Wind gust 70 mph
Sac City Sac County
“(DMX)”
— NOAA / SPC storm report
/ Storm field report · Sac
Hail in Sac City · May 17, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 0" ≈ pea to penny · radar-estimated size aloft
Homes in the hail footprint 0
Ground reports 1 1 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · May 17, 2026 · noon–noon UTC
Severity
The 8th most severe storm Sac City has seen in the last 12 months
Composite score · 0.2 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
0.2 /10
- Peak hail signal
- 0 /100
- Homes exposed
- 0 /100
- Ground truth
- 17 /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 Sac City saw the hail — from two instruments
May 17, 2026 · Sac City, IA
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.
NEXRAD radar signatures Surface resolved
Radar signature field 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.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field 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.
Max size
0"
The storm in context
Where May 17, 2026 sits in Sac City's hail record.
This was Sac City's 3rd recorded hail day, arriving 2 days after the May 15, 2026 storm. By severity it ranks 8th of the 9 storms we have logged here. Radar put the day's largest stone over Sac City at 0" — radar-estimated size aloft.
The May 17, 2026 convective day was bigger than Sac City: the same system put hail over 894 other tracked cities, 139 of them in Iowa. Nearest: Storm Lake (10 miles northwest, up to 1"); Fonda (10 miles northeast, up to 0"); Schaller (15 miles west, up to 1").
These maps are stills. In the app this date is one of 9 Sac City 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
1 report 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.
Wind reports
1 reportBelow the severe threshold
What 0" hail means for Sac City 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
Sac City hail history
Other storms in Sac City.
9 recorded storm days in Sac City, IA
Estimated-size surface Storm date Sac City / IA
Aug 12, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sac City / IA
Aug 10, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sac City / IA
Jul 8, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sac City / IA
Jul 2, 2026
No ground reports filed Open report →
Estimated-size surface Storm date Sac City / IA
Jun 27, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sac City / IA
Jun 16, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sac City / IA
May 15, 2026
2.25" Signatures 2.25" Estimated 1.25"
No ground reports filed Open report →
NEXRAD surface Storm date Sac City / IA
Apr 3, 2026
0.5" Signatures 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.
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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 13, 2026.