Wind gust 68 mph
9 NNW Vivian Lyman County
“Mesonet station 13 Vivian (SDDOT). (ABR)”
— NOAA / SPC storm report
/ Storm field report · Stanley
Hail in Fort Pierre · Jun 4, 2026
NEXRAD logged 7 hail signatures up to 2.5"; the estimated-size surface reached 1.5" aloft. At 2.5" — baseball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
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Peak hail signal 2.5" ≈ baseball · the largest NEXRAD radar signature
Homes in the hail footprint 2
Ground reports 2 2 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Jun 4, 2026 · noon–noon UTC
Severity
The 4th most severe storm Fort Pierre has seen in the last 12 months
Composite score · 4.5 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.5 /10
- Peak hail signal
- 63 /100
- Homes exposed
- 10 /100
- Ground truth
- 33 /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 Fort Pierre saw the hail — from two instruments
Jun 4, 2026 · Fort Pierre, 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
2.5"
Detections
7
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 Jun 4, 2026 sits in Fort Pierre's hail record.
This was Fort Pierre's 4th recorded hail day, arriving 1 day after the Jun 3, 2026 storm. By severity it ranks 4th of the 12 storms we have logged here. Radar put the day's largest stone over Fort Pierre at 2.5" — the largest NEXRAD radar signature.
The Jun 4, 2026 convective day was bigger than Fort Pierre: the same system put hail over 241 other tracked cities, 80 of them in South Dakota. Nearest: Pierre (23 miles northeast, up to 1.75"); Murdo (25 miles south, up to 1.75"); Draper (28 miles south, up to 1").
These maps are stills. In the app this date is one of 12 Fort Pierre 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
2 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.
Wind reports
2 reports Wind gust 64 mph
9 NNW Vivian Lyman County
“Mesonet station 13 Vivian (SDDOT). (ABR)”
— 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.
Reports came from Vivian — beyond Fort Pierre itself.
Severe hail signal
What 2.5" hail means for Fort Pierre 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.
2 homes × $12,000 avg. claim
Potential roof exposure
$24K
Potential roof exposure — 2 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
June 2028
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.
Names and phones for every home in the footprint: at most $0 on top of the $150 plan.
Fort Pierre hail history
Other storms in Fort Pierre.
12 recorded storm days in Fort Pierre, SD
Estimated-size surface Storm date Fort Pierre / SD
Sep 13, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jul 25, 2026
3.5" Signatures 3.5" Estimated 2"
8 ground reports Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jul 7, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jul 2, 2026
2.25" Signatures 2.25" Estimated 1.5"
2 ground reports Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jun 28, 2026
1.75" Signatures 1.75" Estimated 1.25"
4 ground reports Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jun 27, 2026
1.75" Signatures 1.75" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jun 26, 2026
1.75" Signatures 1.75" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jun 9, 2026
1.5" Estimated 1.5"
3 ground reports Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jun 3, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Fort Pierre / SD
Jun 2, 2026
1.75" Signatures 1.75" Estimated 1"
1 ground report Open report →
Estimated-size surface Storm date Fort Pierre / SD
Apr 22, 2026
1" Signatures 1" Estimated 0.75"
1 ground report Open report →
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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 Sep 14, 2026.