SPC Convective Outlook Day 1

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918
ACUS01 KWNS 010537
SWODY1
SPC AC 010536

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1136 PM CST Sat Feb 28 2026

Valid 011200Z - 021200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms will be possible across parts of south Florida, the
southern and central Plains, and in northern California region this
afternoon and evening.

...Discussion...

South Florida: Large-scale pattern will not change appreciably
during the upcoming day1 period as broad upper troughing holds
across the eastern CONUS with ridging expected over the Great Basin.
Cool midlevel temperatures will overspread the FL Peninsula such
that modest boundary-layer heating will contribute to sufficient
instability for deep convection. Weak height rises and easterly
component to low-level flow are not particularly favorable for
severe thunderstorms, though a few robust updrafts could generate
gusty winds or small hail across the southeastern FL Peninsula.

Southern/Central Plains: Sharp cold front will settle south across
OK/TX Panhandle during the day as the center of the surface
anticyclone shifts into the Great Lakes. Modest boundary-layer
heating will be noted ahead of this wind shift across the TX South
Plains into southwestern OK which will result in convective
temperatures being breached by 22z as temperatures rise into the
lower 80s. PW values are not that moist across the southern Plains,
but weak low-level warm advection is expected atop the cold boundary
layer north of the front. Elevated convection should develop across
this region but weak buoyancy does not appear adequate for severe
hail with the strongest updrafts.

Northern California region: Modest midlevel height falls will spread
across northern CA ahead of a notable upper low that will approach
the coast by 02/00z. Left-exit region of 500mb jet is expected to
aid ascent across northern CA, and more than adequate instability
should materialize for thunderstorm development. Forecast soundings
exhibit around 500 J/kg MLCAPE with cool midlevel temperatures and
steep lapse rates. The most robust updrafts could generate small
hail, but this activity is expected to remain below severe levels.

..Darrow/Lyons.. 03/01/2026

$$

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

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766
FLUS43 KLOT 010832
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
232 AM CST Sun Mar 1 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-020845-
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-
232 AM CST Sun Mar 1 2026 /332 AM EST Sun Mar 1 2026/

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

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Tuesday night through Friday...
Limited Thunderstorm Risk at times.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

$$

LMZ740>745-020845-
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-
232 AM CST Sun Mar 1 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...

Hazardous conditions for small craft.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Tuesday night through Friday...
Limited Thunderstorm Risk at times.

$$

Petr

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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164
ACUS02 KWNS 010635
SWODY2
SPC AC 010634

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1234 AM CST Sun Mar 01 2026

Valid 021200Z - 031200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms will be possible on Monday and Monday night across
parts of the central U.S., in south Florida, and from the
Intermountain West into the central High Plains.

...DISCUSSION...
A mid-level shortwave ridge will move eastward across the Great
Plains on Monday. At the surface, a front will become
quasi-stationary across north-central Texas, as a ridge of high
pressure remains over Kansas and western Oklahoma. To the south of
the front, surface dewpoints will be mostly in the 50s F. Over the
top of the post-frontal airmass, south to south-southwest flow will
result in moisture advection. As low-level flow strengthens in the
evening, a pocket of instability is forecast to develop from
northwest Texas to central Kansas. After midnight on the northern
edge of a consolidating low-level jet, scattered thunderstorms will
be possible from north-central and northeast Kansas eastward into
northern Missouri.

Further to the west, additional storms will be possible in the
vicinity of a mid-level trough from the Intermountain West into the
central High Plains. Isolated storms may also develop in south
Florida during the day. No severe threat is expected across the
continental U.S. Monday and Monday night.

..Broyles.. 03/01/2026

$$

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

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728
ACUS03 KWNS 010821
SWODY3
SPC AC 010820

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0220 AM CST Sun Mar 01 2026

Valid 031200Z - 041200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated to scattered thunderstorms will be possible from Tuesday
into Tuesday night from parts of the southern and central Plains
eastward into the mid Mississippi Valley. Isolated storms may also
develop in south Florida.

...Southern and Central Plains/Mid Mississippi Valley...
At mid-levels, a shortwave ridge will move eastward into the Ozarks
on Tuesday, as flow becomes southwesterly over the south-central
U.S. Further west, an upper-level trough will move through the Four
Corners region. At the surface, a moist airmass with surface
dewpoints in the 50s and 60s F will advect northward across the
southern Plains and Arklatex. A cold front will move southeastward
into the central Plains. To the south of the front, an axis of
instability is forecast to develop in the afternoon from northwest
Texas into southeast Kansas and the northern Ozarks. The airmass is
expected to be capped across much of Texas and Oklahoma, although an
elevated storm or two will be possible Tuesday night. The greatest
chance for storms will be from eastern Kansas into the northern
Ozarks, where convective development will be aided by lift
associated with the exit region of a 40 to 50 knot low-level jet.
Considerable variance exists among the model solutions concerning
instability, suggesting that any severe threat will be highly
conditional. If moisture return ends up being greater than is
currently forecast, a marginal severe threat may need to be added in
later outlooks.

..Broyles.. 03/01/2026

$$

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

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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

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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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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

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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.