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Current Conditions

A message from COD Meteorology

Current Local Radar

Temperature
64°F
Feels Like:
64°F
Dew Point	Humidity
56°F	75%

Fair

Wind Strength
Light	Moderate	Strong
Southwest at 9 mph

Local Graphical Forecast (Updated: 06/02/20 3:16 am)

Tuesday (6/2)
Day	Night

	50%
High	Low
92	71

Wednesday (6/3)
Day	Night

40%
High	Low
86	63

Thursday (6/4)
Day	Night

	30%
High	Low
85	66

Friday (6/5)
Day	Night


High	Low
86	62

Saturday (6/6)
Day	Night


High	Low
78	59

Sunday (6/7)
Day	Night


High	Low
80	63

Monday (6/8)
Day	Night


High	Low
86

Detailed Text Forecast (Updated: 06/02/20 3:16 am)

Tuesday Night: Partly cloudy, with a low around 66. Southwest wind around 15 mph, with gusts as high as 20 mph.

Tuesday: Mostly sunny, with a high near 92. Heat index values as high as 95. West southwest wind around 15 mph, with gusts as high as 25 mph.

Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. West southwest wind 5 to 15 mph, with gusts as high as 25 mph.

Wednesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night: Partly cloudy, with a low around 63. East northeast wind around 5 mph becoming calm in the evening.

Thursday: Mostly sunny, with a high near 85.

Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66.

Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 86.

Friday Night: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62.

Saturday: Sunny, with a high near 78.

Saturday Night: Partly cloudy, with a low around 59.

Sunday: Mostly sunny, with a high near 80.

Sunday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63.

Monday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.

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Copyright © 2020

Contact COD Meteorology "NEXLAB":
Phone: 630-942-2590
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SPC Convective Outlook Day 1

See Product Description

365
ACUS01 KWNS 020543
SWODY1
SPC AC 020542

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1242 AM CDT Tue Jun 02 2020

Valid 021200Z - 031200Z

...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN
MINNESOTA TO SOUTHERN WISCONSIN...

...SUMMARY...
Severe thunderstorms are expected later today from the middle
Missouri and upper Mississippi Valleys into the Great Lakes.
Damaging wind gusts, large hail and a couple of tornadoes are
possible, with the greatest threat expected from southern
Minnesota/northern Iowa into central Wisconsin.

...Middle MO Valley to Upper Great Lakes...

Early-morning water-vapor imagery depicts a strong short-wave trough
along the AB/SK border, extending into western MT. Southern extent
of this feature is forecast to move across the Dakotas later today
which will flatten the northern Plains ridge, then advance into the
upper Great Lakes tonight. In response, synoptic front is forecast
to move across northwestern WI - into southern MN - southeastern SD
by 18z, then drape itself from central WI - MN/IA border - central
NE by early evening. Latest model guidance strongly suggests
surface-based parcels will remain capped through 22z but convection
could begin to develop along the cool side of the front a few hours
earlier where short-wave forcing is more notable. Latest CAMs
suggest isolated elevated thunderstorms could initiate over eastern
SD by early afternoon, then spread/develop east along/near the
frontal zone into southern MN. A corridor of strong instability is
expected across this region into central WI and there is increasing
confidence that early-afternoon convection will eventually take
advantage of this downstream buoyancy and ingest moist/unstable
boundary-layer inflow. If so, robust convective updrafts are likely
with adequate shear for organized multi-cell clusters and perhaps a
few supercells. Forecast soundings suggest very large hail could
occur, but most likely with supercell structures. Otherwise, if an
MCS evolves ahead of the front, there is some concern for damaging
winds given the instability. This activity should propagate across
southern WI into lower MI after sunset, possibly spreading into
northern OH during the pre-dawn hours.

...Eastern WY...

Surface front is forecast to settle south across the High Plains of
eastern WY with northeasterly upslope flow expected to develop by
late afternoon. Boundary-layer heating and orographic forcing
suggest isolated supercells may develop along the southern fringe of
modest westerly mid-level flow. This activity should spread
southeast toward the NE Panhandle during the evening.

..Darrow/Lyons.. 06/02/2020

$$

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

071
FLUS43 KLOT 020846
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
346 AM CDT Tue Jun 2 2020

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-030900-
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-
346 AM CDT Tue Jun 2 2020 /446 AM EDT Tue Jun 2 2020/

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 Excessive Heat Risk.
Elevated Thunderstorm Risk overnight...with an associated:
Elevated Hail Risk...up to half dollar size.
Elevated Damaging Wind Risk...up to 60 mph.
Limited Tornado Risk.
Limited Flooding Risk overnight.

DISCUSSION...

Early season heat will prevail today with afternoon heat indices
reaching the mid 90s.

Thunderstorms are likely overnight, especially along and north of
Interstates 88 and 290. Some of these may be strong to severe, with
gusty winds, large hail, and a localized flooding risk.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Elevated Severe Thunderstorm Risk.
Limited Flooding Risk.
Thursday and Friday...
Limited Thunderstorm Risk.
Monday...
Limited Thunderstorm Risk.

DISCUSSION:

Scattered thunderstorms on Wednesday morning are possible and on
Wednesday afternoon are likely along and south of I-80. Some of these
storms could be severe with an additional heavy rain threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated due to the later night risk.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east southeast at 35 to 40 mph.

$$

LMZ740>745-030900-
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-
346 AM CDT Tue Jun 2 2020

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.
Elevated Thunderstorm Risk overnight...with an associated:
Elevated hail risk...up to quarter size.
Elevated thunderstorm wind gust risk...up to 50 knots.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Limited Severe Thunderstorm Risk.
Thursday and Friday...
Limited Thunderstorm Risk.
Monday...
Limited Thunderstorm Risk.

$$

MTF

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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

492
ACUS02 KWNS 020602
SWODY2
SPC AC 020600

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
0100 AM CDT Tue Jun 02 2020

Valid 031200Z - 041200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE
NORTH-CENTRAL PLAINS TO THE MIDWEST/OHIO VALLEY AND NORTHEAST
STATES/DELMARVA...

...SUMMARY...
Severe thunderstorms are expected on Wednesday from the
North-central Plains to the Midwest, Ohio Valley, and parts of the
Northeast States/Delmarva.

...Overview...
An extensive west/east zone of severe-weather potential is expected
on Wednesday, influenced by a south/southeastward-moving front
across the Midwest/Ohio Valley to Northeast States/Delmarva, and a
supercell-favorable environment across the north-central High
Plains.

...North-central High Plains/Central Plains...
A belt of strengthening westerlies over the northern Plains will
influence the region into Wednesday afternoon/night. Severe
thunderstorms will initially be possible across the north-central
High Plains Wednesday afternoon in vicinity of a prefrontal trough
and/or southeastward-moving front. This includes western South
Dakota and possibly southwest North Dakota/northwest Nebraska. Other
storm development may focus in vicinity of northeast
Colorado/southwest Nebraska into northwest Kansas. At least isolated
supercells are expected across these regions with large hail and
strong wind gusts probable. Into Wednesday evening/night, there is
the possibility than an MCS or at least several storm clusters could
persist and move southeastward Wednesday night, generally near the
Kansas/Nebraska border. If so, a severe threat could continue into
the overnight.

...Upper Ohio Valley/Northeast States...
A low-amplitude shortwave trough and a related belt of strong
cyclonically curved west-northwesterly winds aloft (40-55 kt at 500
mb) will overlie a south/southeastward-spreading front. The
potential exists for early day convection across the region, and
this convection and related cloud cover casts some uncertainty 1)
regarding the exact degree of destabilization and 2) a preferred
corridor of any higher coverage severe potential.

That said, moderate buoyancy (upwards of 2000 J/kg MLCAPE) is
plausible near/south of the front and to the south of any residual
early day precipitation/outflow. Storms will likely
increase/intensify through early/mid afternoon near the effective
front. The strong mid/high-level westerlies and 40+ kt effective
shear would support some initial supercells along with
well-organized southeastward-moving clusters. Damaging winds and
severe hail are expected. Although low-level winds will tend to
remain veered in areas near/south of the front, moderately strong
low-level shear/SRH could yield a non-zero tornado risk during the
afternoon and early evening hours.

...Midwest including Missouri to Ohio...
The boundary layer should become moderately to strongly unstable
Wednesday afternoon along and south of a southward-advancing front,
with the strongest destabilization (3000+ J/kg MLCAPE) expected
across northern/central Missouri into much of Illinois/Indiana.
Sufficient near-frontal convergence and forcing for ascent should
allow for at least widely scattered deep convective development
through the afternoon. While deep-layer/low-level winds will be not
be overly strong, the degree of instability and roughly 20-30 kt
effective shear will support sustained multicellular clusters
capable of wind damage and severe hail.

..Guyer.. 06/02/2020

$$

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

142
ACUS03 KWNS 020730
SWODY3
SPC AC 020729

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0229 AM CDT Tue Jun 02 2020

Valid 041200Z - 051200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE CENTRAL
PLAINS AND MIDDLE/LOWER MISSOURI VALLEY...

...SUMMARY...
Severe thunderstorms are expected across parts of the Central Plains
and Lower/Middle Missouri River Valley on Thursday, with other
strong/severe thunderstorms possible from the Ozarks to the
Mid-Atlantic region and Carolinas.

...Central Plains and Middle/Lower Missouri Valley...
Although guidance variability exists regarding timing/location of
relevant shortwave features into the Day 3 time frame, the region
will be influenced by a moderately strong belt of low-amplitude
westerlies. A relatively moist/potentially unstable air mass is
expected near a front along the South Dakota/Nebraska border
vicinity and along/east of a southward-extending surface trough
across west-central portions of Nebraska and Kansas.

Surface-based convective development appears most likely to occur by
mid/late afternoon across east-central/northeast Nebraska into
southwest South Dakota/southwest Minnesota. Steep lapse rates,
moderate to strong buoyancy (2000-3500 J/kg MLCAPE) in the presence
of 40 kt effective shear will be favorable for supercells capable of
large hail and possibly some tornado risk. It seems probable that
one or more southeastward-moving forward-propagating clusters of
storms could evolve during the evening, with a damaging wind threat
increasing accordingly, potentially across areas such as eastern
Nebraska into western Iowa/northeast Kansas/northern Missouri.

...Southern Appalachians/Mid-Atlantic States/Carolinas...
Near/south of a front across these regions, moderate instability may
develop particularly across parts of Virginia/northern North
Carolina Thursday afternoon. Deep-layer shear will not be strong,
but 20-25 kt mid-level westerlies should overlie much of the frontal
corridor. Isolated severe thunderstorms will be possible, with wind
damage as the primary hazard. A categorical Slight Risk could
ultimately be warranted for parts of the region.

..Guyer.. 06/02/2020

$$

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.