Hail size 1"
Tea Lincoln County
“(FSD)”
— NOAA / SPC storm report
/ Storm field report · Lincoln
Hail in Sioux Falls · May 17, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1.5" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.5" ≈ ping-pong ball · radar-estimated size aloft
Homes in the hail footprint 73,239
Ground reports 4 4 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · May 17, 2026 · noon–noon UTC
Severity
The most severe storm Sioux Falls has seen in the last 12 months
Composite score · 5.7 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.7 /10
- Peak hail signal
- 38 /100
- Homes exposed
- 97 /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 Sioux Falls saw the hail — from two instruments
May 17, 2026 · Sioux Falls, SD
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 Surface resolved
Radar signature field Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field 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
1.5"
The storm in context
Where May 17, 2026 sits in Sioux Falls's hail record.
This was Sioux Falls's 2nd recorded hail day, arriving 34 days after the Apr 13, 2026 storm. By severity it ranks 1st of the 10 storms we have logged here. Radar put the day's largest stone over Sioux Falls at 1.5" — radar-estimated size aloft.
The May 17, 2026 convective day was bigger than Sioux Falls: the same system put hail over 894 other tracked cities, 49 of them in South Dakota. Nearest: Brandon (6 miles northeast, up to 1.5"); Harrisburg (10 miles south, up to 1"); Valley Springs (11 miles east, up to 1.75").
These maps are stills. In the app this date is one of 10 Sioux Falls 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
4 reports Hail size 1"
5 W Sioux Falls Minnehaha County
“Report from mPING. (FSD)”
— NOAA / SPC storm report
Hail size 1"
4 NW Harrisburg Lincoln County
“Report from 85th and Western of quarter size hail. (FSD)”
— NOAA / SPC storm report
Hail size 1.5"
4 SSE Sioux Falls Lincoln County
“(FSD)”
— 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 15 minutes, from to .
Reports came from Tea and Harrisburg — beyond Sioux Falls itself.
High damage potential
What 1.5" hail means for Sioux Falls roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
73,239 homes × $12,000 avg. claim
Potential roof exposure
$879M
Potential roof exposure — 73,239 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 366 jobs
- Illustrative work
- ~$5.5M
Close just 0.5% of the 73,239 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
May 2028
Claims from this storm can typically be filed until around May 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 $15,380 on top of the $150 plan.
Sioux Falls hail history
Other storms in Sioux Falls.
10 recorded storm days in Sioux Falls, SD
Estimated-size surface Storm date Sioux Falls / SD
Aug 28, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Sioux Falls / SD
Jul 25, 2026
0.75" Estimated 0.75"
5 ground reports Open report →
Estimated-size surface Storm date Sioux Falls / SD
Jul 4, 2026
1.75" Signatures 1.75" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Sioux Falls / SD
Jul 2, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Sioux Falls / SD
Jun 30, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sioux Falls / SD
Jun 27, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sioux Falls / SD
May 31, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Sioux Falls / SD
May 24, 2026
1" Estimated 1"
3 ground reports Open report →
Estimated-size surface Storm date Sioux Falls / SD
Apr 13, 2026
0.75" Estimated 0.75"
7 ground reports 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 29, 2026.