-level capping
inversion just the east of the instability axis will keep much of
the convection elevated. In spite of these negative factors,
effective shear will be in the 40 to 50 knot range, and 700-500 mb
lapse rates are forecast to be between 7.5 and 8 C/km. This
environment could support a marginal severe threat with cells that
rotate. Hail and isolated severe wind gusts will be possible, mainly
in the 08Z to 12Z timeframe.

..Broyles/Squitieri.. 01/07/2026


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TQBxlG

Tuesday, January 6, 2026

SPC Jan 6, 2026 2000 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 2000Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0143 PM CST Tue Jan 06 2026

Valid 062000Z - 071200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not expected through tonight.

...20Z Update...
No changes to the ongoing forecast.

..Wendt.. 01/06/2026

.PREV DISCUSSION... /ISSUED 1017 AM CST Tue Jan 06 2026/

...Discussion...
A progressive upper-flow pattern will continue over the CONUS with
some amplification occurring through tonight within split flow over
the West. Convective potential will be essentially nil over the
CONUS.

A southern-stream shortwave trough off the coast of California will
spread southeastward toward Baja, with any related
thunderstorm-conducive environment expected to remain well offshore.
Multiple shortwave troughs will cross or approach the Pacific
Northwest tonight. Cooling mid-level temperatures may contribute to
weak buoyancy and some potential for a few lightning flashes, but
such potential is likely to remain below 10 percent.


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TQBnBS

SPC Jan 6, 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
1017 AM CST Tue Jan 06 2026

Valid 061630Z - 071200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not expected through tonight.

...Discussion...
A progressive upper-flow pattern will continue over the CONUS with
some amplification occurring through tonight within split flow over
the West. Convective potential will be essentially nil over the
CONUS.

A southern-stream shortwave trough off the coast of California will
spread southeastward toward Baja, with any related
thunderstorm-conducive environment expected to remain well offshore.
Multiple shortwave troughs will cross or approach the Pacific
Northwest tonight. Cooling mid-level temperatures may contribute to
weak buoyancy and some potential for a few lightning flashes, but
such potential is likely to remain below 10 percent.

..Guyer/Moore.. 01/06/2026


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TQBWYZ
SUNRISE AND SUNSET TIMES IN UTC (if you're not logged in to Google)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)