Harmon County, Oklahoma Hail Map & History
Harmon County was hit as recently as 2026-08-25, 20 days ago. Harmon County is hit in most years, and usually several times over. The largest stone on record here is 3.2 inches and 3.2 times the National Weather Service's 1 inch severe criterion, reported on 2019-04-03 near Gould.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Oklahoma. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-08-25, around Gould. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Harmon County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->How often it hails in Harmon County
NOAA's Storm Prediction Center has logged 34 separate hail days here since 2010 -- 2.0 a year over 17 years of record. They carry 61 reports in total: most hail days here are logged from a single spot. 2 of those 17 years produced none at all. The busiest single year was 2012, with 5 hail days. The last five years have been quieter than the long run: 6 days since 2022, against 2.3 a year before that.
Roof-killing hail is routine here: 9 of the 34 days reached 2 inches or more, 26% of them, the last on 2026-08-25. They land in the same month as everything else, May. More than half of every hail day on record here -- 20 of 34 -- reached golf-ball size, 1.75 inches or bigger.
Across the whole of Oklahoma, see the Oklahoma hail map and history.
Hardest-hit places in Harmon County
Reports cluster nearest Hollis -- 21 of the county's 34 hail days -- then Gould (8), Vinson (6), Madge (5) and Mcqueen (2). That one town is named on 62% of them.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Hollis | 7 | 1.75″ |
| Gould | 5 | 3.00″ |
| 1 W Hollis | 4 | 2.25″ |
| 2 S Hollis | 3 | 1.75″ |
| 2 E Madge | 2 | 2.50″ |
When it hails in Harmon County
The season runs March through June: 29 of the 34 hail days on record fall in those 4 months (85%). May is the single busiest month, with 13 of them (38%). That peak sits inside the window rather than at either end. January, September and December are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| February | 1 |
| March | 2 |
| April | 8 |
| May | 13 |
| June | 6 |
| July | 1 |
| August | 1 |
| October | 1 |
| November | 1 |
Recent Harmon County hail days
That day put 1 report on the map, the biggest 3 inches near Gould. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-08-25 | 3.00″ | 1 |
| 2026-06-23 | 1.00″ | 1 |
| 2024-05-23 | 2.50″ | 6 |
| 2024-02-02 | 1.25″ | 1 |
| 2023-06-15 | 1.25″ | 1 |
| 2022-05-04 | 1.75″ | 1 |
| 2020-05-07 | 3.00″ | 1 |
| 2019-04-03 | 3.20″ | 6 |
How to read the Harmon County map
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 3.2 inches, which is the purple band. Look up a street address with the hail history by address tool.
Nearby counties
The nearest counties with a page of their own, over the state line included: Greer County (33 hail days), Jackson County (54), Beckham County (55), Collingsworth County, Texas (47) and Childress County, Texas (51). Harmon County sits in between.
Greer County · Jackson County · Beckham County · Collingsworth County, Texas · Childress County, Texas
Back to the Oklahoma hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Harmon County, Oklahoma only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.