SPC Convective Outlook Day 1

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671
ACUS01 KWNS 250051
SWODY1
SPC AC 250049

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0649 PM CST Sat Jan 24 2026

Valid 250100Z - 251200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

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

...01z Update...

Southern-stream upper low is beginning to eject across northern
Mexico. Latest water-vapor imagery depicts this feature well and
scattered thunderstorms have developed ahead of the primary midlevel
vort just south of the international border. Isolated thunderstorms
are noted north of the border across southeast AZ, but this activity
should gradually weaken over the next few hours. However, stronger
forcing is expected to aid elevated convection that will spread
across portions of far West TX this evening and thunderstorm
probabilities will reflect this risk through at least 06z tonight.
Downstream, warm advection will continue to be the primary mechanism
for more sporadic thunderstorms atop the cooler polar air mass.
Additionally, boundary layer destabilization will be retarded across
the lower MS Valley through 12z, and for this reason robust
thunderstorms are not forecast.

..Darrow.. 01/25/2026

$$

The "Convective Outlooks" issued by SPC can be thought of as a detailed discussion of the Severe Thunderstorm threat and it's associated risks nationwide. Risk levels range from Marginal to Slight, Enhanced, Moderate, and High and are issued based on the likelihood of 3 major severe weather threats; the risk of tornadoes, damaging winds, and hail. These discussions are often heavily laced meteorological terminology that may be difficult to understand without a background in the field. However understanding these discussions shouldn't be thought of as necessary. Instead, should DuPage county fall under one of these threat levels for severe weather, the response should be to have a heightened level of awareness about the deveoloping weather. Keep an eye on the "Watch County Notification" for any active severe weather watches issued for DuPage county; the "Hazardous Weather Outlook" and "Severe Weather Statement" can also be helpful in explaining the developing risk; additionally, watch for "Active Weather Warnings" and keep an eye on our "Regional Satellite and Radar" products which can be viewed with active watches/warnings or lightning activity.

Hazardous Weather Outlook

See Product Description

629
FLUS43 KLOT 242054
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
254 PM CST Sat Jan 24 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-252100-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
254 PM CST Sat Jan 24 2026 /354 PM EST Sat Jan 24 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Snow Risk.

DISCUSSION...

Accumulating snow will result in hazardous travel tonight, mainly
near and south of I-55 and I-80.

Extensive ice cover on area rivers may cause localized ice jam
flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Elevated Snow Risk.
Sunday night and Monday morning...
Elevated Excessive Cold Risk.
Wednesday...
Limited Snow Risk.
Wednesday night through Friday morning...
Limited Excessive Cold Risk.

DISCUSSION...

Accumulating snow and hazardous travel conditions will continue
on Sunday, especially southeast of a Peru to Waukegan, Illinois
line.

Wind chills to around 20 below zero are expected late Sunday
night into Monday morning.

Extensive ice cover on area rivers may cause localized ice jam
flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

$$

LMZ740>745-252100-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
254 PM CST Sat Jan 24 2026

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday through Thursday...
Hazardous conditions for small craft are likely at times.

$$

- Izzi

Visit us at www.weather.gov/chicago

The "Hazardous Weather Outlook" contains information regarding any and all weather expected to occur within the region that could be hazardous to travel, life or property. This is one of our most highly recommended products to check on a daily basis, and it some cases multiple times per day should significant weather be expected to affect DuPage county.

SPC Convective Outlook Day 2

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921
ACUS02 KWNS 241722
SWODY2
SPC AC 241720

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1120 AM CST Sat Jan 24 2026

Valid 251200Z - 261200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF FAR
SOUTHEAST MISSISSIPPI INTO SOUTHERN ALABAMA...SOUTHERN GEORGIA...AND
THE WESTERN FLORIDA PANHANDLE...

...SUMMARY...
Severe thunderstorms are possible across parts of the eastern Gulf
Coast states Sunday morning and afternoon. Damaging gusts and a few
tornadoes are the main concerns.

...Synopsis...
A surface low will traverse the Gulf Coast states tomorrow (Sunday)
morning and early afternoon, before ejecting northeast toward the
Mid Atlantic as a mid-level trough deepens east of the MS River. A
constrained warm sector will become established ahead of a
progressive surface cold front and south of a warm front over
southeast MS into southern AL/GA during the morning/early afternoon
hours. Strong flow aloft will overspread this warm sector, resulting
in enough overlapping buoyancy and vertical wind shear to support a
severe threat along the Gulf Coast.

...Southeast Gulf Coast States...
Thunderstorms should be ongoing at the start of the period (12Z
Sunday) across parts of LA/MS, and should begin focusing into a
linear band along/immediately ahead of a cold front with the
development of the surface low. A warm front will be positioned
somewhere over the southern third of AL/MS Sunday morning,
delineating the warm sector to the south, characterized by mid to
upper 60s F surface temperatures and mid 60s F dewpoints.
Tropospheric lapse rates should be meager though (i.e. 5.5-6 C/km),
resulting in thin buoyancy profiles. However, nearly 100 kt
west-southwesterly 500 mb flow atop a 60+ kt southwesterly low-level
jet overspreading the warm front (with locally backed winds) will
support large, elongated hodographs with at least modest low-level
curvature. As such, a high shear/low-CAPE parameter space will
precede an intensifying QLCS through Sunday morning/early afternoon
across southeast MS into southern AL and GA, where and when the
severe threat is expected to be greatest.

While strong linear forcing will support a QLCS, minimal MLCINH
ahead of the front suggests that a couple of low-topped supercells
cannot be ruled out. While MLCAPE may struggle to exceed 500 J/kg
over most locales, widespread 60+ kts of effective bulk shear and
400+ m2/s2 0-3 km SRH should support some threat for damaging gusts
and at least a few tornadoes. The best chance for tornadoes will be
with storms interacting with the warm front, where low-level
hodograph curvature will be maximized. If a sustained supercell
manages to develop, a strong tornado cannot be ruled out as the
storm crosses the warm front. Later Sunday afternoon, the surface
low and forcing for ascent will drift away from the warm sector.
With a wedge front also expected to stall warm sector recovery from
central GA north/northeastward, the severe threat should wane
through the day.

..Squitieri.. 01/24/2026

$$

The "Convective Outlooks" issued by SPC can be thought of as a detailed discussion of the Severe Thunderstorm threat and it's associated risks nationwide. Risk levels range from Marginal to Slight, Enhanced, Moderate, and High and are issued based on the likelihood of 3 major severe weather threats; the risk of tornadoes, damaging winds, and hail. These discussions are often heavily laced meteorological terminology that may be difficult to understand without a background in the field. However understanding these discussions shouldn't be thought of as necessary. Instead, should DuPage county fall under one of these threat levels for severe weather, the response should be to have a heightened level of awareness about the deveoloping weather. Keep an eye on the "Watch County Notification" for any active severe weather watches issued for DuPage county; the "Hazardous Weather Outlook" and "Severe Weather Statement" can also be helpful in explaining the developing risk; additionally, watch for "Active Weather Warnings" and keep an eye on our "Regional Satellite and Radar" products which can be viewed with active watches/warnings or lightning activity.

SPC Convective Outlook Day 3

See Product Description

041
ACUS03 KWNS 241859
SWODY3
SPC AC 241858

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
1258 PM CST Sat Jan 24 2026

Valid 261200Z - 271200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms appear unlikely Monday.

...Synopsis...
A mid-level trough will eject into the Atlantic on Monday, resulting
in widespread surface high pressure and an accompanying polar
airmass to overspread the CONUS, diminishing thunderstorm potential.
A surface cold front will sweep across the central and southern FL
Peninsula Monday morning and afternoon. While a thunderstorm or two
cannot be ruled, deep-layer ascent will remain primarily north of
the state, which will limit thunderstorm development, warranting the
withholding of thunderstorm probabilities this outlook.

..Squitieri.. 01/24/2026

$$

The "Convective Outlooks" issued by SPC can be thought of as a detailed discussion of the Severe Thunderstorm threat and it's associated risks nationwide. Risk levels range from Marginal to Slight, Enhanced, Moderate, and High and are issued based on the likelihood of 3 major severe weather threats; the risk of tornadoes, damaging winds, and hail. These discussions are often heavily laced meteorological terminology that may be difficult to understand without a background in the field. However understanding these discussions shouldn't be thought of as necessary. Instead, should DuPage county fall under one of these threat levels for severe weather, the response should be to have a heightened level of awareness about the deveoloping weather. Keep an eye on the "Watch County Notification" for any active severe weather watches issued for DuPage county; the "Hazardous Weather Outlook" and "Severe Weather Statement" can also be helpful in explaining the developing risk; additionally, watch for "Active Weather Warnings" and keep an eye on our "Regional Satellite and Radar" products which can be viewed with active watches/warnings or lightning activity.

Special Weather Statement

See Product Description

No active Special Weather Statement for DuPage County.

The "Special Weather Statement" details notable weather either occuring or expected to occur, but does not necessarily have to be considered severe or hazardous. This is a supplementary product issued by the National Weather Service to help describe noteworthy weather. It's terminology should be reasonably easy to understand by the general public.

Watch County Notification

See Product Description

No active Watch County Notification for DuPage County.

The "Watch County Notification" will contain updates regarding active severe weather watches that pertain to DuPage county. This may be for a newly issued watch, or the cancelation of an existing watch. Severe weather watches come in two forms; Severe Thunderstorm and Tornado, and it should be noted that a Severe Thunderstorm Watch does NOT rule out the possibility of tornadoes occuring. It generally means that the tornado threat is minimal while damaging winds and hail are still likely. See our "Watch, Warning, and Advisory Criteria" for more detailed information on the differences and critera for watches, warnings and advisory for all forms of weather.

Winter Weather Statement

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034
WWUS43 KLOT 250140
WSWLOT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Chicago IL
740 PM CST Sat Jan 24 2026

ILZ006-103-104-251145-
/O.CON.KLOT.WW.Y.0005.000000T0000Z-260126T0000Z/
Lake IL-Northern Cook-Central Cook-
Including the cities of Schaumburg, Northbrook, Oak Lawn,
Mundelein, Palatine, Waukegan, Gurnee, Des Plaines, Oak Park,
Evanston, La Grange, Chicago, Cicero, and Buffalo Grove
740 PM CST Sat Jan 24 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST SUNDAY...

* WHAT...Hazardous travel conditions due to snow occurring.

* WHERE...Central Cook, Lake IL, and Northern Cook Counties.

* WHEN...Until 6 PM CST Sunday.

* IMPACTS...Roads, bridges, and overpasses, will be slick and
hazardous. Visibility may occasionally drop below 1 mile,
particularly during the day on Sunday.

* ADDITIONAL DETAILS...Steady snow overnight will transition into
localized lake effect snow by daybreak Sunday. As a result, total
snow accumulations will vary across the impacted counties with
around an inch near and west of Interstate 94/294, and localized
totals up to 6 inches along the immediate Lake Michigan shoreline.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving. If you are going outside,
watch your first few steps taken on stairs, sidewalks, and driveways.

&&

$$

ILZ013-019>021-023-032-033-039-105>108-251145-
/O.CON.KLOT.WW.Y.0005.000000T0000Z-260126T0000Z/
DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Southern Cook-Northern Will-Southern Will-Eastern Will-
Including the cities of Minooka, Plano, Bradley, Joliet,
Kankakee, Fairbury, Mendota, Orland Park, Naperville, La Salle,
Wheaton, Bolingbrook, Ottawa, Bourbonnais, Coal City, Plainfield,
Mokena, Wilmington, Pontiac, Paxton, Calumet City, Dwight,
Marseilles, Gilman, Gibson City, Oswego, Beecher, Carol Stream,
Morris, Oak Forest, Crete, Downers Grove, Manhattan, Yorkville,
Streator, Lombard, Lemont, Watseka, Channahon, Peotone, and Park
Forest
740 PM CST Sat Jan 24 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST SUNDAY...

* WHAT...Hazardous travel conditions due to snow occurring.

* WHERE...Portions of central, east central, north central, and
northeast Illinois.

* WHEN...Until 6 PM CST Sunday.

* IMPACTS...Roads, bridges, and overpasses, will be slick and
hazardous.

* ADDITIONAL DETAILS...Total snow accumulations will range from
around an inch or two near the Interstate 88 and 80 corridors to 4
to 7 inches near US 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving. If you are going outside,
watch your first few steps taken on stairs, sidewalks, and driveways.

&&

$$

INZ001-002-251145-
/O.CON.KLOT.WW.Y.0005.000000T0000Z-260126T0600Z/
Lake IN-Porter-
Including the cities of Chesterton, Valparaiso, Hammond,
Merrillville, Portage, and Gary
740 PM CST Sat Jan 24 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
SUNDAY NIGHT...

* WHAT...Hazardous travel conditions due to snow occurring.

* WHERE...Lake IN and Porter Counties.

* WHEN...Until midnight CST Sunday Night.

* IMPACTS...Roads, bridges, and overpasses, will be slick and
hazardous, including the Interstate 80, 90, and 94 corridor.
Visibility may occasionally drop below 1 mile, particularly Sunday
afternoon.

* ADDITIONAL DETAILS...Steady snow overnight will transition into
localized lake effect snow Sunday afternoon. Total snow
accumulations will range from around 3 inches near the Kankakee
River Valley to locally 6 inches within a few miles of the Lake
Michigan shoreline.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving. If you are going outside,
watch your first few steps taken on stairs, sidewalks, and driveways.

&&

$$

INZ010-011-019-251145-
/O.CON.KLOT.WW.Y.0005.000000T0000Z-260126T0300Z/
Newton-Jasper-Benton-
Including the cities of Kentland, Roselawn, Rensselaer, DeMotte,
Morocco, Oxford, and Fowler
740 PM CST Sat Jan 24 2026 /840 PM EST Sat Jan 24 2026/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 PM CST /10 PM
EST/ SUNDAY...

* WHAT...Hazardous travel conditions due to snow occurring.

* WHERE...Benton, Jasper, and Newton Counties.

* WHEN...Until 9 PM CST /10 PM EST/ Sunday.

* IMPACTS...Roads, bridges, and overpasses, will be slick and
hazardous.

* ADDITIONAL DETAILS...Total snow accumulations will range from 3 to
6 inches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving. If you are going outside,
watch your first few steps taken on stairs, sidewalks, and driveways.

&&

$$

Borchardt

The "Winter Weather Statement" is a product aimed at the general public that will discuss impacts caused by winter weather. This may include information about watches, warnings and advisories as well as details about impactful winter weather that may not warrant the issuance of a watch, warning or advisory.

Severe Weather Statement

See Product Description

No active Severe Weather Statement for DuPage County.

The "Severe Weather Statement" is a product aimed at the general public that will discuss impacts caused by severe thunderstorms. This may include information about watches and warnings as well as details about impactful "sub-severe" weather that may not warrant the issuance of a watch or warning which sometimes may come when a watch or warning has been canceled.

Non-Precip Statement

See Product Description

No active Non-Precip Statement for DuPage County.

The "Non-Precip Statement" is aimed at the general public and will detail notable weather that is either occuring or expected to occur, but does not relate to any form of precipitation. These would include but are not limited to high winds, reduced visibility or extreme temperatures.

Active Weather Warnings

Tornado Warnings

No active Tornado Warnings.

Severe Thunderstorm Warnings

No active Severe Thunderstorm Warnings.

Flood Warnings

No active Flood Warnings.

General Tornado/Severe Weather Safety

1. A Tornado or Severe Thunderstorm Warning is issued when it has been reported, or when it has been detected via National Weather Service radar. It is to be interpreted that this event is occuring and is expected to affect all warned areas. Those within the warning need to take action immediately.
2. If under a warning remain calm and if it is necessary to seek shelter. Students and Employees should head to their nearest designated shelter area. The route to these shelter areas are posted in all rooms on campus and signs are placed in the hallways to direct you to the nearest shelter area. Review these instructions and be familiar with where your nearest shelter is. Stay indoors, away from windows and large unsupported ceilings. Faculty should account for their students and Supervisors should account for their areas employees.
3. If outside, take shelter in the nearest building.
4. After the storm has passed, dial Police at 911 to report any injuries or damage to buildings.
5. If the building is severely damaged, evacuate the building as soon as possible after the storm has passed.