Hail size 1.25"
8 NE Grover Weld County
“Report from mPING: Half Dollar (1.25 in.). (BOU)”
— NOAA / SPC storm report
/ Storm field report · Weld
Hail in Grover · Jun 20, 2026
The estimated-size surface reached 1" aloft; NEXRAD logged no point detections over Grover that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 1" ≈ quarter · radar-estimated size aloft
Homes in the hail footprint 312
Ground reports 4 4 hail
Radar surfaces 1 Estimated size only
Convective day · Jun 20, 2026 · noon–noon UTC
Severity
The 5th most severe storm Grover has seen in the last 12 months
Composite score · 3.7 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.7 /10
- Peak hail signal
- 25 /100
- Homes exposed
- 50 /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 Grover saw the hail — from two instruments
Jun 20, 2026 · Grover, CO
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
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"
Only the radar-estimated size surface resolved for Jun 20, 2026 — this storm produced no NEXRAD point detections over Grover, so there is one map to show, not two.
The storm in context
Where Jun 20, 2026 sits in Grover's hail record.
This was Grover's 3rd recorded hail day, arriving 17 days after the Jun 3, 2026 storm. By severity it ranks 5th of the 13 storms we have logged here. Radar put the day's largest stone over Grover at 1" — radar-estimated size aloft.
The Jun 20, 2026 convective day was bigger than Grover: the same system put hail over 298 other tracked cities, 17 of them in Colorado. Nearest: Burns (20 miles northwest, up to 0.75"); Eaton (37 miles southwest, up to 1"); Greeley (43 miles southwest, up to 0.75").
These maps are stills. In the app this date is one of 13 Grover 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"
4 E Carpenter Laramie County
“Report from mPING: Quarter (1.00 in.). 4 miles east of Carpenter. (CYS)”
— NOAA / SPC storm report
Hail size 1.75"
7 NNW Pawnee Buttes Weld County
“(BOU)”
— NOAA / SPC storm report
Hail size 1.5"
11 SSE Burns Laramie County
“Spotter Network report of ping-ping ball sized hail 11 miles south-southeast of Burns or 6 miles north-northeast of Hereford... Colorado. (CYS)”
— 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 southeast at roughly 10 mph, based on the timing of ground reports.
Hail was reported over 72 minutes, from to .
Reports came from Carpenter, Pawnee Buttes, and Burns — beyond Grover itself.
Damage-capable hail signal
What 1" hail means for Grover roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
312 homes × $12,000 avg. claim
Potential roof exposure
$3.7M
Potential roof exposure — 312 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 2 jobs
- Illustrative work
- ~$30K
Close just 0.5% of the 312 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
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 $66 on top of the $150 plan.
Grover hail history
Other storms in Grover.
13 recorded storm days in Grover, CO
Estimated-size surface Storm date Grover / CO
Sep 5, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Aug 22, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Aug 14, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Aug 13, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Jul 9, 2026
1.25" Signatures 1.25" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Jul 8, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Jul 3, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Jul 1, 2026
2.5" Signatures 2.5" Estimated 2"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Jun 26, 2026
2.5" Signatures 2.5" Estimated 1.75"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Jun 24, 2026
2.25" Estimated 2.25"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
Jun 3, 2026
0.75" Signatures 0.75" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Grover / CO
May 30, 2026
3" Signatures 3" Estimated 1"
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 6, 2026.