The most recent reported hail day was 2024-07-19 -- 2 years ago, with nothing reported since. Prowers County is hit in most years, and usually several times over. The largest stone on record here is 3 inches, a teacup and 3 times the National Weather Service's 1 inch severe criterion, reported on 2018-07-29 near Granada.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Colorado. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2024-07-19, around Bristol. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Prowers 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 ->NOAA's Storm Prediction Center has logged 60 separate hail days here since 2010 -- 3.5 a year over 17 years of record. Those days carry 138 separate reports between them, two or three on a typical one. 2 of those 17 years produced none at all. The busiest single year was 2020, with 8 hail days. The last five years have been quieter than the long run: 12 days since 2022, against 4.0 a year before that.
13 of the 60 days reached 2 inches or more -- 22%, or about one hail day in 5, the last on 2024-05-29. Those big days do not follow the county's usual calendar: most of them fall in May, not June. 26 of the 60 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Colorado, see the Colorado hail map and history.
Reports cluster nearest Lamar -- 27 of the county's 60 hail days -- then Bristol (15), Wiley (12), Holly (10) and Granada (9). That one town is named on 45% of them. Beyond those, NOAA names Hartman and Two Buttes on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Lamar | 9 | 2.75″ |
| 4 NE Lamar | 5 | 3.00″ |
| Holly | 4 | 2.75″ |
| Wiley | 4 | 2.00″ |
| Granada | 3 | 3.00″ |
The season runs May through July: 50 of the 60 hail days on record fall in those 3 months (83%). June is the single busiest month, with 21 of them (35%). That peak sits inside the window rather than at either end. Hail has also been reported in April, August and September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 2 |
| May | 17 |
| June | 21 |
| July | 12 |
| August | 7 |
| September | 1 |
That day put 1 report on the map, the biggest 1 inch near Bristol. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2024-07-19 | 1.00″ | 1 |
| 2024-05-29 | 2.25″ | 7 |
| 2024-05-18 | 1.00″ | 1 |
| 2023-07-10 | 1.00″ | 1 |
| 2023-07-06 | 2.75″ | 11 |
| 2023-07-02 | 2.00″ | 1 |
| 2023-06-23 | 1.75″ | 1 |
| 2022-06-07 | 1.50″ | 3 |
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 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own, over the state line included: Kiowa County (56 hail days), Bent County (32), Baca County (64), Hamilton County, Kansas (53) and Greeley County, Kansas (34). Prowers County sits in between.
Kiowa County · Bent County · Baca County · Hamilton County, Kansas · Greeley County, Kansas
Back to the Colorado hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Prowers County, Colorado only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.