NEXRAD caught this storm: 5 hail signatures up to 0.75". The radar-estimated size surface had no signal to model this day.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
0.75"
≈ penny to nickel · the largest NEXRAD radar signature190
1
1 tornadoOverview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
Only the NEXRAD radar-signature surface resolved for Mar 15, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
This was Pana's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 4th of the 6 storms we have logged here. Radar put the day's largest stone over Pana at 0.75" — the largest NEXRAD radar signature.
The Mar 15, 2026 convective day was bigger than Pana: the same system put hail over 695 other tracked cities, 58 of them in Illinois. Nearest: Tower Hill (9 miles southeast, up to 1"); Shelbyville (11 miles east, up to 1"); Moweaqua (11 miles northeast, up to 0.5").
These maps are stills from Pana's Mar 15, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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.
“The tornado touched down just southwest of Assumption and town along W Illinois St where it uprooted and snapped numerous trees and knocked over a couple power poles. T (ILX)”
— NOAA / SPC storm report
Reports came from Assumption — beyond Pana itself.
Hail this size sits right at the edge of the National Weather Service severe threshold. Newer roofs usually shrug it off, but aging or already-worn shingles can bruise, and soft metals — vents, flashing, gutters — often show the first dents.
$2.3M
Potential roof exposure — 190 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Radar updates in real time, spotter reports appear on the map as they're filed, and the full Pana storm history — this Mar 15, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
6 recorded storm days in Pana, IL
Jul 4, 2026
0.5"
Jun 17, 2026
1"
May 3, 2026
1.75"
Apr 27, 2026
1.75"
Mar 22, 2026
0.5"