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Current Conditions

A message from COD Meteorology

Current Local Radar

Temperature
63°F
Feels Like:
63°F
Dew Point	Humidity
63°F	100%

Fair

Wind Strength
Light	Moderate	Strong
North at 0 mph

Local Graphical Forecast (Updated: 07/27/24 4:06 am)

Saturday (7/27)
Day	Night


High	Low
86	69

Sunday (7/28)
Day	Night

60%	30%
High	Low
80	69

Monday (7/29)
Day	Night

40%	50%
High	Low
86	71

Tuesday (7/30)
Day	Night

40%	30%
High	Low
88	71

Wednesday (7/31)
Day	Night


High	Low
91	72

Thursday (8/1)
Day	Night


High	Low
90	70

Friday (8/2)
Day	Night


High	Low
88

Detailed Text Forecast (Updated: 07/27/24 4:06 am)

Saturday: Sunny, with a high near 86. Light south southeast wind becoming south 5 to 10 mph in the morning.

Saturday Night: Mostly cloudy, with a low around 69. South southeast wind around 5 mph.

Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69. South wind 5 to 10 mph.

Monday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

Tuesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.

Tuesday Night: A chance of showers before 1am. Mostly clear, with a low around 71.

Wednesday: Mostly sunny, with a high near 91.

Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 72.

Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 90.

Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 70.

Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 88.

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SPC Convective Outlook Day 1

See Product Description

816
ACUS01 KWNS 270602
SWODY1
SPC AC 270600

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0100 AM CDT Sat Jul 27 2024

Valid 271200Z - 281200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR
CENTRAL/EASTERN ND INTO NORTHWEST MN...

...SUMMARY...
Scattered severe thunderstorms are possible across portions of the
northern Plains vicinity, mainly this afternoon and evening.

...Synopsis...
An occluded deep-layer cyclone will move eastward across parts of
northern SK/AB today, as a larger scale upper-level trough will
remain in place across much of the western CONUS into the northern
Plains. Multiple embedded shortwaves within this trough will move
across parts of the Great Basin and northern Rockies/Plains through
the period. A surface trough will extend southward from the occluded
low into the northern High Plains, with secondary low development
possible across western SD.

...Dakotas into northern MN...
Elevated convection will likely linger into this morning across
parts of northern MN, and also potentially across parts of the
Dakotas. A convectively enhanced shortwave trough related to the
Dakotas convection will move northeastward through the day. Some CAM
guidance depicts robust storm redevelopment across northern MN by
early/mid afternoon with a moist and increasingly unstable
environment, as this shortwave interacts with modifying outflow.
Should this development occur, deep-layer shear will be sufficient
for organized convection. While this scenario remains uncertain, a
couple of supercells and/or stronger clusters could develop, with a
threat of hail, damaging gusts, and perhaps a tornado. The Slight
Risk has been expanded eastward to cover this possible scenario, and
additional eastward expansion is possible if confidence increases.

Farther west, there will be some potential for storm development
near the surface trough/weak cold front across west-central ND and
potentially into western SD during the late afternoon and evening,
though guidance continues to vary regarding storm coverage within
this regime. Steep low/midlevel lapse rates, moderate to strong
buoyancy, and sufficient deep-layer shear will support a threat of
hail and strong to severe gusts, which could spread into parts of
the eastern Dakotas during the evening.

...Northern Great Basin into the central Rockies/High Plains
vicinity...
Scattered thunderstorms are expected this afternoon and evening from
the northern Great Basin into the central Rockies/High Plains, as
one embedded shortwave trough moves across WY into the
central/northern High Plains, and another shortwave moves from CA
into northern NV and southern ID. Multiple outflow-driven clusters
could evolve with time, posing a threat of at least isolated severe
gusts. Somewhat stronger instability across parts of northeast
CO/southeast WY into western NE could also support some hail
potential with the strongest storms.

..Dean/Halbert/Weinman.. 07/27/2024

$$

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 2

See Product Description

396
ACUS02 KWNS 270601
SWODY2
SPC AC 270559

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1259 AM CDT Sat Jul 27 2024

Valid 281200Z - 291200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS CENTRAL
SOUTH DAKOTA...

...SUMMARY...
Scattered severe thunderstorms are expected across portions of the
central/northern Plains on Sunday.

...Synopsis...
An upper-level low across Arkansas/eastern Oklahoma will start to
fill and accelerate northeast as an open wave on Sunday. A low
amplitude mid-level trough will remain centered across the western
CONUS with several embedded mid-level impulses within moderate
southwesterly flow from the Great Basin to the northern Plains.
Farther east, a mid-level trough will become a cutoff low over the
Gulf Stream and start to retrograde toward the New England coast
late in the forecast period.

Persistent southwesterly mid-level flow will result in lee troughing
across the Plains and strengthening southerly surface flow. This
will bring renewed Gulf moisture northward into the Upper Midwest
and northern Plains.

...Central/Northern Plains...
A surface low will likely be located somewhere across western South
Dakota on Sunday and will only drift slightly east through the day.
East of this surface low, southerly winds will increase low-level
moisture with dewpoints increasing to the upper 60s/near 70 by 00Z.
By late afternoon, a warm front is forecast to become better defined
across north-central South Dakota which, in addition to the cold
front/dryline, should be a source for thunderstorm development as a
mid-level shortwave trough approaches the region during the
afternoon/evening. Moderate flow associated with this mid-level
shortwave trough should result in 35 to 40 knots of effective shear
by late afternoon which would be sufficient for supercells. Moderate
instability and moderate shear will support a large hail threat,
while inverted-v thermodynamic profiles will also support a severe
wind threat. The low-level jet axis is mostly southeast of the
greatest upper-level support and thus, upscale growth into an MCS
remains uncertain. However, storm coverage may be great enough for
upscale growth into one or more MCSs which could maintain some
severe weather threat into the overnight hours across southern
Minnesota and western Iowa where the low-level jet is forecast to
strengthen to 35 to 45 knots Sunday night.

A Slight Risk has been introduced across South Dakota, in proximity
to the mid-level shortwave trough, where greater storm coverage
appears likely. Elsewhere, northeast to the Canadian border and
farther south across Nebraska and northern Kansas, storm coverage
remains more questionable, which precludes higher probabilities at
this time.

..Bentley.. 07/27/2024

$$

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

322
ACUS03 KWNS 270720
SWODY3
SPC AC 270719

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0219 AM CDT Sat Jul 27 2024

Valid 291200Z - 301200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ALONG THE
MISSISSIPPI RIVER FROM SOUTHEAST MINNESOTA AND WESTERN WISCONSIN TO
THE MISSOURI BOOTHEEL...

...SUMMARY...
Scattered strong to severe storms are possible in portions of the
Midwest on Monday.

...Synopsis...
On Monday, a broad, low-amplitude ridge will be centered across the
High Plains with a trough axis near the Pacific Coast and a trough
across the Ohio Valley and the East Coast. As the East Coast
upper-level low continues to retrograde during the day, these
features will phase into one larger trough across the eastern CONUS.
Several embedded mid-level shortwave troughs will traverse the
northern CONUS and Canadian Prairies into the northwest flow across
the Midwest.

...Midwest...
Rich Gulf moisture will become well established across the Midwest
by Monday with dewpoints in the mid 70s. This will result in a very
unstable environment with MLCAPE 3000+ J/kg across portions of the
Upper Mississippi River Basin. This strongly unstable environment
will develop beneath 25 to 40 knots of mid-level flow which will
provide ample shear for storm organization. However, despite a
favorable severe weather parameter space that is expected within a
broad zone across the Midwest, the details remain highly uncertain.
Thunderstorms will be likely Monday morning given the strong
low-level jet across Missouri and Iowa Sunday night. It is unclear
whether this convection may simply stabilize portions of the risk
area and lessen the severe weather threat, or if upscale growth can
occur and persist into the late morning and if a severe MCS can
develop from this activity and move southward along the Mississippi
River vicinity. However, if this does not occur and substantial
destabilization is able to occur farther north, the greatest severe
weather threat may be focused near southeast Minnesota, southwest
Wisconsin, eastern Iowa and northwest Illinois. The GFS favors this
scenario with suppression of southern convection and a mid-level
shortwave trough moving through southern Minnesota Monday afternoon.
However, the ECMWF has a stronger southern-stream trough Monday
morning which aids in greater storm maintenance across Missouri and
southern Illinois. These inconsistencies are likely tied to
Day2/Sunday convection across the Plains and therefore, it may not
be clear where the greatest threat is until closer to the Day 1
period. A broad marginal risk across the region with the most
favorable environment seems like the most appropriate outlook until
mesoscale details become more clear.

..Bentley.. 07/27/2024

$$

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.