IllinoisState outlook
Eight days at a glance
Select a date to exploreWednesday, Apr 2, 2025
In parts of the state
High Risk
severe risk levels
The SPC outlook places parts of the state in a high risk of severe thunderstorms.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 1 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 2:57 PM CDT
- Valid from
- Apr 2, 2025, 3:00 PM CDT
- Valid until
- Apr 3, 2025, 7:00 AM CDT
Original national SPC graphic from the same named issuance. The data issue time and the time printed on the graphic are source-specific and can differ slightly.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
Thursday, Apr 3, 2025
In parts of the state
Slight Risk
severe risk levels
The SPC outlook places parts of the state in a slight risk of severe thunderstorms.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 2 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 12:30 PM CDT
- Valid from
- Apr 3, 2025, 7:00 AM CDT
- Valid until
- Apr 4, 2025, 7:00 AM CDT
Original national SPC graphic from the same named issuance. The data issue time and the time printed on the graphic are source-specific and can differ slightly.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
Friday, Apr 4, 2025
In parts of the state
Slight Risk
severe risk levels
The SPC outlook places parts of the state in a slight risk of severe thunderstorms.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 3 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 2:27 PM CDT
- Valid from
- Apr 4, 2025, 7:00 AM CDT
- Valid until
- Apr 5, 2025, 7:00 AM CDT
Original national SPC graphic from the same named issuance. The data issue time and the time printed on the graphic are source-specific and can differ slightly.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
Saturday, Apr 5, 2025
In parts of the state
15% or greater
Severe weather within 25 miles
An SPC severe weather probability area includes parts of the state. It describes severe weather within 25 miles of a point during the outlook period.
This is an area threshold during the outlook period, not a precise personal probability or a chance of rain.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 4 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 4:00 AM CDT
- Valid from
- Apr 5, 2025, 7:00 AM CDT
- Valid until
- Apr 6, 2025, 7:00 AM CDT
Original national SPC graphic from the same named issuance. The data issue time and the time printed on the graphic are source-specific and can differ slightly.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
Sunday, Apr 6, 2025
In parts of the state
No 15% or 30% area
No 15% or 30% severe weather area includes parts of the state on this day. This does not mean zero risk.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 5 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 4:00 AM CDT
- Valid from
- Apr 6, 2025, 7:00 AM CDT
- Valid until
- Apr 7, 2025, 7:00 AM CDT
Original national SPC graphic from the same named issuance. The data issue time and the time printed on the graphic are source-specific and can differ slightly.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
Monday, Apr 7, 2025
Status for the whole day
Predictability Too Low
There is too much uncertainty for SPC to draw a 15% or 30% severe weather area for this day.
This is a status for the entire Storm Prediction Center outlook that day, not a measured local probability.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 6 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 4:00 AM CDT
- Valid from
- Apr 7, 2025, 7:00 AM CDT
- Valid until
- Apr 8, 2025, 7:00 AM CDT
The archived GeoJSON has an unlabeled no-area placeholder. The whole-day status was transcribed from this exact original SPC graphic, with both source hashes checked.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
Tuesday, Apr 8, 2025
Status for the whole day
Potential Too Low
The potential for organized severe storms is too low for SPC to draw a 15% or 30% area for this day. This does not rule out severe weather.
This is a status for the entire Storm Prediction Center outlook that day, not a measured local probability.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 7 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 4:00 AM CDT
- Valid from
- Apr 8, 2025, 7:00 AM CDT
- Valid until
- Apr 9, 2025, 7:00 AM CDT
The archived GeoJSON has an unlabeled no-area placeholder. The whole-day status was transcribed from this exact original SPC graphic, with both source hashes checked.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
Wednesday, Apr 9, 2025
Status for the whole day
Potential Too Low
The potential for organized severe storms is too low for SPC to draw a 15% or 30% area for this day. This does not rule out severe weather.
This is a status for the entire Storm Prediction Center outlook that day, not a measured local probability.
Across this outlook
The highest categorical risk in parts of the state is high risk on Apr 2
See the full outlookNational context
SPC Day 8 outlook
This national map gives the bigger picture. See the dated answer for Illinois on this page. The full official legend and issuance are preserved.
About this outlook
Archived published outlook. The issuance cutoff identifies the archived edition; the acquisition time records when the source files were retrieved. SPC issue and validity times describe each forecast.
- Issuance cutoff
- Apr 2, 2025, 2:57 PM CDT
- Acquired
- Oct 24, 2026, 11:56 PM CDT
- SPC issued
- Apr 2, 2025, 4:00 AM CDT
- Valid from
- Apr 9, 2025, 7:00 AM CDT
- Valid until
- Apr 10, 2025, 7:00 AM CDT
The archived GeoJSON has an unlabeled no-area placeholder. The whole-day status was transcribed from this exact original SPC graphic, with both source hashes checked.
View the official SPC source ↗Across Illinois
The state answer uses the complete reviewed state boundary, not the highest risk among its listed cities.
Available city pages for this published outlook; the state result covers the whole state.
The full eight-day outlook
Illinois · 2025
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Color has a meaning.
Five categories describe increasing severe weather risk. Thunderstorms sit outside that five-level scale. Extended outlooks use probability areas or a status for the day.