/ Storm field report · Musselshell

Hail in Roundup · Jul 16, 2026

The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Roundup that day. 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 1,248
Ground reports 3 1 hail · 2 wind
Radar surfaces 1 Estimated size only

Convective day · Jul 16, 2026 · noon–noon UTC

Severity

The 2nd most severe storm Roundup 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
38 /100

Largest radar-indicated size — a signal of damage potential, not confirmation.

Homes exposed
62 /100

How many homes sit inside the storm's footprint.

Ground truth
50 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How Roundup saw the hail — from two instruments

Jul 16, 2026 · Roundup, MT

We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.

Radar-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over Roundup, MT on Jul 16, 2026 Estimated size field

Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.

Max size 1.5"

Only the radar-estimated size surface resolved for Jul 16, 2026 — this storm produced no NEXRAD point detections over Roundup, so there is one map to show, not two.

The storm in context

Where Jul 16, 2026 sits in Roundup's hail record.

This was Roundup's 8th recorded hail day, arriving 2 days after the Jul 14, 2026 storm. By severity it ranks 2nd of the 11 storms we have logged here. Radar put the day's largest stone over Roundup at 1.5" — radar-estimated size aloft.

The Jul 16, 2026 convective day was bigger than Roundup: the same system put hail over 206 other tracked cities, 40 of them in Montana. Nearest: Musselshell (17 miles east, up to 1"); Lavina (23 miles west, up to 2"); Shepherd (24 miles south, up to 0.5").

These maps are stills. In the app this date is one of 11 Roundup 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

3 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

1 report
Hail size 1.75"
7 E Lavina Musselshell County

“Estimated 65 mph gusts. (BYZ)”

— NOAA / SPC storm report

Wind reports

2 reports
Wind gust 66 mph
11 SSE Klein Musselshell County

“(BYZ)”

— NOAA / SPC storm report
Wind gust 70 mph
6 E Lavina Golden Valley County

“Pea size hail and very heavy rain. (BYZ)”

— 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.

The storm tracked east at roughly 35 mph, based on the timing of ground reports.

Hail was reported over 30 minutes, from to .

Reports came from Lavina and Klein — beyond Roundup itself.

High damage potential

What 1.5" hail means for Roundup 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.

1,248 homes × $12,000 avg. claim

Potential roof exposure

$15M

Potential roof exposure — 1,248 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs
6 jobs
Illustrative work
~$90K

Close just 0.5% of the 1,248 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

July 2028

Claims from this storm can typically be filed until around July 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 $262 on top of the $150 plan.

Roundup hail history

Other storms in Roundup.

11 recorded storm days in Roundup, MT
← All hail in Roundup
Radar-estimated hail-size map of the storm over Roundup, MT on Sep 6, 2026 Estimated-size surface
Storm date Roundup / MT

Sep 6, 2026

2"
Estimated 2"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Aug 17, 2026 Estimated-size surface
Storm date Roundup / MT

Aug 17, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Jul 17, 2026 Estimated-size surface
Storm date Roundup / MT

Jul 17, 2026

0.75"
Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Jul 14, 2026 Estimated-size surface
Storm date Roundup / MT

Jul 14, 2026

1.5"
Estimated 1.5"
2 ground reports Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Jul 7, 2026 Estimated-size surface
Storm date Roundup / MT

Jul 7, 2026

2.5"
Signatures 2.5" Estimated 1.75"
2 ground reports Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Jul 5, 2026 Estimated-size surface
Storm date Roundup / MT

Jul 5, 2026

2"
Signatures 2" Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Jul 3, 2026 Estimated-size surface
Storm date Roundup / MT

Jul 3, 2026

0.5"
Signatures 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Jun 27, 2026 Estimated-size surface
Storm date Roundup / MT

Jun 27, 2026

0.75"
Signatures 0.75" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on Jun 7, 2026 Estimated-size surface
Storm date Roundup / MT

Jun 7, 2026

1.25"
Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Roundup, MT on May 29, 2026 Estimated-size surface
Storm date Roundup / MT

May 29, 2026

1"
Signatures 1" Estimated 0.5"
No ground reports filed 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 7, 2026.