Red Flag Warning
* Affected Area...Winnebago, Boone, McHenry, Lake IL, Ogle, Lee,
De Kalb, Kane, DuPage, Cook, La Salle, Kendall, Grundy, Will,
Kankakee and Livingston.
* Timing...Until 8 PM CST this evening.
* Winds...Southwest 20 to 30 mph with gusts up to 45 mph.
* Relative Humidity...As low as 17 percent.
* Impacts...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
From: Feb 18, 2026 20:24
Until: Feb 19, 2026 02:00
Wind Advisory
* WHAT...West winds 20 to 30 mph with gusts up to 45 mph expected.
* WHERE...Boone, De Kalb, Lee, Central Cook, DuPage, Kane, Lake IL,
McHenry, and Northern Cook Counties.
* WHEN...Until 6 PM CST this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
From: Feb 18, 2026 14:55
Until: Feb 19, 2026 00:00
Red Flag Warning
...RED FLAG WARNING EXPANDED TO INCLUDE CHICAGO METRO...
Conditions will turn very dry and windy this afternoon, making
conditions supportive of brush fire spread. Even with rainfall
last night generally 0.05 to 0.15 of an inch across northeastern
Illinois, the combination of warm, dry, and windy conditions will
cause fine fuels to dry out by early afternoon. As a result, the
Red Flag Warning was expanded to include Cook, DuPage, Will,
Kankakee, and Lake (IL) Counties until 8 PM this evening.
* Affected Area...Winnebago, Boone, McHenry, Ogle, Lee, De Kalb,
Kane, La Salle, Kendall, Grundy and Livingston.
* Timing...Until 8 PM CST this evening.
* Winds...Southwest 20 to 30 mph with gusts up to 50 mph.
* Relative Humidity...As low as 15 to 20 percent.
* Impacts...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
From: Feb 18, 2026 15:03
Until: Feb 18, 2026 23:15
Red Flag Warning
...RED FLAG WARNING EXPANDED TO INCLUDE CHICAGO METRO...
Conditions will turn very dry and windy this afternoon, making
conditions supportive of brush fire spread. Even with rainfall
last night generally 0.05 to 0.15 of an inch across northeastern
Illinois, the combination of warm, dry, and windy conditions will
cause fine fuels to dry out by early afternoon. As a result, the
Red Flag Warning was expanded to include Cook, DuPage, Will,
Kankakee, and Lake (IL) Counties until 8 PM this evening.
The National Weather Service in Chicago has issued a Red Flag
Warning, which is in effect until 8 PM CST this evening.
* Affected Area...Lake IL, DuPage, Cook, Will and Kankakee.
* Timing...Until 8 PM CST this evening.
* Winds...Southwest 20 to 30 mph with gusts up to 45 mph.
* Relative Humidity...As low as 15 to 20 percent.
* Impacts...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
From: Feb 18, 2026 15:03
Until: Feb 18, 2026 23:15
Winter Weather Advisory
* WHAT...Snow expected. Total snow accumulations 2 to 3 inches,
within a few hour period.
* WHERE...DuPage, Lake IL, and Northern Cook Counties.
* WHEN...From 9 AM to 3 PM CST Friday.
* IMPACTS...Roads will likely become slick and hazardous.
* ADDITIONAL DETAILS...A burst of accumulating snow is expected mid
to late Friday morning through early afternoon. The snow during
this period may briefly fall at a rate of up to an inch per hour
and make for slick travel conditions.
From: Jan 30, 2026 15:00
Until: Jan 30, 2026 21:00
Winter Weather Advisory
* WHAT...Snow, heavy at times this afternoon and early evening. An
additional 2 to 4 inches of snow will fall near the lake ranging
to around an inch near the Kankakee River.
* WHERE...Lake IN County.
* WHEN...Until midnight CST tonight.
* IMPACTS...Roads will be snow covered and travel hazardous.
From: Jan 25, 2026 18:24
Until: Jan 26, 2026 04:30
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 20 below expected.
* WHERE...Central Cook County.
* WHEN...From midnight tonight to noon CST Monday.
* IMPACTS...The dangerously cold wind chills as low as 20 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
From: Jan 25, 2026 16:05
Until: Jan 26, 2026 02:15
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 20 TO 25 below expected.
* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.
* WHEN...From midnight CST tonight to noon CST Monday.
* IMPACTS...The dangerously cold wind chills as low as 25 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
From: Jan 25, 2026 16:05
Until: Jan 26, 2026 02:15
Winter Weather Advisory
* WHAT...Snow will end this afternoon with additional accumulation
generally an inch or less.
* WHERE...Lake IL County.
* WHEN...Until 6 PM CST this evening.
* IMPACTS...Roads will be snow covered and travel hazardous.
From: Jan 25, 2026 18:24
Until: Jan 26, 2026 00:00
Winter Weather Advisory
* WHAT...Snow. Additional snow accumulations up to one
inch.Visibility may occasionally drop below 1 mile, particularly
during the day on Sunday.
* WHERE...Portions of central, east central, north central, and
northeast Illinois.
* WHEN...Until 6 PM CST this evening.
* IMPACTS...Roads will be snow covered and travel hazardous.
From: Jan 25, 2026 18:24
Until: Jan 26, 2026 00:00
Winter Storm Warning
* WHAT...Snow, heavy at times, will end from north to south this
afternoon. Additional snowfall of an inch or two northern Cook
County ranging to 2 to 4 additional inches over southeast Cook
County. Storm total snowfall will range from 2 to 4 inches
northwest Cook County to 6 to 12 inches near the lake.
* WHERE...Central Cook, Northern Cook, and Southern Cook Counties.
* WHEN...Until 4 PM CST this afternoon.
* IMPACTS...Travel will remain hazardous into this afternoon.
From: Jan 25, 2026 18:24
Until: Jan 25, 2026 22:00
Winter Weather Advisory
* WHAT...Snow. Total snow accumulations between 3 and 7 inches.
Locally higher totals possible in portions of Porter County.
* WHERE...Lake IN and Porter Counties.
* WHEN...Until midnight CST tonight.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
From: Jan 25, 2026 09:55
Until: Jan 25, 2026 20:00
Winter Weather Advisory
* WHAT...Lake effect snow. Total snow accumulations between 1 and 6
inches, lowest totals over western portions of Lake County and
northwest Cook County. Isolated totals over 6 inches possible
within a few miles of the lakeshore.
* WHERE...Central Cook, Lake IL, and Northern Cook Counties.
* WHEN...Until 6 PM CST this evening.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
From: Jan 25, 2026 09:55
Until: Jan 25, 2026 20:00
Winter Weather Advisory
* WHAT...Snow. Total snow accumulations between 2 and 5 inches,
highest east of Interstate 55 and south of Interstate 80.
* WHERE...Portions of central, east central, north central, and
northeast Illinois.
* WHEN...Until 6 PM CST this evening.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
From: Jan 25, 2026 09:55
Until: Jan 25, 2026 20:00
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 20 to 25 below expected.
* WHERE...Portions of central, east central, north central, and
northeast Illinois.
* WHEN...From midnight tonight to noon CST Monday.
* IMPACTS...The dangerously cold wind chills as low as 25 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
From: Jan 25, 2026 08:35
Until: Jan 25, 2026 18:45
Cold Weather Advisory
* WHAT...Very cold wind chills around 20 below expected.
* WHERE...Central Cook County.
* WHEN...From midnight tonight to noon CST Monday.
* IMPACTS...The dangerously cold wind chills as low as 20 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
From: Jan 25, 2026 08:35
Until: Jan 25, 2026 18:45
Cold Weather Advisory
* WHAT...Very cold wind chills around 20 below expected.
* WHERE...Benton, Jasper, Lake IN, and Newton Counties.
* WHEN...From midnight CST /1 AM EST/ tonight to noon CST /1 PM EST/
Monday.
* IMPACTS...The dangerously cold wind chills as low as 20 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
From: Jan 25, 2026 08:35
Until: Jan 25, 2026 18:45
Hydrologic Outlook
ESFLOT
Cold temperatures this week have caused a significant increase in
river ice across the area, including multiple ice jams. Cold
temperatures are expected to continue into next week, with favorable
conditions for river ice formation. Areas of open river may see new
ice growth, while areas with existing ice cover my thicken.
No widespread flooding is expected, but ice jams will be possible in
isolated areas, especially along the Rock, Fox, and Kankakee rivers.
Ice jams may cause rises or fluctuations on area rivers with little
warning.
Persons with interests along area rivers should closely monitor the
latest forecasts.
From: Jan 23, 2026 20:20
Until: Jan 24, 2026 18:00
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 20 to 25 below.
* WHERE...In Illinois, Ford and Iroquois Counties. In Indiana,
Benton, Jasper, Lake IN, Newton, and Porter Counties.
* WHEN...Until 9 AM CST /10 AM EST/ Saturday.
* IMPACTS...The dangerously cold wind chills as low as 20 to 25
below zero could cause frostbite on exposed skin in as little as
30 minutes.
From: Jan 23, 2026 20:52
Until: Jan 24, 2026 13:15
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 25 to 30 below.
* WHERE...Portions of central, north central, and northeast Illinois.
* WHEN...Until 9 AM CST Saturday.
* IMPACTS...The dangerously cold wind chills as low as 25 to 30
below zero could cause frostbite on exposed skin in as little as
30 minutes.
From: Jan 23, 2026 20:52
Until: Jan 24, 2026 13:15
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 15 to 30 below expected.
* WHERE...Central Cook County.
* WHEN...Until 9 AM CST Saturday.
* IMPACTS...The dangerously cold wind chills as low as 30 below zero
could cause frostbite on exposed skin in as little as 10 to 30
minutes.
From: Jan 23, 2026 18:04
Until: Jan 24, 2026 13:15
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 25 below.
* WHERE...Central Cook County.
* WHEN...Until 9 AM CST Saturday.
* IMPACTS...The dangerously cold wind chills as low as 25 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
From: Jan 23, 2026 20:52
Until: Jan 24, 2026 07:00
Cold Weather Advisory
* WHAT...Bitterly cold wind chills of 15 to 30 below zero expected.
* WHERE...In Illinois, Ford and Iroquois Counties. In Indiana,
Benton, Jasper, Lake IN, Newton, and Porter Counties.
* WHEN...Until 9 AM CST /10 AM EST/ Saturday.
* IMPACTS...The dangerously cold wind chills could cause frostbite
on exposed skin in as few as 10 to 30 minutes.
From: Jan 23, 2026 18:04
Until: Jan 24, 2026 04:15
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 15 to 30 below expected.
* WHERE...Portions of central, north central, and northeast Illinois.
* WHEN...Until 9 AM CST Saturday.
* IMPACTS...The dangerously cold wind chills as low as 30 below zero
could cause frostbite on exposed skin in as little as 10 to 30
minutes.
From: Jan 23, 2026 18:04
Until: Jan 24, 2026 04:15
Cold Weather Advisory
* WHAT...Very cold wind chills as low as 15 to 30 below expected.
* WHERE...In Illinois, Ford and Iroquois Counties. In Indiana,
Benton, Jasper, Lake IN, Newton, and Porter Counties.
* WHEN...From 3 AM CST Friday to 9 AM CST Saturday.
* IMPACTS...Dangerously cold wind chills could cause frostbite on
exposed skin in as little as 10 to 30 minutes.
From: Jan 22, 2026 17:24
Until: Jan 23, 2026 03:30
Extreme Cold Warning
* WHAT...For the Extreme Cold Warning, dangerously cold wind chills
as low as 30 to 40 below zero expected. For the Cold Weather
Advisory, very cold wind chills as low as 15 to 30 below expected.
* WHERE...Portions of central, north central, and northeast Illinois.
* WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday.
For the Cold Weather Advisory, from noon Friday to 9 AM CST
Saturday.
* IMPACTS...Dangerously cold wind chills could cause frostbite on
exposed skin in as little as 10 minutes.
* ADDITIONAL DETAILS...Coldest wind chills are expected across
interior portions of northern Illinois.
From: Jan 22, 2026 17:24
Until: Jan 23, 2026 03:30
Cold Weather Advisory
* WHAT...For the Extreme Cold Warning, dangerously cold wind chills
as low as 30 to 35 below zero expected. For the Cold Weather
Advisory, very cold wind chills as low as 15 to 30 below expected.
* WHERE...Central Cook County.
* WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday.
For the Cold Weather Advisory, from noon Friday to 9 AM CST
Saturday.
* IMPACTS...Dangerously cold wind chills could cause frostbite on
exposed skin in as little as 10 minutes.
From: Jan 22, 2026 17:24
Until: Jan 23, 2026 03:30
Extreme Cold Warning
* WHAT...For the Extreme Cold Warning, dangerously cold wind chills
as low as 30 to 35 below zero expected. For the Cold Weather
Advisory, very cold wind chills as low as 15 to 30 below expected.
* WHERE...Central Cook County.
* WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday.
For the Cold Weather Advisory, from noon Friday to 9 AM CST
Saturday.
* IMPACTS...Dangerously cold wind chills could cause frostbite on
exposed skin in as little as 10 minutes.
From: Jan 22, 2026 17:24
Until: Jan 23, 2026 03:30
Cold Weather Advisory
* WHAT...For the Extreme Cold Warning, dangerously cold wind chills
as low as 30 to 40 below zero expected. For the Cold Weather
Advisory, very cold wind chills as low as 15 to 30 below expected.
* WHERE...Portions of central, north central, and northeast Illinois.
* WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday.
For the Cold Weather Advisory, from noon Friday to 9 AM CST
Saturday.
* IMPACTS...Dangerously cold wind chills could cause frostbite on
exposed skin in as little as 10 minutes.
* ADDITIONAL DETAILS...Coldest wind chills are expected across
interior portions of northern Illinois.
From: Jan 22, 2026 17:24
Until: Jan 23, 2026 03:30
Extreme Cold Warning
* WHAT...Dangerously cold wind chills as low as 30 below expected.
* WHERE...Central Cook County.
* WHEN...From 3 AM to noon CST Friday.
* IMPACTS...The dangerously cold wind chills as low as 30 below zero
could cause frostbite on exposed skin in as little as 10 minutes.
From: Jan 22, 2026 09:12
Until: Jan 22, 2026 19:15
Extreme Cold Warning
* WHAT...Dangerously cold wind chills between 30 and 40 below
expected.
* WHERE...Portions of central, north central, and northeast Illinois.
* WHEN...From 3 AM to noon CST Friday.
* IMPACTS...Dangerously cold wind chills as low as 35 below zero
could cause frostbite on exposed skin in as little as 10 minutes.
* ADDITIONAL DETAILS...Coldest wind chills are expected across
interior portions of northern Illinois.
From: Jan 22, 2026 09:12
Until: Jan 22, 2026 19:15
Cold Weather Advisory
* WHAT...Very cold wind chills between 20 and 30 below expected.
* WHERE...In Illinois, Ford and Iroquois Counties. In Indiana,
Benton, Jasper, Lake IN, Newton, and Porter Counties.
* WHEN...From 3 AM CST /4 AM EST/ to noon CST /1 PM EST/ Friday.
* IMPACTS...The dangerously cold wind chills as low as 25 below zero
could cause frostbite on exposed skin in as little as 30 minutes.
From: Jan 22, 2026 09:12
Until: Jan 22, 2026 19:15
Extreme Cold Watch
* WHAT...Dangerously cold wind chills as low as 35 below possible.
* WHERE...Portions of north central and northeast Illinois.
* WHEN...From late tonight through Friday morning.
* IMPACTS...The dangerously cold wind chills as low as 35 below zero
could cause frostbite on exposed skin in as little as 10 minutes.
From: Jan 22, 2026 06:03
Until: Jan 22, 2026 16:15
Winter Weather Advisory
* WHAT...Snow expected. Total snow accumulations between 2 and 5
inches, highest near the Wisconsin-Illinois state line.
* WHERE...Winnebago, Boone, McHenry, and Lake IL Counties.
* WHEN...From 8 PM this evening to 6 AM CST Wednesday.
* IMPACTS...Be prepared for hazardous travel due to snow covered
roads. The slippery conditions may also impact part of the
Wednesday morning commute.
From: Jan 20, 2026 10:00
Until: Jan 20, 2026 20:00
Special Weather Statement
Southwest winds 20 to 25 mph will become west early this morning,
with gusts locally as high as 45 to 50 mph at times through about
9 am CST. Winds will then steadily diminish through the late
morning and afternoon hours.
These strong westerly winds may cause difficulty for high profile
vehicles, particularly on north south oriented roads in open
areas.
From: Jan 09, 2026 10:31
Until: Jan 09, 2026 15:00
Flood Advisory
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...A portion of northeast Illinois, including the following
counties, Cook, DuPage and Will.
* WHEN...Until 830 AM CST Friday.
* IMPACTS...Creeks and streams may rise out of their banks and
remain elevated. Road and street flooding may continue. Flooding
may continue in poor drainage and urban areas. High water will
recede slowly.
* ADDITIONAL DETAILS...
- At 1025 PM CST, Doppler radar and automated rain gauges
indicated that heavy rainfall had moved out of the area, but
up to 3 inches of rain occurred during the afternoon and
evening hours. Multiple stream gauges indicate rapid rises
and standing water remains on multiple roadways. Roadway
flooding will likely improve over the next few hours, with
stream levels decreasing during the overnight hours.
- Flooding impacts will continue, but little to no additional
rainfall is expected.
- Some locations that may continue to experience flooding
include...
Chicago, Joliet, Naperville, Cicero, Evanston, Bolingbrook,
Skokie, Des Plaines, Orland Park, Tinley Park, Oak Lawn,
Berwyn, Wheaton, Oak Park, Downers Grove, Glenview, Elmhurst,
Lombard, Ohare Airport and Carol Stream.
- http://www.weather.gov/safety/flood
From: Jan 09, 2026 04:26
Until: Jan 09, 2026 14:30
Hydrologic Outlook
ESFLOT
Waves of showers and thunderstorms are expected this afternoon and
evening across portions of northeastern Illinois and northwestern
Indiana. The highest rainfall rates are expected this evening as
atmospheric moisture increases to near record levels for January and
a line of showers and thunderstorms moves through the area. Small
isolated corridors may receive rainfall in excess of 1-2 inches,
especially in areas where storms orient in a more southwest to
northeast direction. Rainfall amounts of this magnitude sometimes
cause localized flooding of streams and poor drainage areas during
the winter months. Areas with streets, drainage ditches, and
stormwater drains impacted by late fall and early winter vegetation
debris may be especially susceptible to flooding.
This outlook means that elevated water levels and potential impacts
are possible, but not yet certain, based upon the latest forecasts.
Persons with interests along area streams and rivers should closely
monitor the latest forecasts. In addition, ensure that nearby
stormwater drains and ditches are cleared of debris.
From: Jan 08, 2026 19:57
Until: Jan 09, 2026 06:00
Wind Advisory
* WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. A
few gusts to 55 mph possible.
* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.
* WHEN...From 6 PM CST /7 PM EST/ Sunday to 6 PM CST /7 PM EST/
Monday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
From: Dec 29, 2025 00:00
Until: Dec 30, 2025 00:00
Wind Advisory
* WHAT...West winds 25 to 35 mph with gusts of 45 to 55 mph early
this morning, easing to occasional gusts to around 45 mph by mid
morning.
* WHERE...Northern and central Illinois and extreme northwest Indiana
* WHEN...Until noon CST today.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
From: Dec 29, 2025 08:35
Until: Dec 29, 2025 18:00
Winter Weather Advisory
* WHAT...Wind driven light snow and blowing snow causing localized
hazardous travel. Snow accumulations of up to around one inch.
Winds gusting as high as 55 mph.
* WHERE...Boone, De Kalb, Ogle, Winnebago, Kane, Lake IL, McHenry,
and Northern Cook Counties.
* WHEN...Until 10 AM CST this morning.
* IMPACTS...Plan on slick road conditions. Areas of blowing snow
could significantly reduce visibility. The hazardous conditions
could impact the Monday morning commute.
From: Dec 29, 2025 09:35
Until: Dec 29, 2025 16:00
Wind Advisory
* WHAT...West winds 25 to 35 mph with gusts of 45 to 55 mph expected.
* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.
* WHEN...Until 3 PM CST /4 PM EST/ Monday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* ADDITIONAL DETAILS...Periods of wind-whipped snow showers tonight
through Monday morning may result in locally hazardous travel
conditions due to snow coating some roads and areas of blowing
snow from the strong winds.
From: Dec 29, 2025 03:21
Until: Dec 29, 2025 13:30
Winter Weather Advisory
* WHAT...Snow and blowing snow causing localized hazardous travel.
Snow accumulations of up to one to two inches. Winds gusting as
high as 55 mph.
* WHERE...Boone, De Kalb, Ogle, Winnebago, Kane, Lake IL, McHenry,
and Northern Cook Counties.
* WHEN...Until 3 PM CST Monday.
* IMPACTS...Plan on slick road conditions. Areas of blowing snow
could significantly reduce visibility. The hazardous conditions
could impact the Monday morning commute.
* ADDITIONAL DETAILS...Any lingering moisture on untreated roads may
freeze as temperatures fall into the teens to around 20 degrees
overnight.
From: Dec 29, 2025 03:07
Until: Dec 29, 2025 13:15
