SPC Convective Outlook Day 1

See Product Description

000
ACUS01 KWNS 060506
SWODY1
SPC AC 060505

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1105 PM CST Thu Feb 05 2026

Valid 061200Z - 071200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorm probabilities will remain generally near or below 10
percent across the U.S. today through tonight.

...Discussion...
While a blocking high centered inland of the U.S. Pacific coast
becomes increasingly suppressed, it appears that large-scale ridging
will be maintained across the Pacific coast through the Canadian
Prairies and U.S. Great Plains. Some expansion east of the Canadian
Prairies and northern U.S. Great Plains is possible, but a vigorous
short wave trough of Arctic origins likely will reinforce amplified
larger-scale mid-level troughing across and east of the Atlantic
Seaboard, as it digs south-southeast of the Great Lakes through Mid
Atlantic region today through tonight. Beneath a confluent
mid-level regime in the wake of this feature, cold surface ridging
is forecast to build across the Mississippi Valley through
Appalachians vicinity, with the leading edge of the reinforcing cold
intrusion advancing as far south as the Florida peninsula and
northeastern Gulf Basin through central Texas by 12Z Saturday.

Near and inland of the southern California through Baja coast, broad
weak mid-level troughing is forecast to linger and become reinforced
by a digging short wave perturbation emerging from the upstream
southern mid-latitude Pacific. Models indicate that this may
include the evolution of a notable mid-level low, which probably
will remain offshore of the southern California and northern Baja
coast through this period.

...Southwest...
Models suggest that modest moisture return off the subtropical
eastern Pacific, coincident with steepening lapse rates aided by
mid-level cooling, will contribute to weak destabilization across
parts of California into the Great Basin today through tonight.
With the evolving low and associated coldest mid-level temperatures
forecast to remain offshore, forcing to support convective
development inland remains unclear. Spread among the model output
adds to the uncertainty.

Orographic forcing might contribute to potential for thunderstorm
development with sufficient boundary-layer destabilization, and
there appears a consensus among the various ensemble calibrated
thunderstorm guidance for minimum threshold thunderstorm
probabilities across at least western portions of the Transverse
Ranges of southern California. Eastward into the San Gabriel
Mountains, and northward into portions of the southern Sierra
Nevada, thunderstorm probabilities appear a bit less at this time.

..Kerr.. 02/06/2026

$$

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

080
FLUS43 KLOT 060959
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
359 AM CST Fri Feb 6 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-071000-
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-
359 AM CST Fri Feb 6 2026 /459 AM EST Fri Feb 6 2026/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Snow Risk.
Very Limited Ice Accumulation Risk.

DISCUSSION...

Burst of snow this morning will result in quick accumulations on
roads and cause slippery travel especially east of a Rockford to
Kankakee to Fowler line. Behind the snow there is a slight chance
of a very brief period of light freezing drizzle this morning.

A period of lake effect snow showers is expected tonight into
early Saturday morning in northwest Indiana, mainly eastern Porter
County. Snow accumulations locally around an inch are possible and
could result in slippery travel.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

$$

LMZ740>745-071000-
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-
359 AM CST Fri Feb 6 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...Today and Tonight.

Weather hazards expected...

Gale force winds and or very hazardous waves.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Hazardous conditions for small craft are likely.
Tuesday through Thursday...
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

156
ACUS02 KWNS 060531
SWODY2
SPC AC 060530

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1130 PM CST Thu Feb 05 2026

Valid 071200Z - 081200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not forecast on Saturday or Saturday night.

...Synopsis...

An upper ridge will envelop much of the western two-thirds of the
CONUS on Saturday, though an embedded southern stream shortwave
trough will develop east across portions of northwest Mexico and the
Southwest. Meanwhile, an upper ridge will move offshore the Atlantic
coast through early Sunday. At the surface, Gulf moisture will
remain cut-off as high pressure persists over the eastern half of
the CONUS. After 00z, weak surface lee troughing across the High
Plains will allow for modest south/southeasterly return flow to
spread across the western Gulf and the southern Plains. Some minor
increase in boundary-layer moisture will occur over south TX,
however this moisture is expected to remain shallow and
thunderstorms are not expected given weak forcing and warm midlevel
temperatures.

..Leitman.. 02/06/2026

$$

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

213
ACUS03 KWNS 060656
SWODY3
SPC AC 060655

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
1255 AM CST Fri Feb 06 2026

Valid 081200Z - 091200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not expected on Sunday.

...Arizona/New Mexico...

An upper shortwave trough within southern stream flow will move
across northern Mexico on Sunday. Increasing midlevel moisture
across southern AZ/NM, and cooling in the 500-700 mb layer will
support weak elevated instability from late morning through early
evening. This could result in isolated weak thunderstorms over parts
of southern AZ/NM within the cold core of the upper trough/low. Weak
instability and relatively warm surface to 700 mb temperatures will
preclude severe potential.

..Leitman.. 02/06/2026

$$

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

227
WWUS83 KLOT 060838
SPSLOT

Special Weather Statement
National Weather Service Chicago/Romeoville IL
238 AM CST Fri Feb 6 2026

ILZ003>006-011>013-020-023-103>108-INZ001-002-010-011-061145-
Winnebago-Boone-McHenry-Lake IL-De Kalb-Kane-DuPage-Kendall-
Kankakee-Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-
Including the cities of Rockford, Belvidere, Crystal Lake,
Algonquin, McHenry, Woodstock, Waukegan, Buffalo Grove,
Mundelein, Gurnee, DeKalb, Sycamore, Aurora, Elgin, Naperville,
Wheaton, Downers Grove, Lombard, Carol Stream, Oswego, Yorkville,
Plano, Kankakee, Bourbonnais, Bradley, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont,
Orland Park, Park Forest, Joliet, Bolingbrook, Plainfield,
Mokena, Channahon, Manhattan, Wilmington, Crete, Peotone,
Beecher, Gary, Hammond, Merrillville, Portage, Valparaiso,
Chesterton, Roselawn, Kentland, Morocco, Rensselaer, and DeMotte
238 AM CST Fri Feb 6 2026

...SNOW LIKELY TO RESULT IN TRAVEL IMPACTS EARLY THIS MORNING...

A period of snow is expected this morning. The snow will develop
prior to dawn and continue into the early to mid morning hours.
Brief bursts of heavier snowfall are likely; and untreated roads
will likely become snow covered and travel hazardous, particularly
across the Chicago Metropolitan area. Snow may mix with graupel
or snow pellets at times.

$$

- Izzi

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.

Winter Weather Warnings

No active Winter Weather 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.