Hail history for Rosston, Oklahoma
NOAA hail reports in and within about 5 km (3 miles) of Rosston since 1957, with preliminary reports to November 3, 2026.
Readout · Rosston
- Last hail
- Jun 16, 2026
- 1.75 in, golf ball size
- Hail days, last 5 years
- 3
- since Nov 3, 2021 · 4 reports
- Largest ever
- 2.75 in
- baseball · May 18, 2025
17 reports on 15 days since 1957 · #421 of 584 Oklahoma places
Hail map · Rosston
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Rosston
The latest hail report in and around Rosston is from June 16, 2026, 1.75 in (golf ball size). Since November 3, 2021 there have been 3 separate hail days; the biggest stones in that time were 2.75 in on May 18, 2025.
Over the 20 years 2006–2025, Rosston logged 6 reports on 5 hail days, about 0.3 reports a year. That is 33% less than the median Oklahoma town on this site (0.5 a year) and ranks #421 of 584 Oklahoma cities and towns on this site for all-time reports. Rosston accounts for 5% of the 368 reports filed in Harper County.
24% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median Oklahoma town on this site. The largest hail on record here is 2.75 in (baseball) on May 18, 2025 near Rosston.
The busiest year was 2025, with 3 reports on 2 days. Hail here peaks in May (53% of reports); 82% fall between April and June.
Reports a year 2006–2025 average
- Rosston 0.3
- Harper County 5.7
- Median Oklahoma town on this site 0.5
Hail days 2006–2025
- Rosston 5
- Harper County 53
- Median Oklahoma town on this site 8
Share 2 in or larger of sized reports
- Rosston 24%
- Harper County 12%
- Median Oklahoma town on this site 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | |||||||||||
| 2025 | 2 | 1 | 3 | ||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 1 | 1 | |||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 16, 2026 | 1 | 1.75 in | — |
| Sep 8, 2025 | 1 | 2.50 in | — |
| May 18, 2025 | 2 | 2.75 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| May 18, 2025 | 2.75 inbaseball | Rosston | Harper | 16:35 local · NCEI |
| May 18, 2025 | 2.75 inbaseball | 2.39 E Rosston | Harper | 16:35 local · NCEI |
| Sep 8, 2025 | 2.50 intennis ball | Rosston | Harper | 17:25 local · NCEI |
| May 24, 1958 | 2.00 inhen egg | — | Harper | 18:00 local · NCEI |
| Jun 16, 2026 | 1.75 ingolf ball | 3.21 WNW Rosston | Harper | 17:52 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 3 18%
- 1–2 in 10 59%
- 2 in + 4 24%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 16, 2026 | 1.75 ingolf ball | 3.21 WNW Rosston | Harper | 17:52 local · NCEI |
| Sep 8, 2025 | 2.50 intennis ball | Rosston | Harper | 17:25 local · NCEI |
| May 18, 2025 | 2.75 inbaseball | Rosston | Harper | 16:35 local · NCEI |
| May 18, 2025 | 2.75 inbaseball | 2.39 E Rosston | Harper | 16:35 local · NCEI |
| Sep 17, 2021 | 1.00 inquarter | 3.45 N Rosston | Harper | 18:00 local · NCEI |
| Jun 12, 2018 | 1.50 inping pong ball | 2.16 NW Rosston | Harper | 18:34 local · NCEI |
| May 23, 2007 | 1.75 ingolf ball | 4 N Laverne | Harper | 21:30 local · NCEI |
| May 1, 1997 | 0.75 inpenny | 2 W Rosston | Harper | 18:47 local · NCEI |
| Jun 21, 1991 | 1.00 inquarter | — | Harper | 21:48 local · NCEI |
| May 24, 1991 | 0.75 inpenny | — | Harper | 18:10 local · NCEI |
| May 24, 1991 | 0.75 inpenny | — | Harper | 17:10 local · NCEI |
| May 16, 1989 | 1.75 ingolf ball | — | Harper | 13:59 local · NCEI |
Hail history near Rosston
Questions about hail in Rosston
How often does it hail in Rosston, Oklahoma?
17 hail reports have been logged in and within about 5 km (3 miles) of Rosston since 1957. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #421 of 584 Oklahoma places by number of reports.
When is hail season in Rosston?
Most reports come in May, June, September. May alone accounts for 53% of all reports.
What is the largest hail recorded in Rosston?
2.75 in (baseball size) on May 18, 2025 near Rosston. 24% of reports here were 2 inches or larger.
When did it last hail in Rosston?
The most recent report in this data is from June 16, 2026 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Rosston had in the last five years?
3 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was June 16, 2026.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.