Hail in Yorkville · Apr 17, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.
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Convective day · Apr 17, 2026 · noon–noon UTC
Severity
The 11th most severe storm Yorkville has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 0 /100
- Homes exposed
- 0 /100
- Ground truth
- 0 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Yorkville saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Only the NEXRAD radar-signature surface resolved for Apr 17, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
The storm in context
Where Apr 17, 2026 sits in Yorkville's hail record.
This was Yorkville's 4th recorded hail day, arriving 18 days after the Mar 30, 2026 storm. By severity it ranks 11th of the 11 storms we have logged here. Radar put the day's largest stone over Yorkville at 0" — radar-estimated size aloft.
The Apr 17, 2026 convective day was bigger than Yorkville: the same system put hail over 1,016 other tracked cities, 101 of them in Illinois. Nearest: Plano (5 miles west, up to 0"); Naperville (11 miles east, up to 0"); Sycamore (26 miles northwest, up to 0").
These maps are stills. In the app this date is one of 11 Yorkville storm dates on a live map — both surfaces, the reports, and a replay — and the same map is where you draw the swath. This page rebuilds nightly.
Ground reports
What people on the ground reported
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
For this storm over Yorkville, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.
Below the severe threshold
What 0" hail means for Yorkville roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Yorkville hail history
Other storms in Yorkville.
Estimated-size surface Aug 11, 2026
0.75"
Estimated-size surface Jul 27, 2026
1.25"
Estimated-size surface Jul 4, 2026
1.5"
Estimated-size surface Jul 3, 2026
1.75"
Estimated-size surface Jul 2, 2026
1.75"
Estimated-size surface Jun 10, 2026
0.75"
NEXRAD surface Apr 21, 2026
0.5"
Estimated-size surface Mar 30, 2026
1.75"
Estimated-size surface Mar 26, 2026
1"
Estimated-size surface Mar 10, 2026
0.75"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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