Colorado Hail Storm Report, June 20, 2026: Evening Hail North of Greeley and Across Northeast Weld County
August 16, 2026
By Red Hawk Roofing
A train of evening storms crossed northeast Weld County on June 20, 2026, dropping a reported 2.25 inch stone north of Stoneham at 9:21 PM — and finishing with 1.50 inch hail measured by a trained spotter five miles north of Greeley at 10:38 PM, after most of the area had gone to bed.
The Colorado hail map — June 20, 2026
Every hail report from the evening of June 20
These are National Weather Service Local Storm Reports. Measured means an observer put a ruler or gauge on the stone; reported means a size category was selected. Times are MDT.
| Location | Size | Time | Source | Basis |
|---|---|---|---|---|
| 1 E Logan Corners | 2.50" | 9:55 PM | Storm Chaser | reported |
| 9 N Stoneham | 2.25" | 9:21 PM | Public | reported |
| 7 NNW Pawnee Buttes | 1.75" | 7:54 PM | Storm Chaser | measured |
| 1 SSW Lucerne | 1.50" | 10:38 PM | Trained Spotter | measured |
| 8 NE Grover | 1.25" | 8:21 PM | Public | reported |
| Sterling | 1.00" | 10:07 PM | Storm Chaser | measured |
The sequence tells the story: the storms started near the Pawnee Buttes just before 8 PM, worked southeast through Grover and Stoneham country, crossed into Logan County toward Sterling, and a final cell put measured 1.50 inch hail on Lucerne — five miles north of Greeley — at 10:38 PM. The biggest stones fell over rural ranchland; the closest report to Greeley itself is the Lucerne one. Six reports for hail this large is a thin set, but that is what 2.25 inch hail after 9 PM in ranch country generates — few people are outside to find the stones.
One honesty note about the map: radar underestimated this event. The 2.25 inch stone reported near Stoneham exceeds what the radar-estimated bands over the area suggest, so treat the shading as a floor for the search area, not a ceiling on stone size.
Was your address in this one? We'll come look, free.
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Was a warning issued?
Yes, repeatedly. NWS Denver/Boulder ran severe thunderstorm warnings covering the corridor at 7:17, 7:52, 8:03, 8:26 and 9:01 PM, then again at 10:22 and 10:46 PM — the last two bracketing the Lucerne hail. A tornado warning was also in effect for the same area from 7:35 to 8:03 PM.
Why 2.25-inch hail matters to an asphalt roof
Damage scales hard with stone size. A one-inch stone falls at about 41 mph and lands with roughly 1.3 joules of energy. A 1.75 inch stone falls at about 65 mph and lands with roughly 16 joules — about thirteen times the impact. Published impact studies put the onset of functional damage near 1.00 inch for three-tab asphalt shingles, 1.25 inches for architectural shingles, and 2.00 inches for Class 4 impact-rated products. The 2.25 inch stone reported north of Stoneham was past the threshold for even Class 4 products; the measured 1.50 inch stone near Lucerne was past the architectural-shingle threshold.
The damage usually is not visible from the ground — and for an evening storm like this one, it was dark before anyone could look. Hail bruises the shingle by fracturing the mat beneath a surface that still looks intact, and the bruised area sheds its protective granules over the following months.
What to do if you were under it
- Check from the ground, not the roof. Walking a hail-struck roof is how people get hurt.
- Look in your gutters. Granules washing off in quantity is the most common early sign.
- Check soft metal. Roof vents, gutters, flashing, the mailbox, AC condenser fins. Dents in soft metal date the storm.
- Photograph what you find with your phone. Phone photos carry a timestamp. Do not edit them.
- Get it inspected. Especially if this storm was months ago — that is exactly when bruising starts to surface.
Frequently asked questions
Was there hail in Greeley on June 20, 2026?
A trained spotter measured 1.50 inch hail one mile south-southwest of Lucerne — five miles north of Greeley — at 10:38 PM MDT on June 20, 2026. That is the closest official report to Greeley; the storm was a late-evening event most residents were asleep for.
How big was the hail on June 20, 2026 in northeast Colorado?
The largest report was 2.25 inches, nine miles north of Stoneham in rural northeast Weld County at 9:21 PM. A storm chaser also reported a 2.50 inch stone at Logan Corners in Logan County. Those large stones fell over rural ranch country — the closest report to Greeley itself was the measured 1.50 inch stone near Lucerne.
What time did the hail fall on June 20?
All reports came in the evening, between 7:54 PM and 10:38 PM MDT, as a train of storms moved from the Pawnee Buttes area southeast across northeast Weld County toward Sterling, with the Lucerne report north of Greeley arriving last.
Was a warning issued for this storm?
Yes. NWS Denver/Boulder issued a series of severe thunderstorm warnings covering the area from 7:17 PM through the 10:46 PM issuance that bracketed the Lucerne hail, and a tornado warning was in effect for the same area from 7:35 to 8:03 PM.
Could my roof still have damage from this storm?
Yes. Hail bruising fractures the shingle mat beneath a surface that still looks intact, and the bruised area sheds granules over the following months. Damage from a storm earlier in the season is often only becoming visible now, which is exactly why it is worth checking.
Red Hawk tracks every hail day across the Front Range. See our other storm reports for the rest of the 2026 season.
City-by-city hail histories
Not sure what to look for? Start with what hail damage looks like on a roof and the Colorado hail claim guide.
Red Hawk works Colorado roofs year round. We'll still be here next season.
Schedule My Free Inspectionor call (720) 771-8921
Storm figures are National Weather Service Local Storm Reports for the evening of June 20, 2026 (local time), retrieved from the Iowa Environmental Mesonet archive and de-duplicated; warning times are from the NWS watch/warning archive. Times are MDT and reports are grouped by the local calendar day. Radar swath analysis by ExoVzn, an independent forensic meteorology firm, using NOAA MRMS data. Radar figures are estimates. Storm reports indicate where hail occurred; only a physical inspection establishes whether a specific roof was damaged.