Hail size 1.25"
8 NE Grover Weld County
“Report from mPING: Half Dollar (1.25 in.). (BOU)”
— NOAA / SPC storm report
Hail in Grover Jun 20, 2026
Hit 44 days agoThe radar-estimated size surface caught this storm, reaching 1" aloft. NEXRAD logged no point detections over Grover this day.
Largest hailstone
1"
≈ quarter · radar-estimated size aloft Homes in the hail footprint
312
Ground reports
4
4 hailThe 5th most severe storm Grover has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.7 /10
- Hail size
- 25 /100
- Homes exposed
- 50 /100
- Ground truth
- 67 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Grover saw the hail — from two instruments
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
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.
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 9 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: Eaton (29 miles southwest, up to 1"); Burns (32 miles north, up to 0.75"); Cheyenne (33 miles west, up to 1").
These maps are stills from Grover's Jun 20, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
What people on the ground reported
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
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
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.
What 1" hail means for Grover roofs
Quarter-size and larger hail is where asphalt shingle damage starts in earnest: bruised mats and granule loss that homeowners can't see from the ground. Most people inside the footprint won't know their roof was hit until someone inspects it.
What this storm is worth to a roofer
$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
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.
Track hail over Grover on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Grover storm history — this Jun 20, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Grover hail history
← All hail in Grover 9 recorded storm days in Grover, CO
Other storms in Grover
Jul 9, 2026
1.25" Signatures 1.25" Estimated 1"
No ground reports filed 
Jul 8, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed 
Jul 3, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed 
Jul 1, 2026
2.5" Signatures 2.5" Estimated 2"
No ground reports filed 
Jun 26, 2026
2.5" Signatures 2.5" Estimated 1.75"
No ground reports filed 
Jun 24, 2026
2.25" Estimated 2.25"
No ground reports filed 
Jun 3, 2026
0.75" Signatures 0.75" Estimated 0.5"
No ground reports filed 
May 30, 2026
3" Signatures 3" Estimated 1"
No ground reports filed
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 surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.