Essentials:

Regional Satellite and Radar...

-with Watches and Warnings
-with Lightning Detection

Helpful Information:

Weather Safety:

Protocols:

COD Severe Weather Protocols

Storm Ready®: Status Message

...loading current StormReady® status...

Current Conditions

College of DuPage SkyCam

Current Local Radar

Temperature
38°F
Feels Like:
38°F
Dew Point	Humidity
31°F	76%

Partly Cloudy

Partly Cloudy

Wind Strength
Light	Moderate	Strong
Southwest at 3 mph GUST: 4mph

Detailed Text Forecast

Due to staffing issues, forecast information from the COD Meteorology Department will be unavailable until Fall 2021.

For detailed forecast information: See National Weather Service Forecast .

COD Weather Statistics

COD Weather Station Statistics

Time of Observation: 4/18/21 - 3:09:51 am
Latitude: 41.89°N
Longitude: -88.15°W
Elevation: 747.63 ft
Sunrise: 6:07am
Sunset: 7:35pm

Current Weather Conditions

Currently: Partly Cloudy
Visibility: 10SM
Present Weather:
Cloud Cover: Partly Cloudy

Temperature and Pressure

Air Temperature: 38.31°F
Dewpoint Temperature: 31.27°F
Wet-Bulb Temperature: 35.96°F
Humidity: 75.57%
Wind Chill:
Heat Index:
Pressure: 1013.89mb

Precipitation and Wind

Current Precipitation: N/A
Measured Liquid Precipitation: 0.00 Inches
Current Wind: From the SW at 2.69mph
Recent Peak Wind Gust: 3.94mph at 3:09am

Recent Station Records

Highest Temperature (Today): 39.82°F
Lowest Temperature (Today): 37.75°F

Highest Relative Humidity (Today): 77.82%
Lowest Relative Humidity (Today): 58.96%

Highest Pressure (Today): 1014.56mb
Lowest Pressure (Today): 1013.55mb

Measured Liquid Precip (Today): 0.00 Inches
Measured Liquid Precip (Month): 0.61 Inches
Measured Liquid Precip (Year): 1.90 Inches

Peak Wind Gust (Today): 4.16mph at 2:32am

SPC Convective Outlook Day 1

See Product Description

775
ACUS01 KWNS 180516
SWODY1
SPC AC 180514

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1214 AM CDT Sun Apr 18 2021

Valid 181200Z - 191200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR CENTRAL
FLORIDA...

...SUMMARY...
Isolated strong to severe storms may occur today across parts of the
northern/central Florida Peninsula, with gusty winds and hail the
main threats.

...Synopsis...
Mostly zonal flow with periodic low-amplitude shortwave troughs will
persist from the Gulf Coast states to Florida through the period. At
the surface, a stalled front will be present from the central Gulf
of Mexico to the central Florida Peninsula. This front will be a
focus for storm activity through the day Sunday with the potential
for a few strong to severe storms.

...Florida...
A mid-level shortwave trough located off the Florida Peninsula early
Sunday morning will shift eastward by morning and may provide enough
ascent for scattered storm activity across north-central Florida.
However, regional radar shows the surface front moving south from
Citrus to Flagler counties with areas north of this boundary more
stable. This may reduce the intensity of any convection which forms
across north-central Florida early in the day.

The aforementioned front is expected to stall somewhere near Orlando
with little movement expected through the day. Temperatures are
forecast to increase into the 80s with dewpoints ranging from the
upper 60s to low 70s by the afternoon. Nebulous forcing may keep
storm coverage isolated from late morning through mid-afternoon.
However, by the late afternoon/evening, weak mid-level height falls
are expected to overspread the region and this subtle ascent
combined with an unstable boundary layer should be sufficient for
scattered storm development. Effective shear in excess of 40 knots
should aid in storm organization and may support some supercell
structures. Mid-level lapse rates around 7 C/km are not overly
steep, but should be sufficient for a threat for isolated large
hail, especially if any sustained rotating updrafts can develop.
Overall, scattered strong storms with isolated severe storms are
expected with a threat for both large hail and damaging winds.

An isolated strong to severe storm threat may persist overnight as
the low-level jet strengthens and low-level moisture advection
sustains surface based instability ahead of the surface front as it
slowly moves south along the Peninsula.

Elsewhere, some gusty winds may accompany storm activity in the
northern Rockies as storms form in an environment with a dry
sub-cloud layer and moderately strong northwesterly flow 0.5 to 1 km
AGL. Limited instability precludes the addition of a marginal risk
at this time.

..Bentley/Jewell.. 04/18/2021

$$

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

383
FLUS43 KLOT 172049
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
349 PM CDT Sat Apr 17 2021

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-182100-
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-
349 PM CDT Sat Apr 17 2021 /449 PM EDT Sat Apr 17 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Elevated Frost Risk for Northwest Indiana.

DISCUSSION...

Temperatures as low as 32 degrees combined with light winds will
result in areas of frost overnight for portions of northwest
Indiana.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Monday night and Tuesday...
Limited Snow Risk.
Tuesday night and Wednesday night...
Significant Freeze Risk.

DISCUSSION:

A late season storm system may bring accumulating wet snow to the
area late Monday night into Tuesday evening, with accumulations
primarily on non-paved surfaces. Sub-freezing temperatures Tuesday
night and again Wednesday night will result in a significant
freeze risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

$$

LMZ740>745-182100-
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-
349 PM CDT Sat Apr 17 2021

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...Sunday through Friday.

Tuesday and Wednesday...
Hazardous conditions for small craft are likely.

$$

Petr

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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

782
ACUS02 KWNS 180527
SWODY2
SPC AC 180525

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1225 AM CDT Sun Apr 18 2021

Valid 191200Z - 201200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE CENTRAL/SOUTHERN FLORIDA PENINSULA...

...SUMMARY...
Isolated strong to severe thunderstorms will be possible on Monday
across parts of the central and southern Florida Peninsula. Hail and
strong/gusty winds should be the main threats.

...Central/Southern Florida Peninsula...
A surface front is forecast to overlie the central FL Peninsula on
Monday. This boundary should advance slowly southward through the
day. Convection will probably be ongoing Monday morning along and
north of the front. Even though large-scale forcing is expected to
remain nebulous, sufficient low-level convergence along the front
should provide a focus for additional surface-based storm
development by Monday afternoon. This appears most probable across
parts of the central/southern FL Peninsula, where upper 60s to low
70s surface dewpoints should be in place. The rich low-level
moisture coupled with diurnal heating and cool mid-level
temperatures (around -10C at 500 mb) should support MLCAPE reaching
about 1500-2000 J/kg Monday afternoon.

The stronger flow associated with a belt of enhanced mid-level
west-southwesterly winds should remain mostly to the north of the
surface front. Still, about 30-40 kt of mid-level winds should
overlap the front and warm sector, which will provide enough
deep-layer shear to support some updraft organization. Isolated
large hail and strong/gusty winds should be the main threats with
any storms that can form along/south of the boundary across the
central/southern FL Peninsula through the day. Weak convergence
along the front with generally parallel flow aloft will probably
limit overall storm coverage, and the severe threat should remain
fairly isolated.

...Eastern North Carolina and Far Southeastern Virginia...
Isolated to scattered storms may form by late Monday morning across
this region as a shortwave trough moves eastward across the
Mid-Atlantic. Low-level moisture ahead of this feature will likely
remain fairly limited, with surface dewpoints generally in the 50s.
If enough boundary-layer instability can develop ahead of the
storms, then strong/gusty downdraft winds might occur. However,
there is currently too much uncertainty regarding the degree of
low-level moisture and sufficient destabilization to include low
severe probabilities.

..Gleason.. 04/18/2021

$$

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

288
ACUS03 KWNS 180723
SWODY3
SPC AC 180722

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0222 AM CDT Sun Apr 18 2021

Valid 201200Z - 211200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE CENTRAL/SOUTHERN FLORIDA PENINSULA...

...SUMMARY...
Isolated strong to severe storms appear possible on Tuesday across
portions of the central and southern Florida Peninsula.

...Florida Peninsula...
Within large-scale upper troughing across much of the
central/eastern CONUS, a low-amplitude shortwave trough should move
across parts of the Southeast on Tuesday. A persistent surface
boundary across the central FL Peninsula may attempt to lift
northward as a warm front as a weak low develops from the
northeastern Gulf of Mexico to the western Atlantic through the
period. Convection may be ongoing Tuesday morning to the north of
the surface boundary in a modest low-level warm advection regime. It
remains somewhat uncertain how far north the front will advance
across the northern/central FL Peninsula through the day, and this
boundary will likely serve as the northern limit to an isolated
severe threat. With a moist low-level airmass remaining in place
across the central/southern FL Peninsula, it will not take much
diurnal heating to foster weak to locally moderate instability by
Tuesday afternoon. Both low and mid-level wind fields are forecast
to strengthen through the day, supporting strong deep-layer shear.
Organized severe thunderstorms posing mainly an isolated large hail
and damaging wind threat may occur along/south of the front as the
glancing influence of large-scale ascent with the shortwave trough
overspreads this region.

..Gleason.. 04/18/2021

$$

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.