Hail in Slope County, North Dakota

Hail in Slope County, North Dakota: 96 recorded events between 1981 and 2025. The strongest on record measured 4.5. That places the county #1,477 nationally and #48 statewide for this hazard.

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for hail in Slope County is the 2010s, when 39 of the county's 96 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the Slope County archive, hail makes up 57.5% of all recorded severe weather across 7 hazard types. Nationally the county sits at #1,477 for this hazard and #48 within North Dakota, putting it in the 52.2 percentile of all U.S. counties.

Jul is the peak month for hail in Slope County with 48 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

• Thunderstorm Wind 49

How many hail events are on record in Slope County, North Dakota?

96 hail events are recorded in Slope County between 1981 and 2025, causing 0 direct deaths.

What is the strongest hail recorded in Slope County?

The strongest hail on record in Slope County measured 4.5.

Where does the hail data for Slope County come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.