Hail in Saint Charles Mar 15, 2026
Both radar surfaces caught this storm: NEXRAD logged 1 hail signature up to 0.75", and the radar-estimated size reached 0" aloft.
0.75"
≈ penny to nickel · the largest NEXRAD radar signature2,711
0
none filedThe 8th most severe storm Saint Charles has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Hail size
- 19 /100
- Homes exposed
- 69 /100
- Ground truth
- 0 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Saint Charles saw the hail — from two instruments
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.
Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
Where Mar 15, 2026 sits in Saint Charles's hail record
This was Saint Charles's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 8th of the 9 storms we have logged here. Radar put the day's largest stone over Saint Charles at 0.75" — the largest NEXRAD radar signature.
The Mar 15, 2026 convective day was bigger than Saint Charles: the same system put hail over 695 other tracked cities, 59 of them in Missouri. Nearest: Hazelwood (5 miles east, up to 1"); Florissant (11 miles east, up to 1.25"); Ballwin (14 miles south, up to 1").
These maps are stills from Saint Charles'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.
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.
No ground reports were filed with the National Weather Service for this storm over Saint Charles. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
What 0.75" hail means for Saint Charles roofs
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.
$33M
Potential roof exposure — 2,711 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Track hail over Saint Charles on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Saint Charles 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
9 recorded storm days in Saint Charles, MO
Other storms in Saint Charles
Jul 10, 2026
1"
Jul 4, 2026
1"
Jun 25, 2026
0.75"
Jun 11, 2026
0.5"
May 31, 2026
1"
May 3, 2026
2.5"
Apr 27, 2026
2.5"
Apr 17, 2026
1.75"