HailEvidence → hail history by county → Montana → Petroleum County
Hail dates in Petroleum County, Montana
The National Weather Service has recorded hail in Petroleum County on 21 days since 2016 (37 separate reports, 36 of them quarter-size or larger). The largest stone on record was 3.50" (tea cup) on June 15, 2025; the most recent hail was July 17, 2025. Every row below is an official NWS record. Check hail at your exact address, free →
Every hail day in Petroleum County since 2016
One row per day the NWS logged hail somewhere in the county. The narrative names the town; the free check below narrows it to your address.
| Date | Largest hail | Reports | NWS narrative |
|---|---|---|---|
| 2025-07-17 | 2.00" (hen egg) | 2 | Public reported hen egg size hail. |
| 2025-06-15 | 3.50" (tea cup) | 5 | Large hail about 3.5 inches in diameter, lasted for about 15 mins. |
| 2025-06-13 | 1.00" (quarter) | 1 | Quarter-sized hail, heavy rain and 70 mph wind gusts caused considerable tree damage in Winnett. |
| 2023-07-29 | 1.00" (quarter) | 1 | The public reported hail up to the size of quarters. |
| 2022-07-14 | 1.00" (quarter) | 1 | Public reported hail up to the size of quarters. |
| 2022-07-04 | 1.00" (quarter) | 1 | Petroleum County Sheriff reported hail up to the size of quarters, blown into drifts. |
| 2021-08-26 | 1.25" (half dollar) | 3 | Public reported half dollar size hail. |
| 2021-06-10 | 1.00" (quarter) | 1 | Public reported, via Facebook, quarter size hail located off of US Highway 87, five miles north of the Musselshell County line. Time estimated from radar. |
| 2020-07-07 | 1.25" (half dollar) | 1 | Petroleum County Emergency Manager reported hail up to the size of half dollars. |
| 2020-05-20 | 1.75" (golf ball) | 1 | The Petroleum County Emergency Manager reported hail stones up to the size of golf balls. |
| 2019-08-11 | 3.00" (tea cup) | 3 | Trained spotter reported, via social media, tea cup size hail stones (3 inches in diameter). |
| 2019-06-14 | 1.75" (golf ball) | 2 | Public reported golf ball size hail. Time estimated from radar. |
| 2018-06-28 | 1.00" (quarter) | 1 | Petroleum County Emergency Manager reported quarter size hail and wind gusts up to 45 mph. |
| 2018-06-04 | 1.00" (quarter) | 2 | Trained spotter reported quarter size hail. |
| 2017-08-01 | 1.00" (quarter) | 2 | The hail was accompanied by little rain or wind. The length of the event is based on the spotter report and corroborated by radar. |
| 2017-07-10 | 0.75" (penny) | 1 | A trained spotter reported penny sized hail in addition to heavy rainfall and wind gusts up to approximately 50 mph. |
| 2017-04-23 | 1.00" (quarter) | 1 | Public reported nickel to quarter sized hail. |
| 2016-07-09 | 1.00" (quarter) | 1 | Trained spotter reported quarter sized hail. |
| 2016-06-24 | 1.25" (half dollar) | 2 | Trained spotter reported half dollar hail covering the ground. |
| 2016-06-10 | 2.50" (tennis ball) | 2 | Strom chaser reported tennis ball sized hail just inside the edge of Petroleum County. |
| 2016-06-09 | 2.00" (hen egg) | 3 | Petroleum County Emergency Manager reported hen egg sized hail, wind gusts to 50 mph, trees downed, roofs and siding damaged, and power outages. Event also r… |
Hail days by year
| Year | Hail days | Reports | Largest |
|---|---|---|---|
| 2025 | 3 | 8 | 3.50" (tea cup) |
| 2023 | 1 | 1 | 1.00" (quarter) |
| 2022 | 2 | 2 | 1.00" (quarter) |
| 2021 | 2 | 4 | 1.25" (half dollar) |
| 2020 | 2 | 2 | 1.75" (golf ball) |
| 2019 | 2 | 5 | 3.00" (tea cup) |
| 2018 | 2 | 3 | 1.00" (quarter) |
| 2017 | 3 | 4 | 1.00" (quarter) |
| 2016 | 4 | 8 | 2.50" (tennis ball) |
Damaging wind in Petroleum County
Thunderstorm wind of 58 mph or more (the NWS severe threshold), 34 reports since 2016, strongest 78 mph. 2 tornadoes recorded in the county in the same period. Wind and tornado records are included in the extended report.
| Date | Peak gust | Reports | NWS narrative |
|---|---|---|---|
| 2019-07-14 | 78 mph | 3 | A 78 mph wind gust was measured at the Winnett Handar site (GGWWT). |
| 2026-05-13 | 72 mph | 8 | The Winnett SW Montana Climate Office mesonet site (WIEM8) measured a 72 mph wind gust. |
| 2016-06-10 | 72 mph | 2 | Dry Blood Creek RAWS site recorded a 72 mph wind gust. |
| 2022-06-28 | 71 mph | 2 | The Dry Blood Creek RAWS site (DBCM8) recorded a 71 mph thunderstorm wind gust. |
| 2025-06-13 | 70 mph | 1 | Quarter-sized hail, heavy rain and 70 mph wind gusts caused considerable tree damage in Winnett. |
| 2025-07-17 | 66 mph | 4 | A wind gust of 66 mph was measured at the Mosby South HydroMet site (Montana Climate Office network). |
| 2026-04-11 | 64 mph | 1 | The Winnett MT-200 DOT site (MTWIN) measured a 64 mph wind gust. |
| 2025-08-17 | 64 mph | 5 | The Dovetail / Valentine E HydroMet site (VLTM8) from the Montana Climate Office Mesonet recorded a 64 mph wind gust. |
Was hail recorded at your Petroleum County address? Check free
Type a street address — or just a ZIP code. We measure it
against every hail event the National Weather Service recorded in the last 10 years and show you
how many fall within 1, 3 and 10 miles — free, instantly, nothing stored. Rural property with no street
address? Enter coordinates as 44.05, -107.31.
Address lookup by the U.S. Census Bureau geocoder. Records: NOAA NCEI Storm Events (final) plus SPC preliminary reports for storms newer than the latest compile — see methodology.
Need it in writing for a claim?
The verification report lists every NWS hail (and, in the extended version, wind and tornado) record within 1, 3 and 10 miles of one address, each linked to its official source, with the disputed date called out in plain English. Adjusters can verify every line.
10-year hail history for one address + the disputed-date finding.
15-year window, wind & tornado records, plus a drafted claim-appeal letter.
Questions
What date did hail last hit Petroleum County?
July 17, 2025, per the NWS Storm Events record. The largest since 2016 was 3.50" (tea cup) on June 15, 2025.
Does a county record prove hail at my house?
No. NWS records are point and path observations. The absence of a nearby report does NOT prove that no hail fell at this address — it means no observation was logged nearby. A report of nearby hail documents the event; it does not by itself prove damage to a specific structure. The free check above shows what was recorded near your specific address, with distances.
Nearby counties
Musselshell County, MT (37 mi) · Fergus County, MT (49 mi) · Golden Valley County, MT (57 mi) · Garfield County, MT (64 mi) · Wheatland County, MT (78 mi) · Yellowstone County, MT (80 mi) · Phillips County, MT (82 mi) · Judith Basin County, MT (84 mi)
See also: Montana hail history by city · all counties