Hail size 1.5"
1 SW Bridgeton St. Louis County
“Report from mPING: Ping Pong Ball (1.50 in.). (LSX)”
— NOAA / SPC storm report
/ Storm field report · St. Louis
Hail in Saint Louis · Apr 27, 2026
NEXRAD logged 63 hail signatures up to 2"; the estimated-size surface reached 1.5" aloft. At 2" — tennis ball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Peak hail signal 2" ≈ tennis ball · the largest NEXRAD radar signature
Homes in the hail footprint 88,796
Ground reports 4 3 hail · 1 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Apr 27, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Saint Louis has seen in the last 12 months
Composite score · 6.5 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
6.5 /10
- Peak hail signal
- 50 /100
- Homes exposed
- 99 /100
- Ground truth
- 67 /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 Saint Louis saw the hail — from two instruments
Apr 27, 2026 · Saint Louis, MO
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.
NEXRAD radar signatures Surface resolved
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.
Max size
2"
Detections
63
Radar-estimated hail size Surface resolved
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Max size
1.5"
The storm in context
Where Apr 27, 2026 sits in Saint Louis's hail record.
This was Saint Louis's 3rd recorded hail day, arriving 1 day after the Apr 26, 2026 storm. By severity it ranks 2nd of the 15 storms we have logged here. Radar put the day's largest stone over Saint Louis at 2" — the largest NEXRAD radar signature.
The Apr 27, 2026 convective day was bigger than Saint Louis: the same system put hail over 1,188 other tracked cities, 305 of them in Missouri. Nearest: Saint Charles (5 miles west, up to 2.5"); Ballwin (7 miles south, up to 1.75"); Hazelwood (9 miles northeast, up to 2").
These maps are stills. In the app this date is one of 15 Saint Louis 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
4 reports filed with the NWS
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.
Hail reports
3 reports Hail size 1"
2 WNW Town And Country St. Louis County
“(LSX)”
— NOAA / SPC storm report
Hail size 1"
1 S Saint John St. Louis County
“At Midland and I-170. (LSX)”
— NOAA / SPC storm report
Wind reports
1 report Wind gust 60 mph
Saint Ann St. Louis County
“power outage as the wind gust moved in. (LSX)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Hail was reported over 337 minutes, from to .
Reports came from Bridgeton, Town And Country, Saint John, and Saint Ann — beyond Saint Louis itself.
Severe hail signal
What 2" hail means for Saint Louis roofs.
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
88,796 homes × $12,000 avg. claim
Potential roof exposure
$1.1B
Potential roof exposure — 88,796 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 444 jobs
- Illustrative work
- ~$6.7M
Close just 0.5% of the 88,796 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claim window
April 2028
Claims from this storm can typically be filed until around April 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Names and phones for every home in the footprint: at most $18,647 on top of the $150 plan.
Saint Louis hail history
Other storms in Saint Louis.
15 recorded storm days in Saint Louis, MO
Estimated-size surface Storm date Saint Louis / MO
Aug 16, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
Jul 27, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
Jul 19, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
Jul 10, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
NEXRAD surface Storm date Saint Louis / MO
Jul 8, 2026
1.25" Signatures 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
Jul 4, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
Jul 3, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
Jun 11, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
May 31, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
May 18, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
May 16, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
May 4, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Saint Louis / MO
Apr 26, 2026
1.75" Signatures 1.75" Estimated 0.75"
11 ground reports Open report →
Estimated-size surface Storm date Saint Louis / MO
Mar 15, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
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.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 17, 2026.