Wind gust 68 mph
4 WNW Spencer Clay County
“ASOS station KSPW Spencer Municipal Airport. (FSD)”
— NOAA / SPC storm report
Hail in Spencer Jun 27, 2026
Hit 37 days agoBoth radar surfaces caught this storm: NEXRAD logged 0 hail signatures up to 1.75", and the radar-estimated size reached 1" aloft.
Largest hailstone
1.75"
≈ golf ball · the largest NEXRAD radar signature Homes in the hail footprint
3,074
Ground reports
1
1 windThe most severe storm Spencer has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.6 /10
- Hail size
- 44 /100
- Homes exposed
- 70 /100
- Ground truth
- 17 /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 Spencer saw the hail — from two instruments
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
NEXRAD radar signatures
Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Max size
1.75"
Detections
0
Radar-estimated hail size
The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Max size
1"
Where Jun 27, 2026 sits in Spencer's hail record
This was Spencer's 6th recorded hail day, arriving 27 days after the May 31, 2026 storm. By severity it ranks 1st of the 8 storms we have logged here. Radar put the day's largest stone over Spencer at 1.75" — the largest NEXRAD radar signature.
The Jun 27, 2026 convective day was bigger than Spencer: the same system put hail over 587 other tracked cities, 54 of them in Iowa. Nearest: Everly (8 miles northwest, up to 1.75"); Royal (8 miles southwest, up to 1"); Dickens (8 miles northeast, up to 1").
These maps are stills from Spencer's Jun 27, 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.
Wind reports
1 reportWhat 1.75" hail means for Spencer roofs
At an inch and a half, hail cracks shingles, strips granules down to the mat, and dents gutters, vents, and siding. A footprint like this typically produces a wave of insurance claims — and the contractor who reaches the homeowner first usually gets the inspection.
What this storm is worth to a roofer
$37M
Potential roof exposure — 3,074 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
15 jobs
Illustrative work
~$225K
Claims from this storm can typically be filed until around June 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Track hail over Spencer on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Spencer storm history — this Jun 27, 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
Spencer hail history
← All hail in Spencer 8 recorded storm days in Spencer, IA
Other storms in Spencer
Jul 1, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed 
Jun 28, 2026
1.75" Signatures 1.75" Estimated 0.75"
No ground reports filed 
May 31, 2026
May 25, 2026
May 17, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed 
Apr 22, 2026
0.75" Signatures 0.75"
No ground reports filed 
Apr 13, 2026
1.25" Signatures 1.25" Estimated 1"
No ground reports filed
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 surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.