SPC Convective Outlook Day 1

See Product Description

265
ACUS01 KWNS 290048
SWODY1
SPC AC 290047

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0647 PM CST Wed Jan 28 2026

Valid 290100Z - 291200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not forecast through tonight.

...Discussion...
The prevalence of cold/continental trajectories, especially east of
the Rockies, will preclude thunderstorm development through tonight.

..Guyer.. 01/29/2026

$$

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

840
FLUS43 KLOT 290244
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
844 PM CST Wed Jan 28 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-300245-
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-
844 PM CST Wed Jan 28 2026 /944 PM EST Wed Jan 28 2026/

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

.DAY ONE...Tonight.

Weather hazards expected...

Limited Excessive Cold Risk.

DISCUSSION...

Wind chills 10 below to 20 below zero will occur late tonight
into early Thursday morning.

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

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
Limited Excessive Cold Risk.
Friday and Saturday...
Limited Excessive Cold Risk.
Elevated Snow Risk Near Lake Michigan.
Sunday Night and Monday...
Limited Snow Risk.

DISCUSSION...

Accumulating lake effect snow is expected near Lake Michigan
early Friday morning through Saturday night. Periods of
significantly-impacted travel appear increasingly likely. Several
inches of accumulation will be possible for some, especially
around parts of northwest Indiana. There remains uncertainty
regarding timing, intensity, and the placement of the heaviest
lake effect snow and greatest impacts at this time.

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

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

$$

LMZ740>745-300245-
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-
844 PM CST Wed Jan 28 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...Thursday through Tuesday.

Friday and Saturday...
Hazardous conditions for small craft are likely.

$$

Yack

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

See Product Description

734
ACUS02 KWNS 281610
SWODY2
SPC AC 281608

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1008 AM CST Wed Jan 28 2026

Valid 291200Z - 301200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorm probabilities across the U.S. appear less than 10
percent for Thursday through Thursday night.

...Discussion...
Models indicate that mid/upper ridging will build inland of the
Pacific coast, across the Sierra Nevada through the Canadian Rockies
and western Prairies, through this period. As this occurs, a series
of short wave perturbations emerging from evolving large-scale
upstream troughing are forecast to approach the British
Columbia/Pacific Northwest, within deep-layer southwesterly flow.
Continuing low/mid-level moisture return is likely to support
another round of precipitation with an inland migrating baroclinic
wave. However, beneath relatively warm mid/upper levels, saturating
thermodynamic profiles appear unlikely to become supportive of
thunderstorm development.

Meanwhile, an inland migrating short wave trough, preceding the
building ridge, is forecast to dig across the Great Basin and
Rockies, through the south central Great Plains and lower
Mississippi Valley by late Thursday night, as a much more prominent
short wave trough pivoting southwest of Hudson Bay progresses across
the international border into the Upper Midwest. Beneath a
confluent regime in the wake of the latter perturbation, it appears
that another cold surface ridge will begin building across the
international border through the northern Great Plains and upper
Mississippi Valley. In advance of the perturbation emerging from
the West, a weak developing lee surface low may be maintained across
the Red River and lower Mississippi Valleys, while perhaps another
weak wave develops along a remnant preceding frontal zone across the
northwestern Gulf Basin. However, models indicate that western Gulf
boundary-layer modification and inland moisture return will be quite
limited, with little potential for destabilization supportive of an
appreciable risk for thunderstorm activity.

..Kerr.. 01/28/2026

$$

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

254
ACUS03 KWNS 281820
SWODY3
SPC AC 281819

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
1219 PM CST Wed Jan 28 2026

Valid 301200Z - 311200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorm probabilities across the U.S. for Friday through Friday
night appear less than 10 percent.

...Discussion...
Models indicate that large-scale mid-level ridging will generally be
maintained across the U.S. Pacific coast through Rockies, with short
wave ridging also building along the British Columbia coast, in the
wake of a short wave trough progressing inland across the Canadian
and adjacent northern U.S. Rockies. Precipitation accompanying an
associated baroclinic zone may linger into Friday across the Pacific
Northwest, with perhaps an upstream warm frontal band also
approaching coastal Washington by late Friday night. However,
forecast soundings suggest that thermodynamic profiles will not
become sufficiently unstable to support an appreciable risk for
thunderstorm activity.

Downstream, several short wave perturbations, including one vigorous
impulse emerging from the Hudson Bay vicinity, are forecast to
consolidate into amplifying, positively tilted large-scale troughing
across much of the lower Mississippi Valley and Gulf Basin through
southern Atlantic Seaboard by late Friday night. There remains
notable spread concerning associated surface cyclogenesis, but it
appears that this will remain weak across the eastern Gulf and
adjacent Southeast, before undergoing notable strengthening offshore
of the southern/mid Atlantic coast after 12Z Saturday. Along and
south of a strengthening frontal zone, a deepening moist
boundary-layer may become conditionally unstable across parts of the
Florida Keys and southeastern Florida Peninsula by Friday. However,
forecast soundings indicate that relatively warm and dry air in
mid/upper levels will tend to suppress thunderstorm development.

..Kerr.. 01/28/2026

$$

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

See Product Description

No active Winter Weather Statement for DuPage County.

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.